PROJECT PLAN FOR

IMPLEMENTING NAD 83 IN THE

MINERALS MANAGEMENT SERVICE

PART I: Responsibilities and Timeframes

(INTERNET VERSION)

Prepared By:

Paul Rogers, Cartographer

Mapping & Survey Staff Boundary Branch

For:

Leland F. Thormahlen, Chief

Mapping & Survey Staff Boundary Branch

Denver, Colorado

May 3, 1993
i

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

OUTLINE/TABLE OF CONTENTS

page

 i. PREFACE TO THE INTERNET VERSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

 ii. EXECUTIVE SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

 1. INTRODUCTION ................................................. 1

 1.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

 1.2. About the Project Plan Document ................................. 1

 2. PROJECT PLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

 2.1. Introduction .................................................. 3

 2.2. NAD 27 Cadastres ............................................. 3

 2.3. Implementation Plan Phases I & II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

 2.3.1. OCS Regions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

 2.3.2. Headquarters and Program Staffs .............................. 4

 2.3.3. Mapping & Survey Staff (MSS) ................................ 5

 2.3.4. Offshore Systems Center (OSC) ............................... 6

 2.3.5. MMS NAD 83 Implementation Team (Team) . . . . . . . . . . . . . . . . . . . . . . 7

 2.3.6. Timeframes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

 2.4. Implementation Plan Phase III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

 2.4.1. OCS Regions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

 2.4.2. Headquarters and Program Staffs .............................. 8

 2.4.3. Mapping & Survey Staff (MSS) ................................ 8

 2.4.4. Offshore Systems Center (OSC) ............................... 8

 2.4.5. MMS NAD 83 Implementation Team (Team) . . . . . . . . . . . . . . . . . . . . . . 9

 2.4.6. Timeframes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

 3. DATUM REFERENCING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

 3.1. OCS Regions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

 3.2. Headquarters and Program Staffs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

 3.3. Mapping & Survey Staff (MSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

 3.4. Offshore Systems Center (OSC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

 4. IMPLEMENTATION PLAN UPDATES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

 5. INFORMATION TRANSFER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

 6. ADDITIONAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

 7. APPENDIX A--BRIEF HISTORY OF THE EVOLUTION OF THE FIVE NAD 27

 OFFSHORE CADASTRES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

 8. APPENDIX B--PLANNING AREA CONVERSION PRIORITIES . . . . . . . . . . . . 16
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 8.1. Sale Related Planning Area Datum Conversion Priorities . . . . . . . . . . . . . . 16

 8.2. Sale Related Official Protraction Diagram Datum 

 Conversions, By OCS Region and Planning Area . . . . . . . . . . . . . . . . . . . . . 17

 8.3. Non-Sale Related Planning Area Datum Conversions As

 Recommended By the MMS NAD 83 Implementation Team . . . . . . . . . . . . . 19

 8.4. Non-Sale Related Official Protraction Diagram Datum

 Conversions, By OCS Region and Planning Area . . . . . . . . . . . . . . . . . . . . . 20

 8.5. Planning Areas To Be Scheduled Later For Datum Conversion . . . . . . . . . 21

 8.6. Official Protraction Diagram Datum Conversions For

 Planning Areas To Be Scheduled Later, By OCS Region 

 and Planning Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

 9. APPENDIX C--ACRONYMS & ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . . 25

FIGURES

Figure 1. MMS NAD 83 planning area conversion schedule as

determined by the MMS NAD 83 Implementation Team . . . . . . . . . . . . . . . . . iv

Figure 2. Projected OCS Regional Implementation 

timeframes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 3. Acceptable survey datums for datum-dependent 

data received by the MMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

i PREFACE TO INTERNET VERSION

This January 8, 1999, Internet version of “PROJECT PLAN FOR IMPLEMENTING

NAD 83 IN THE MINERALS MANAGEMENT SERVICE, PART I: Responsibilities

and Timeframes,” is identical to the official May 3, 1993 version released by the

Minerals Management Service except as noted below:

 The original document was developed using a Helvetica type style in

WordPerfect version 5 and a Hewlett Packard LaserJet Series 2 printer. This

Internet version was reformatted using an Arial type style in WordPerfect

version 8, and a Hewlett Packard LaserJet 4MV printer. This has resulted in

page numbering being slightly different from the original document.

 The name and phone number of the office within the Minerals Management

Service responsible of developing and maintaining the offshore cadastres has

been revised on the cover page and page 12.

 Figures 1 - 3 have been redrawn using WordPerfect 8.

 The Official Protraction Diagram (OPD) numbers have been revised to reflect

the numbering format currently used in the Block and Boundary Component of

the Minerals Management Service’s Technical Information Management

System (TIMS).

 The tables in Sections 8.2, 8.4, and 8.6 were recreated using WordPerfect 8.

 NAD 83 has been implemented in the Alaska, Atlantic, and Pacific OCS

Regions. The Gulf of Mexico OCS Region continues on NAD 27.
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PART I -- Responsibilities and Timeframes

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Reformatted for the Internet: January 8, 1999

ii. EXECUTIVE SUMMARY

Over the last five years (1987-92), the Minerals Management Service (MMS) has

evaluated and tested various options for implementing the latest United States

horizontal control datum--the North American Datum of 1983 (NAD 83). Initially the

MMS examined not only what impact NAD 83 would have on the Agency, but also

should the conversion be made from the North American Datum of 1927 (NAD 27) to

NAD 83. In June 1989, the Federal Government officially adopted NAD 83 (54 FR

25318, June 14, 1989), rendering moot any option the Agency may have had in not

converting. All efforts were then directed towards how to convert to NAD 83 with

minimal adverse program impact and expense.

There are two major aspects to MMS implementation of NAD 83. First, the Agency has

to implement NAD 83 with minimal program disruption, while maintaining the integrity of

existing NAD 27 leaseholds. MMS's phased approach to NAD 83 implementation

based upon the "Comprehensive Program" (Figure 1), specialized transformation

procedures, and the parallel implementation of the Technical Information Management

System (TIMS) accommodate this requirement.

OCS Region/*

Planning Area

Sale**

Number

Sale** Date MMS Target

Completion

Date***

OCS Region/*

Planning Area

Sale**

Number

Sale** Date MMS Target

Completion

Date***

Alaska/

 Beaufort Sea

 Chukchi Sea

 Cook Inlet/

 Shelikof Strait

 GOA (Yakutat)

 Hope Basin

 St. George

144

148

149

158

159

153

12/95

6/96

9/94

8/95

7/97

12/96

2/95

2/94

10/93

12/94

9/95

3/95

Atlantic/

 Mid-Atlantic

 South Atlantic

Gulf of Mexico/

 Eastern GOM

Pacific/

 Southern CA

 Wash./Oregon

164

164

151

N/A

N/A

10/96

10/96

10/95

N/A

N/A

11/94

11/94

TBD

TBD

TBD

*Conversion schedule for planning areas not listed to be determined at a later date by the MMS NAD 83 Implementation Team.

**”Comprehensive Program 1992-1997,” April 1992.

 N/A = Not Applicable.

***Completed OPD’s and SOBD’s due to regional office.

 MSS = Mapping & Survey Staff.

 TBD = To Be Determined.

Figure 1. MMS NAD 83 planning area conversion schedule as determined by the MMS NAD 83

Implementation Team.

That is not to say that every conceivable issue or problem has been addressed in the

project plan. At every level of government and private industry, NAD 83 implementation

is a dynamic process as the advent of the High Accuracy Reference Networks (HARN's)

illustrates.

HARN's are NAD 83 refinements, initiated by, and within, select individual States. 

However, technology, such as used in the Persian Gulf War, and the mushrooming use

of Land and Geographic Information Systems (LIS/GIS), created a demand for more

accurate positioning/surveying capabilities in the civilian sector than the original NAD 83
 1

 The year in parenthesis after NAD 83 indicates the year of adjustment, with the main NAD 83 adjustment

occurring in 1986. HARN adjustments will be dated sometime during the 1990's, with 199x indicating the year of

adjustment is unknown at this time.

 2

 Relative positioning is the location of features by relating their position in relation to known positions--e.g., well

locations so many feet or meters south/north and east/west of block boundaries.

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PART I -- Responsibilities and Timeframes

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adjustment (NAD 83 (1986)) provided. In response to this need, the National Geodetic

Survey plans to develop HARN's for all States over the next five years, effectively

creating a second NAD 83-based horizontal control network ((NAD 83 (199x)1.

Second, MMS employees must become datum conscious and verify datum references. 

Prior to 54 FR 25318 most Agency employees did not have to relate coordinates to a

specific datum. MMS coordinate and associated data referenced NAD 27, and although

other datums existed, MMS did not develop data tied to them. However, the United

States adoption of NAD 83 directly or indirectly affects every aspect of the Agency's

mission. Since the adoption of NAD 83, every locational coordinate (e.g., shot points)

and areal measurement (e.g., the number of 8(g) hectares on a Supplemental Official

OCS Block Diagram (SOBD)) must carry a specific datum reference. Do they reference

NAD 27? Do they reference the original NAD 83 adjustment--NAD 83 (1986)? Do they

reference a HARN--NAD 83 (199x)? Assumptions are no longer acceptable; the

mixing of datum-referenced data can cause major problems and expense for the

Agency.

The MMS holds and develops data which appear to be non-datum dependent. Some of

this data, however, has a direct relationship to coordinate data which are datum

dependent. For example:

! Rental fees and royalties for blocks leased within a planning area are

derived from areal measurements computed from cadastre grid and

boundary coordinates which are datum-dependent.

! Recent relative positioning2

 well spots have probably been

developed from cadastre grid and boundary coordinates, especially if

Global Positioning System (GPS) surveying, navigation, and

positioning techniques have been employed to spot wells.

This two part document amplifies the MMS NAD 83 Implementation Plan outlined in the

56 FR 20020, May 1, 1991. The first part, "Project Plan for Implementing NAD 83 in the

Minerals Management Service, Part I: Responsibilities and Timeframes," details the

various aspects of implementation, organizational unit responsibilities, and estimated

timeframes. The second part, "Project Plan for Implementing NAD 83 in the Minerals

Management Service, Part II: Technical Aspects of Implementation," details specific

technical aspects of the MMS conversion from NAD 27 to NAD 83 and identifies

associated organizational unit responsibilities. 
 3

 Although NAD 27 was in use for the conterminous 48 states and mainland Alaska, the Pribilof Islands (St. Paul

and St. George), St. Matthew Island, and St. Lawrence Island in Alaska; Puerto Rico; the Virgin Islands; and the

Hawaiian Islands were on separate or orphan datums.

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PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

PROJECT PLAN FOR

IMPLEMENTING NAD 83 IN THE

MINERALS MANAGEMENT SERVICE

PART I

Responsibilities and Timeframes

1. INTRODUCTION

1.1 Overview

Within the United States (U.S.), horizontal positioning data (latitude, longitude, and

plane coordinate systems) have been successively based on a series of datums. On

December 6, 1988, the Federal Geodetic Control Committee (FGCC) affirmed that the

North American Datum 1983 (NAD 83) was the official civilian horizontal datum of U.S.

surveying and mapping activities performed or financed by the Federal Government. 

Further, Federal civilian agencies engaged in surveying and mapping activities were

directed to convert from the contemporary datums being used--most notably the North

American Datum 1927 (NAD 27)3--to NAD 83 to the extent practicable, legally allowable

and feasible. Formal notification of this action was published in Federal Register (FR)

Notice 54 FR 25318, June 14, 1989.

In response to this policy mandate, the Minerals Management Service (MMS) has

developed a NAD 83 implementation plan entitled "Minerals Management Service,

North American Datum 1983 (NAD 83) Implementation Plan." The draft Plan was

published in 55 FR 48929, November 23, 1990. The official MMS NAD 83

Implementation Plan was approved by the Director, MMS on April 23, 1991, and

published in 56 FR 20020, May 1, 1991.

1.2. About the Project Plan Document

This two part document amplifies the MMS NAD 83 Implementation Plan outlined in the

56 FR 20020, May 1, 1991. The first part, "Project Plan for Implementing NAD 83 in

the Minerals Management Service, Part I: Responsibilities and Timeframes," details the

various aspects of implementation, organizational unit responsibilities, and estimated

timeframes. The second part, "Project Plan for Implementing NAD 83 in the Minerals

Management Service, Part II: Technical Aspects of Implementation," details specific

technical aspects of the MMS converting from NAD 27 to NAD 83 and identifies
2

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

associated organizational unit responsibilities.

The documents can be used independently. However, they are intended to be used in

association with each other. Each document is cross-referenced to the companion

document.
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PART I -- Responsibilities and Timeframes

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Reformatted for the Internet: January 8, 1999

2. PROJECT PLAN

2.1. Introduction

The plan was developed in compliance with the March 27, 1989, directive from the

MMS Deputy Associate Director for Offshore Leasing instructing the MMS Mapping &

Survey Staff (MSS) to develop a proposed NAD 83 implementation plan with assistance

from the Outer Continental Shelf (OCS) regional offices. This initial MMS NAD 83

Implementation Team (Team) evolved to include not only representatives from each of

the four OCS regions and MSS, but also MMS Headquarters and Program Staffs, the

Solicitor's Office, and the Offshore Systems Center (OSC).

The Team recommended a three-phase NAD 83 conversion effort designed to minimize

transition difficulties. Planning area conversions to NAD 83 began in Fiscal Year (FY)

1991. Total MMS conversion to NAD 83 may require more than 10 years. (See Part I,

Appendix B.) Each OCS region will determine its own planning area and/or sale area

conversion timeframes; thus, NAD 83 implementation varies among and within OCS

regions. 

2.2. NAD 27 Cadastres

The NAD 27 offshore cadastres have formed the legal base for the MMS program on

the OCS. MSS is the MMS office of responsibility for development, maintenance, and

depiction of the offshore cadastres and calculations of official coordinates and areal

measurements for projected and non-projected boundaries. There are five (5) separate

and distinct NAD 27 offshore cadastres:

1. Leasing Maps (LM's) based on the Louisiana State Plane Coordinate System

(SPCS) in a portion of the Central Gulf of Mexico Planning Area.

2. LM's based on the Texas SPCS in a portion of the Western Gulf of Mexico

Planning Area.

3. LM's based on the California SPCS in a portion of the Channel Islands area

in the Pacific OCS Region.

4. Official Protraction Diagrams (OPD's) based on a corrupted Universal

Transverse Mercator (UTM) grid system in the remainder of the Gulf of

Mexico OCS Region.

5. OPD's based on strict conformance to the parameters of a metric based

UTM system in the remainder of the Pacific OCS Region and the entire

Alaska and Atlantic OCS Regions.
 4

 From the inception of the offshore program until August 1, 1989 (54 FR 31737), one could confidently assume

that BLM/MMS datum-dependent OCS cadastre coordinates and areal measurements referenced NAD 27. 

Conversely, one might expect to make the same assumption relative to datum-dependent information provided by

industry to the BLM/MMS. However, after 1960 a variety of navigation and positioning systems came into use on the

OCS, some referencing, or creating information on, other datums. Thus, unless the datum is specifically identified,

especially on post-1960 datum-dependent coordinates and areal measurements, datum referencing could be to NAD

83, one of three World Geodetic Systems (WGS 60, WGS 72, or WGS 84), a local datum, etc.

 5

 In the MMS, normal NAD 83 implementation will be by entire planning areas. Implementation for less than an

entire planning area may occur when offshore leasing activity is planned for a relatively small portion of a large

planning area, e.g., the Gulf of Alaska Planning Area/Yakutat Subarea.

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PART I -- Responsibilities and Timeframes

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Reformatted for the Internet: January 8, 1999

Additional information on the evolution of these cadastres can be found in Part I,

Appendix A.

2.3. Implementation Plan Phases I & II

Phases I and II occur primarily within the OCS regions. However, the MSS and the

OSC will use these timeframes to develop tools and procedures necessary to

implement NAD 83. Phased implementation affords an OCS region maximum flexibility

in converting planning areas to NAD 83; an entire OCS region does not have to be

converted in order for sales in individual planning areas to be held on NAD 83.

2.3.1. OCS Regions. As indicated in 56 FR 20020, May 1, 1991, these two phases

provide time for OCS regions to identify the survey datum of their existing coordinate

data and to ensure newly submitted data will be compatible4

. A major difference

between Phase I and Phase II is the datum on which datum-dependent data may be

submitted to the Agency. During Phase I, NAD 27-based information will be permitted

provided that the datum (i.e., NAD 27) is explicitly identified. In Phase II, data submitted

to the agency must be referenced to NAD 83. Each OCS region will determine when it

has completed each phase and is ready to implement NAD 83 for one or more planning

areas. All OCS leasing will be conducted on NAD 27 until an OCS region implements

Phase III for all or part of a planning area5

.

Each OCS Regional Director will designate one or more regional representative(s) to

the Team. In some OCS regions it may be appropriate for each major division (i.e.,

Leasing & Environment, Field Operations, Resource Evaluation, and Office of Program

Services) to be represented. OCS regional Team members will represent a

comprehensive regional position on all NAD 83 issues and concerns. (See Part I,

section 2.3.5.) Two weeks after formal notification of a Team meeting, OCS Regional

Directors will submit issues, concerns, and proposed agenda items, or negative

responses, to the Chief, MSS in writing.

2.3.2. Headquarters and Program Staffs. Each Division Chief and Program Director will

designate one or more representative(s) to the Team. Staff Team members will

represent the staffs' position on all NAD 83 issues and concerns. (See Part I, section
 6

 When this document was written, the Offshore Block, Boundary, & MAP/OPD Information System (OB2MIS) was

being converted to the Block and Boundary component of the MMS Technical Information Management System

(TIMS). Unless a citation is OB2MIS-specific, throughout the remainder of this document, both OB2MIS and the

Block and Boundary component of TIMS will be referred to as "B&B, TIMS."

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Reformatted for the Internet: January 8, 1999

2.3.5.) Two weeks after formal notification of a Team meeting, Division Chiefs and

Program Directors will submit issues, concerns, and proposed agenda items, or

negative responses, to the Chief, MSS in writing.

The Office of Program Development and Coordination (OPDC) Supervisory Program

Analyst will ensure that adequate resources, as identified by the Chief, MSS, are

available each FY to accomplish the NAD 83 Annual Work Plan (AWP) developed by

the Team. All funds to support the "MMS/U.S. Geological Survey (USGS) Agreement"

(MMS/USGS Agreement) are to be available within the MSS budget for allocation via

purchase order at the beginning of each FY. (See Part II, section 5.)

2.3.3. Mapping & Survey Staff (MSS). In Phases I and II MSS's NAD 83-related

activities will be the development of data and products necessary for OCS regions to

make the conversion from NAD 27 to NAD 83. These products consist primarily of NAD

83-based OPD's and Supplemental Official OCS Block Diagrams (SOBD's).

Usually, boundary computations will be completed before NAD 83-referenced OPD's

are made available for release to the public. NAD 83 OPD's, SOBD's, Supplemental

Official Composite Block Diagrams (SOCBD's), and Supplemental Official Lease

Diagrams (SOLD's) will be provided to the OCS regions by the date agreed to by the

Chief, MSS and the appropriate regional official. At the same time, the public will be

advised of product availability through a Federal Register notice published by the MSS. 

(The MSS will advise the public that NAD 83 products are available through the

appropriate OCS Regional Office(s).)

The Chief, MSS, or designated representative(s), will:

! Notify the OSC of needed OB2MIS/TIMS6 revisions within two workdays of

problem identification.

! Chair an annual Team meeting in the third quarter of each FY to develop the

following year's AWP and to address conversion issues and problems.

! Call special Team meetings to address specific problems or issues.

! Notify Team members of a Team meeting not less than one month (four

weeks) in advance of the meeting date.

! Hold the required AWP planning meeting with USGS, Rocky Mountain

Mapping Center (RMMC) not later than the third quarter of each FY. MSS will

obligate all funds to support the MMS/USGS Agreement and AWP at the
 7

 When this document was written, OCSIS was being converted into several major components of TIMS. In Part II,

rather than cite each component, OCSIS and the TIMS components being derived from OCSIS, will be referred to as

"TIMS(O)."

 8

 As used here, "timely manner" means consistent with the MSS meeting an OCS region's sale-related needs.

 9

 NADCON v2.00 is the first version to fully satisfy MMS OCS needs offshore of Alaska and the conterminous U.S. 

NADCON v2.10 is the first version to recognize the recently computed grids for the High Accuracy Reference

Networks (HARN's).

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PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

beginning of each FY.

2.3.4. Offshore Systems Center (OSC). The MMS ability to meet proposed

implementation timeframes, while adequately supporting existing offshore programs, is

predominately dependent on the capabilities of two automated systems--B&B, TIMS

and the Outer Continental Shelf Information System (OCSIS)7. B&B, TIMS is MSS's

primary computational/database system.

The MMS implementation of NAD 83 is a dynamic process, and as such will necessitate

the OSC making changes, revisions, enhancements, etc. to B&B, TIMS in a timely

manner8. These capabilities include, but are not limited to:

! Datum transformations using the North American Datum Conversion

(NADCON) v2.00, or later9

, software.

! Geodesic and rhumb line computations using the "OCS5" programs, and

geodesic line and grid intersection computations using the "OCS8" programs.

! Combined State Seaward Boundary computations using the "OCS2T" and

"OCS3T" programs.

! SOCBD and SOLD preparation.

! Computation of coordinates for NAD 27 leasehold boundary (block boundary)

intersections with the NAD 83 cadastre.

OSC will accommodate valid requests from MSS for B&B, TIMS revisions and updates

on a priority basis. All sale-related requests will be accommodated so as not to cause a

sale delay or cancellation.

Coordinate information in OCSIS is, and shall remain, referenced only to NAD 27. 

OCSIS will be superseded by TIMS; the pre-lease, lease administration, and block and

boundary components of TIMS are scheduled for completion by June 1994, and will

reference both NAD 27 and NAD 83. (See Part II, sections 3.6. - 3.6.2.)

The Manager, OSC will designate one or more Team representative(s) to present

OSC's position on all NAD 83 issues and concerns. Within two weeks after formal
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PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

notification of a Team meeting, OSC will submit issues, concerns, and proposed

agenda items, or negative responses, to the Chief, MSS in writing.

2.3.5. MMS NAD 83 Implementation Team (Team). During conversion to NAD 83, the

Team will meet at least annually to identify and address specific implementation issues

(e.g., High Accuracy Reference Networks (HARN's)). This may require establishing

subcommittees and/or representation from other disciplines on the Team. The Team

will establish the mechanism for addressing these issues at the annual Team meeting

or through telephone or FAX communications between annual meetings.

Each Team representative will comprehensively represent their regional, Headquarters,

or program staff positions on all NAD 83 issues and concerns. When a consensus can

not be achieved on an issue, Team members are expected to develop timely

"compromises" that are in the best interest of the Agency.

2.3.6. Timeframes. Phase I began MMS-wide in April 1991, with the Director, MMS's

approval of the Agency's NAD 83 Implementation Plan. Each OCS Regional Director

will determine their own NAD 83 planning area and/or sale area implementation

timeframes based upon MMS conversion experiences, leased areas, sale activities, and

the 5-Year Schedule.

Timeframes for each OCS region's implementation phases can be found in Figure 2. 

These timeframes were not established as rigid periods of time; they are planning

guidelines. For example, (1) the conversion of the Chukchi Sea Planning Area went

from Phase I to Phase III, omitting Phase II in early 1992; (2) the Gulf of Mexico OCS

Region has indicated that they will not implement NAD 83 until TIMS is complete and

functioning.

OCS Region Phase I Phase II Phase III

Alaska

Atlantic

Gulf of Mexico

Pacific

1991 - 1992

1991 - 1992

1991÷÷÷÷÷÷÷÷÷÷÷÷

1991 - 1993

1992 - 1993

1992

÷÷÷÷÷÷÷÷÷÷÷÷÷÷÷

1993 - 1995

1993 - 1996

1992 - 1997

÷÷÷ until completed

1995 - until completed

Figure 2. Projected OCS regional office NAD 83 implementation timeframes.

2.4. Implementation Plan Phase III

2.4.1. OCS Regions. Each OCS Regional Director will determine the timing for their

OCS region to implement Phase III in planning areas--fully converting to NAD 83. Each

OCS Regional Director will designate one or more regional representative(s) to the

Team. OCS regional Team members will represent a comprehensive regional position

on all NAD 83 issues and concerns. (See Part I, section 2.4.5.) Two weeks after formal

notification of a Team meeting, OCS Regional Directors will submit issues, concerns,
8

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

and proposed agenda items, or negative responses, to the Chief, MSS in writing.

2.4.2. Headquarters and Program Staffs. Until NAD 83 is fully implemented by the

Agency, each Division Chief and Program Director will continue to designate one or

more representative(s) to the Team. Staff Team members will represent the staffs'

position on all NAD 83 issues and concerns. (See Part I, section 2.4.5.) Two weeks

after formal notification of a Team meeting, Division Chiefs and Program Directors will

submit issues, concerns, and proposed agenda items, or negative responses, to the

Chief, MSS in writing.

The OPDC Supervisory Program Analyst will be responsible for ensuring that adequate

resources, as identified by MSS, are available each FY to complete the Agency's

conversion to NAD 83. All funds to support the MMS/USGS Agreement are to be

available within the MSS budget for allocation via purchase order at the beginning of

each FY.

2.4.3. Mapping & Survey Staff (MSS). MSS will continue development of new NAD 83

OPD's and SOBD's until all planning areas have been converted. When requested by

an OCS region, MSS will develop SOCBD's and SOLD's. (See Part II, sections 3.4.

through 3.6. for procedures.)

The Chief, MSS, or designated representative(s), will:

! Notify OSC of needed B&B, TIMS revisions within two workdays of problem

identification.

! Chair an annual Team meeting in the second quarter of each FY to develop

the following year's AWP and to address conversion issues and problems.

! Call special Team meetings to address specific problems or issues.

! Notify Team members of a Team meeting not less than one month in advance

of the meeting date.

! Hold the required AWP planning meeting with USGS, RMMC not later than the

third quarter of each FY. MSS will obligate all funds to support the

MMS/USGS Agreement and AWP at the beginning of each FY.

2.4.4. Offshore Systems Center (OSC). Until NAD 83 is fully implemented in the

Agency, OSC will accommodate valid requests from MSS for B&B, TIMS revisions and

updates on a priority basis. All sale-related requests will be accommodated so as not to

cause a delay or cancellation of sales.

The Manager, OSC will continue to designate one or more representative(s) to the

Team. The OSC Team member(s) will represent the OSC's position on all NAD 83

issues and concerns. (See Part I, section 2.4.5.) Two weeks after formal notification of
9

PART I -- Responsibilities and Timeframes

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Reformatted for the Internet: January 8, 1999

a Team meeting, the OSC will submit issues, concerns, and proposed agenda items, or

negative responses, to the Chief, MSS in writing.

2.4.5. MMS NAD 83 Implementation Team (Team). Until NAD 83 has been fully

implemented in the MMS, the Team will continue to meet at least annually to identify

and address specific implementation issues. This may require establishing

subcommittees and/or representation from other disciplines on the Team. The Team

will establish the mechanism for addressing these issues at the annual Team meeting

or through telephone or FAX communications between annual meetings.

Each Team representative will comprehensively represent their regional, Headquarters,

or program staff positions on all NAD 83 issues and concerns. When a consensus can

not be achieved on an issue, Team members are expected to develop timely

"compromises" that are in the best interest of the Agency.

2.4.6. Timeframes. Planning Area conversion priorities will continue to be determined at

the annual Team meeting. The target date for having all planning areas for Alaska, the

conterminous U.S., and Hawaii converted to NAD 83 is the end of FY 2000. (See Part I,

section 2.3.6.)
 10 See Part II, section 2.1.5.

10

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

3. DATUM REFERENCING

In 54 FR 31737, August 1, 1989, the MMS advised the public that:

! The Agency had been referencing NAD 27 for all offshore coordinate and

areal measurement computations.

! The Agency would cite the appropriate reference datum on pertinent

documents.

Some examples of appropriate datum citations are: 

! "The coordinate values appearing on/in this document were derived using

NAD 27."

! "The coordinate values appearing on/in this document were derived using

NAD 83 (1986)."10

! On maps, place NAD 27 or NAD 83 (1986) directly under the bar scale.

! On non-B&B, TIMS generated SOBD's, add "Datum: NAD 27" directly under

"State Lease No." in the upper right corner of the block.

Ensuring the integrity of datum-dependent data developed, received, and/or

disseminated by the MMS is an Agency-wide responsibility.

3.1. OCS Regions

The OCS regions must:

! Ensure that datum citations are an integral part of all pertinent documents,

maps/graphics, and digital data provided to the public or other Federal/State

government agencies.

! Identify and document the datum of all datum-dependent information held by

the OCS regions.

! Incorporate datum identification into non-national computer systems

containing datum-dependent data.

! Ensure that newly rec1eived data is compatible with existing data.
 11 The regional policies were identified by regional Team representatives at the September 15-17, 1992, Team

meeting.

11

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

Current (1992) OCS regional policies11 for submission of datum-dependent data to the

Agency can be found in Figure 3. 

OCS Region NAD 27 NAD 83 Datum of Survey

Alaska

Atlantic

Gulf of Mexico

Pacific

Yes

Yes

Yes

*

Yes

Yes

Yes

*

Not Required*

Not Required*

Not Required*

Required*

*Only the Pacific OCS Region requires datum-dependent data submissions on the original datum of survey--i.e.,

when NAD 27 is the original survey datum, NAD 27 data is acceptable. The other OCS Regions will accept

transformed data when the transformation method has been identified.

Figure 3. Acceptable survey datums for datum-dependent data received by the MMS.

3.2. Headquarters and Program Staffs

All datum-dependent maps, graphics, digital data, etc. developed and/or disseminated

by Headquarters or program staff offices must include appropriate datum citations.

3.3. Mapping & Survey Staff (MSS)

The MSS must:

! Include a datum citation on all new or revised OPD's, LM's, SOBD's, and

SOCBD's.

! Include a datum citation on all SOLD's.

! Include a datum citation on all datum-dependent special computational and

graphic products developed by the MSS.

3.4. Offshore Systems Center (OSC)

Datum identification must be incorporated into the Agency's national computer systems
12

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

for datum-dependent data.

4. IMPLEMENTATION PLAN UPDATES

The MMS implementation of NAD 83 is expected to be a long-term, dynamic process,

requiring the release of periodic project plan updates. These documents will be

available through the OPDC, the MSS, and the Public Affairs Office in each OCS

region. Notice of availability of the updates will be published in the Federal Register. 

5. INFORMATION TRANSFER

OCS regional, Headquarters, program staff, and OSC Team representatives are

responsible for providing thorough briefings to their respective MMS units. Team

representatives are responsible for training appropriate OCS regional, Headquarters,

program staff, and OSC employees in the use of NAD 83 documents (OPD's, SOBD's,

SOCBD's, and SOLD's) and procedures.

The MSS staff will be available to offices requesting assistance. They will also be

available to confer with other agencies, coastal States, and the public sector concerning

MMS NAD 83 implementation and computational techniques and methodology.

6. ADDITIONAL INFORMATION

Technical NAD 83-related questions and requests for information should be directed to:

Department of the Interior

Minerals Management Service

Chief, Mapping & Survey Staff Boundary Branch

P.O. Box 25165, MS 4421 4011

Denver, CO 80225-0165

Phone: (303) 236-7050 275-7121

As official updates to the MMS NAD 83 Implementation Plan become available, they

can be obtained from the Public Affairs Office in each OCS region or the OPDC in

Herndon, Virginia:
13

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

Minerals Management Service Minerals Management Service

Alaska OCS Region Atlantic OCS Region

Public Affairs Office Public Affairs Office

949 East 36th Ave., Rm. 110 381 Elden St., Suite 1109

Anchorage, AK 99508-4302 Herndon, VA 22070-4817

Phone: (907) 261-4010 Phone: (703) 787-1113

Minerals Management Service Minerals Management Service

Gulf of Mexico OCS Region Pacific OCS Region

Public Affairs Office Public Affairs Office

1201 Elmwood Park Blvd. 770 Paseo Camarillo

New Orleans, LA 70123-2394 Camarillo, CA 93010

Phone: (504) 736-0557 Phone: (805) 389-7520

Minerals Management Service

Office of Program Development 

 and Coordination

Supervisory Program Analyst

381 Elden St., MS 4400

Herndon, VA 22070-4817

Phone: (703) 787-1179
14

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

7. APPENDIX A--BRIEF HISTORY OF THE EVOLUTION OF THE

FIVE NAD 27 OFFSHORE CADASTRES

The Bureau of Land Management (BLM) developed five unique NAD 27-based OCS

cadastres when the offshore program was administered by that Agency. The first three

cadastres to support OCS oil, gas, sulphur, and salt leasing were:

! Cadastre 1 - LM's based on the Louisiana SPCS in a portion of the Central Gulf of

Mexico Planning Area.

! Cadastre 2 - LM's based on the Texas SPCS in a portion of the Western Gulf of

Mexico Planning Area.

! Cadastre 3 - LM's based on the California SPCS in a portion of the Pacific OCS

Region's Channel Islands area.

The BLM believed that since these three States had previously developed LM's defined

by their unique SPCS's, maintaining that system offshore in Federal waters would:

! Reduce confusion since some State leases were transferred to the Federal

Government. 

! Facilitate the resolution of legal issues associated with a common boundary.

! Maintain the status quo for existing litigation.

SPCS's have a major drawback, however. They were designed for use onshore or

nearshore, and not offshore on the OCS. Thus, as the offshore program evolved and

moved further from the shoreline, the limitations of SPCS's became more apparent. For

example, offshore of Louisiana BLM had to use negative coordinates as they proceeded

seaward. Further, the obligatory use of different SPCS's for each coastal State

compounded computational problems.

To resolve these problems, BLM adopted the military's metric based UTM grid system

and OPD's as a new foundation for the offshore cadastre. This worldwide system, may

be used onshore or offshore with equal accuracy, and has a broad zone width. This last

feature was desirable since it decreased the total number of zones needed to cover

large areas. OPD's based on the UTM projection and grid systems are the foundation

for the last two NAD 27 OCS cadastres.

Cadastre 4 is used in those areas of the Gulf of Mexico OCS Region not covered by

LM's. However, this cadastre is not a "pure" UTM-based system. In developing this

cadastre, BLM made three decisions which corrupted the cadastre. Although not

recognized at the time, these decisions adversely affect coordinate and areal

measurement computations:
15

PART I -- Responsibilities and Timeframes

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Reformatted for the Internet: January 8, 1999

! Certain UTM zone boundaries were shifted to eliminate (1) OPD's which depicted

relatively few blocks or (2) fractional blocks along one side of a zone boundary.

! Since LM's were based on SPCS's and used English systems of measurement,

the English systems of measurement would be used on the OPD's.

! UTM zone central meridians were shifted to better facilitate use of the English

systems of measurement in a system designed to use metric measurements.

Cadastre 5 is used in those areas of the Pacific OCS Region not covered by LM's and in

the entirety of the Alaska and Atlantic OCS Regions. Unlike Cadastre 4, this cadastre

was not corrupted. It conforms to definitive UTM parameters and uses both metric

coordinates and areal measurements.
 a

 "Comprehensive Program 1992 - 1997," April 1992.

 b

 The number of OPD's in a planning area which depict shorelines.

 c

 The number of OPD's in a planning area which depict international maritime boundaries.

 d

 Completed OPD's and SOBD's due to regional office. TBD = To Be Determined.

16

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

8. APPENDIX B--PLANNING AREA CONVERSION PRIORITIES

8.1. Sale Related Planning Area Datum Conversion Prioritiesa

|--Approx. # OPD's--| MSS Target

OCS Region/ Sale Sale # Shore- Int. Completion

Planning Area # Date OPD's linesb Bdysc Dated

Alaska

Beaufort Sea 144 12/95 43 10 5 2/95

Chukchi Sea 148 6/96 23 6 7 2/94

Cook Inlet/ 149 9/94 7 7 0 10/93

Shelikof Str.

GOA (Yakutat) 158 8/95 5 4 0 12/94

Hope Basin 159 7/97 12 9 4 9/95

St. George 153 12/96 16 7 0 3/95

 Total Alaska 106 43 16

Atlantic

Mid-Atlantic 164 10/96 24 11 0 11/94

South Atlantic 164 10/96 28 9 2 11/94

 Total Atlantic 52 20 2

Gulf of Mexico

Eastern GOM 151 10/95 24 12 4 TBD

 Total Gulf of Mexico 24 12 4

Pacific

No Planning Areas 0 0 0

 Total Pacific 0 0 0

Total Sale Related 182 75 22
17

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

8.2. Sale Related Official Protraction Diagram 

Datum Conversions,

By OCS Region and Planning Area

OCS Region Planning Area/

Sale Number

OPD’s in Planning Area* National Mapping

Program Maps**

Alaska Beaufort Sea

Sale 144

NR04-01, NR04-02, NR05-01, NR05-02,

NR05-03, NR05-04, NR06-01, NR06-02,

NR06-03, NR06-04, NR06-06(?), 

NR07-01, NR07-02, NR07-03, NR07-04, 

NR07-05, NR07-06, NS04-03, NS04-04,

NS04-05, NS04-06, NS04-07, NS04-08,

NS05-03, NS05-04, NS05-05, NS05-06, 

NS05-07, NS05-08, NS06-03, NS06-04,

NS06-05, NS06-06, NS06-07, NS06-08,

NS07-03, NS07-04, NS07-05, NS07-06, 

NS07-07, NS07-08, NS08-05, NS08-07

1:250K: Teshekpuk,

Harrison Bay, Beechey

Point, Flaxman Island, Mt

Michaelson, Barter Island,

Demarcation Point,

Canadian Quad east of

Demarcation Point

Alaska Chukchi Sea

Sale 148

NR02-02, NR02-04, NR02-06, NR02-08,

NR03-01, NR03-02, NR03-03, NR03-04,

NR03-05, NR03-06, NR03-07, NR03-08,

NR04-03, NR04-04, NS02-04, NS02-06,

NS02-08, NS03-03, NS03-04, NS03-05,

NS03-06, NS03-07, NS03-08

1:250K: Point Hope, De

Long Mts, Point Lay,

Wainwright, Meade River,

Barrow

Alaska Cook Inlet/Shelikof

Str.

Sale 149

NO04-06, NO05-01, NO05-02, NO05-03,

NO05-04, NO05-05, NP05-08 

 

1:250K: Ugashik, Karluk,

Mt Katmai, Shelikof Str.,

Afognak, Iliamna,

Seldovia, Kenai, Kodiak

Alaska Gulf of Alaska

(Yakutat Sub-Area

only)

Sale 158

NO06-02, NO07-01, NO07-02, NO07-03,

NO07-04, NP06-08, NP07-07(?)

1:250K: Bering Glacier,

Cordova, Icy Bay,

Juneau, Middleton Island, 

Mt. Fairweather, Yakutat

Alaska Hope Basin

Sale 153

NQ02-02, NQ02-04, NQ02-06, NQ03-01,

NQ03-02, NQ03-03, NQ03-04, NQ03-05,

NQ04-03, NQ04-05(?), NR02-08,

NR03-07

1:250K: Teller,

Shishmaref, Kotzebue,

Candle(?), Selawik, Baird

Mts(?), Noatak, Point

Hope

Alaska St. George Basin

Sale 153

NN02-02, NN02-04, NN02-06, NN02-08,

NN03-01, NN03-03, NN03-05, NO02-03,

NO02-04, NO02-05, NO02-06, NO02-07,

NO02-08, NO03-03, NO03-05, NO03-07

1:250K: Pribilof Islands,

Samalga Island, Umnak,

Unalaska, Unimak,

Amukta

Atlantic Mid-Atlantic

Sale 164

NI18-01, NI18-02, NI18-03, NI19-01,

NJ18-02, NJ18-03, NJ18-05, NJ18-06,

NJ18-08, NJ18-09, NJ18-11, NJ18-12,

NJ19-01, NJ19-04, NJ19-05, NJ19-06,

NJ19-07, NJ19-08, NJ19-10, NK18-09,

NK18-11, NK18-12, NK19-07, NK19-10

1:250K: Rocky Mount,

Manteo, Currituck Sound,

Chincoteague, Salisbury,

Wilmington, Newark, New

York, Hartford,

Providence 
OCS Region Planning Area/

Sale Number

OPD’s in Planning Area* National Mapping

Program Maps**

18

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

Atlantic South Atlantic

Sale 164

NH17-02, NH17-03, NH17-05, NH17-06,

NH17-08, NH17-09, NH17-11, NH17-12,

NH18-01, NH18-02, NH18-04, NH18-05,

NH18-07, NH18-10, NI17-09, NI17-11,

NI17-12, NI18-04, NI18-05, NI18-06,

NI18-07, NI18-08, NI18-09, NI18-10,

NI18-11, NI18-12, NI19-04, NI19-07

1:250K: Orlando,

Daytona Beach,

Jacksonville, Brunswick,

Savannah, James Island,

Georgetown, Cape Fear,

Beaufort

GOM Eastern GOM

Sale 151

NG16-02, NG16-03, NG16-05, NG16-06,

NG16-08, NG16-09, NG16-11, NG16-12,

NG17-01, NG17-04, NG17-05, NG17-07,

NG17-08, NG17-10, NG17-11, NH16-05,

NH16-06(?), NH16-08, NH16-09, 

NH16-11, NH16-12, NH17-04(?), 

NH17-07, NH17-10

1:250K: Dry Tortugas,

Key West, Miami, West

Palm Beach, Charlotte 

Harbor, Saint Petersburg,

Tarpon Springs,

Gainsville, Apalachicola, 

Tallahassee, Pensacola

*Shading indicates OPD's with shorelines--e.g., NO02-08. (?) indicates OPD's which were not developed for

projected boundary computations prior to NAD 83, but may be required for NAD 83 B&B, TIMS computations. An

OPD may be in more than one planning area and is included in each one, e.g., NR02-08 (Point Hope West) is in

both the Chukchi Sea and Hope Basin Planning Areas. EEZ OPD's are included with adjacent planning areas,

e.g., NS 04-04.

**All map names are 1:250,000-scale USGS National Mapping Program names, unless otherwise noted. In

Alaska the 1:250,000-scale series will be used to develop the OPD shoreline plate, and the 1:000,000-scale series

in the conterminous U.S. Although USGS maps may fall in multiple planning areas, they are only listed once in

this table.
 a

 Recommendations developed at the MMS NAD 83 Implementation Team meeting September 15-17, 1992.

 b

 The number of OPD's in a planning area, including OPD's adjoining EEZ areas, to be converted to NAD 83. If an

OPD is in more than one planning area, it is included in each planning area.

 c

 The number of OPD's in a planning area which depict shorelines.

 d

 The number of OPD's in a planning area which depict international maritime boundaries.

 e

 Completed OPD's and SOBD's due to regional office. TBD = To Be Determined.

19

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

8.3. Non-Sale Related Planning Area Datum Conversions

As Recommended By the MMS NAD 83 Implementation Teama

|--Approx. # OPD's–| MSS Target

OCS Region/ # Shore- Int. Completion

Planning Area OPD'sb linesc Bdysd Datee

Pacific

Southern CA 25 8 4 TBD

Washington/Oregon 24 10 4 TBD

 Total Pacific 49 18 8

Total Non-Sale Related 49 18 8
20

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

8.4. Non-Sale Related Official Protraction Diagram Datum Conversions,

By OCS Region and Planning Area

OCS Region Planning Area/

Sale Number

OPD’s in Planning Area* National Mapping

Program Maps**

Pacific Southern CA NH10-01, NH10-02, NH10-03, NH10-05,

NH10-06, NH11-01, NH11-04, NI09-03,

NI10-01, NI10-02, NI10-03, NI10-04,

NI10-05, NI10-06, NI10-07, NI10-08,

NI10-09, NI10-10, NI10-11, NI10-12,

NI11-04, NI11-07, NI11-08, NI11-10,

NI11-11

1:250K: San Diego, San

Clemente Island, Santa

Ana, Long Beach, Santa

Rosa Island, Los Angeles,

Santa Maria, San Luis

Obispo, Mexican Quad to

complete San Diego

Pacific Washington/Oregon NK09-02, NK09-03, NK09-05, NK09-06,

NK10-01, NK10-02(?), NK10-04, 

NL09-02, NL09-03, NL09-05, NL09-06,

NL09-08, NL09-09, NL09-11, NL09-12,

NL10-01, NL10-04, NL10-05(?), NL10-07,

NL10-08(?), NL10-10, NL10-11(?), NM09-

08, NM10-07

1:250K: Cape Blanco,

Coos Bay, Newport,

Vancouver, Hoquiam,

Cape Disappointment,

Copalis Beach, Cape

Flattery, Salem(?),

Roseburg(?), Canadian

Quad to complete Cape

Flattery, Quad W of

Vancouver

*Shading indicates OPD's with shorelines--e.g., NG14-03. (?) indicates OPD's which were not developed for

projected boundary computations prior to NAD 83, but may be required for NAD 83 B&B, TIMS computations. An

OPD may be in more than one planning area and is included in each one, e.g., NR02-08 (Point Hope West) is in

both the Chukchi Sea and Hope Basin Planning Areas. EEZ OPD's are included with adjacent planning areas,

e.g., NS04-04.

**All map names are 1:250,000-scale USGS National Mapping Program names, unless otherwise noted. In

Alaska the 1:250,000-scale series will be used to develop the OPD shoreline plate, and the 1:000,000-scale series

in the conterminous U.S. Although USGS maps may fall in multiple planning areas, they are only listed once in

this table.
 a

 The number of OPD's in a planning area, including OPD's adjoining EEZ areas, to be converted to NAD 83. If an

OPD is in more than one planning area, it is included in each planning area.

 b

 The number of OPD's in a planning area which depict shorelines.

 c

 The number of OPD's in a planning area which depict international maritime boundaries.

 d

 Completed OPD's and SOBD's due to regional office. TBD = To Be Determined.

 e

 Populate B&B, TIMS with NAD 27 digital data.

21

PART I -- Responsibilities and Timeframes

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8.5. Planning Areas To Be Scheduled 

Later For Datum Conversion

|--Approx. # OPD's--| MSS Target

OCS Region/ # Shore- Int. Completion

Planning Area OPD'sa linesb Bdysc Dated

Alaska

Aleutian Arc 51 13 5 TBD

Aleutian Basin 12 0 6 TBD

Bowers Basin 18 0 3 TBD

Gulf of Alaska

 (except Yakutat) 35 15 4 TBD

Kodiak 19 5 0 TBD

Navarin Basin 9 0 5 TBD

N. Aleutian Basin 13 10 0 TBD

Norton Basin 13 9 5 TBD

St. Matthew-Hall 17 11 0 TBD

Shumagin 18 6 0 TBD

Total Alaska 205 69 28

Atlantic

Caribbean

 Dependencies ? ? ? TBD

North Atlantic 19 8 7 TBD

Straits of Florida 11 5 8 TBD

Total Atlantic 30+ 13+ 15+

Gulf of Mexico

Central GOM 16 6 2 1/94e

Western GOM 13 7 5 1/94e

Total GOM 29 13 7

Pacific

Central California 15 5 0 TBD

Pacific

 Dependencies ? ? ? TBD

Hawaii ? ? 0 TBD

Northern California 16 7 0 TBD

Total Pacific 60+ 25+ 7+

Total Unscheduled 266+ 94+ 43+
22

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

8.6. Official Protraction Diagram Datum Conversions

For Planning Areas To Be Scheduled Later,

By OCS Region and Planning Area

OCS Region Planning Area/

Sale Number

OPD’s in Planning Area* National Mapping

Program Maps**

Alaska Aleutian Arc NL01-01, NL60-03, NM01-01, NM01-02,

NM01-03, NM01-04, NM01-05, NM01-06,

NM01-07, NM01-08, NM02-01, NM02-02,

NM02-03, NM02-04, NM02-05, NM02-06,

NM02-07, NM02-08, NM03-01, NM03-03,

NM03-05, NM58-02, NM58-04, NM59-01,

NM59-02, NM59-03, NM59-04, NM59-05,

NM59-06, NM60-01, NM60-02, NM60-03,

NM60-04, NM60-05, NM60-06, NM60-07,

NM60-08, NN01-07, NN01-08, NN02-06,

NN02-07, NN02-08, NN03-03, NN03-05,

NN03-07, NN59-05, NN59-06, NN59-07,

NN59-08, NN60-07, NN60-08

1:250K: Seguam, Atka,

Adak, Gareloi Island, Rat

Islands, Kiska, Attu

Alaska Aleutian Basin NO01-05, NO01-06, NO01-07, NO01-08,

NO59-08, NO60-02, NO60-03, NO60-04,

NO60-05, NO60-06, NO60-07, NO60-08

N/A

Alaska Bowers Basin NN01-01, NN01-02, NN01-03, NN01-04,

NN01-05, NN01-06, NN02-01, NN02-03,

NN02-05, NN59-02, NN59-03, NN59-04,

NN60-01, NN60-02, NN60-03, NN60-04,

NN60-05, NN60-06

N/A

Alaska Gulf of Alaska

(except Yakutat)

NN06-02, NN06-04, NN06-06, NN07-01,

NN07-02, NN07-03, NN07-04, NN07-05,

NN07-06, NN08-01, NN08-02, NN08-03,

NN08-04, NN08-05, NN09-01, NN09-03,

NO05-02, NO06-01, NO06-02, NO06-03,

NO06-04, NO06-06, NO06-08, NO07-05,

NO07-06, NO07-07, NO07-08, NO08-03,

NO08-04, NO08-05, NO08-06, NO08-07,

NO08-08, NP06-07, NP06-08

1:250K: Seward, Blying

Sound, Taku River, Sitka,

Sumdum, Port Alexander,

Petersburg, Craig,

Ketchikan, Dixon

Entrance, Prince Rupert

Alaska Kodiak NN05-01, NN05-02, NN05-03, NN05-04,

NN05-05, NN05-06, NN05-07, NN05-08,

NN06-01, NN06-03, NN06-05, NO05-04,

NO05-05, NO05-06, NO05-07, NO05-08,

NO06-03, NO06-05, NO06-07

1:250K: Trinity Islands,

Kaguyak

Alaska Navarin Basin NO01-01, NO01-02, NO01-03, NO01-04,

NP01-04, NP01-05, NP01-06, NP01-07,

NP01-08

N/A

Alaska North Aleutian Basin NN03-02, NN03-04, NN04-01, NO03-04,

NO03-06, NO03-08, NO04-01, NO04-03,

NO04-04, NO04-05, NO04-06, NO04-07,

NO04-08

1:250K: Hagemeister

Island, Nushagak Bay,

Naknek, Bristol Bay, 

Chignik, Stepovak Bay,

Port Moller, Cold Bay,

False Pass
OCS Region Planning Area/

Sale Number

OPD’s in Planning Area* National Mapping

Program Maps**

23

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

Alaska Norton Basin NP01-02, NP02-01, NP02-02, NP03-01,

NP03-02, NP04-01, NQ02-07, NQ02-06,

NQ02-08, NQ03-05, NQ03-07, NQ03-08,

NQ04-07

1:250K: St Michael,

Unalakleet, Norton Bay,

Solomon, Nome

Alaska St. Matthew-Hall NO02-01, NO02-02, NO03-01, NO03-02,

NO04-01, NP02-03, NP02-04, NP02-05,

NP02-06, NP02-07, NP02-08, NP03-03,

NP03-04, NP03-05, NP03-06(?), 

NP03-07, NP03-08

1:250K: St Matthew,

Cape Mendenhall,

Kuskokwim Bay,

Goodnews Bay, Baird

Inlet, Nunivak Island,

Marshall (?), Hooper Bay,

Black, Kwiguk, St

Lawrence

Alaska Shumagin NM03-02, NM03-04, NM04-01, NM04-02,

NM04-03, NN03-02, NN03-04, NN03-06,

NN03-08, NN04-01, NN04-02, NN04-03,

NN04-04, NN04-05, NN04-06, NN04-07,

NN04-08, NO04-08

1:250K: Sutwik Island,

Simeonof Island

Atlantic Caribbean

Dependencies

TBD TBD

Atlantic North Atlantic NJ19-01, NJ19-02, NJ19-03, NJ20-01,

NK19-01, NK19-02, NK19-03, NK19-04,

NK19-05, NK19-06, NK19-07, NK19-08,

NK19-09, NK19-10, NK19-11, NK19-12,

NK20-10, NL19-11, NL19-12

1:250K: Chatham,

Boston, Portland, Bath,

Bangor, Eastport,

Canadian Quad to

complete Eastport and

NK19-03

Atlantic Straits of Florida NF17-01, NF17-02, NG17-02, NG17-03,

NG17-05, NG17-06, NG17-08, NG17-09,

NG17-10, NG17-11, NG17-12

1:250K: Ft Pierce, Quads

to cover the islands

between 24EN-28EN by

78EW-80EW, Cuban

Quads to cover 23EN24EN by 80EW-84EW

GOM Central Gulf of

Mexico

NG15-02, NG15-03, NG15-06, NG15-09,

NG16-01, NG16-04, NG16-07,

NH15-08(?), NH15-09(?), NH15-11(?),

NH15-12, NH16-04, NH16-05, NH16-07,

NH16-08, NH16-10

1:250K: Port Arthur, New

Orleans, Breton Sound,

Mobile 

1:100K: Burrwood Bayou 

 

GOM Western Gulf of

Mexico

NG14-03, NG14-06, NG14-09(?), 

NG15-01, NG15-02, NG15-04, NG15-05,

NG15-08, NH14-12(?), NH15-07(?),

NH15-08(?), NH15-10(?), NH15-11(?)

1:250K: Brownsville, Port

Isabel, Corpus Christi,

Beeville, Bay City,

Houston

Pacific Central California NI09-03, NI10-01, NI10-02, NI10-03,

NJ09-05, NJ09-06, NJ09-09, NJ09-12,

NJ10-04, NJ10-05, NJ10-07, NJ10-08, 

NJ10-10, NJ10-11, NJ10-12

1:250K: Monterey, San

Francisco, Santa Rosa

1:100K: Santa Cruz

Pacific Pacific Dependencies TBD TBD

Pacific Hawaii TBD TBD
OCS Region Planning Area/

Sale Number

OPD’s in Planning Area* National Mapping

Program Maps**

24

PART I -- Responsibilities and Timeframes

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Reformatted for the Internet: January 8, 1999

Pacific Northern California NJ09-02, NJ09-03, NJ09-05, NJ09-06,

NJ10-01, NJ10-02, NJ10-04, NJ10-05,

NK09-08, NK09-09, NK09-11, NK09-12, *

NK10-07, NK10-08(?), NK10-10, 

NK10-11(?)

1:250K: Ukiah, Eureka,

Crescent City, Weed(?),

Redding(?), Quad W of

Ukiah

*Shading indicates OPD's with shorelines--e.g., NN03-02. (?) indicates OPD's which were not developed for

projected boundary computations prior to NAD 83, but may be required for NAD 83 B&B, TIMS computations. An

OPD may be in more than one planning area and is included in each one, e.g., NR02-08 (Point Hope West) is in

both the Chukchi Sea and Hope Basin Planning Areas. EEZ OPD's are included with adjacent planning areas,

e.g., NS04-04. TBD = To Be Determined.

**All map names are 1:250,000-scale USGS National Mapping Program names, unless otherwise noted. In

Alaska the 1:250,000-scale series will be used to develop the OPD shoreline plate, and the 1:000,000-scale series

in the conterminous U.S. Although USGS maps may fall in multiple planning areas, they are only listed once in

this table. N/A = Not Applicable. TBD = To Be Determined.
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PART I -- Responsibilities and Timeframes

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Reformatted for the Internet: January 8, 1999

9. APPENDIX C--ACRONYMS & ABBREVIATIONS

AWP - Annual Work Plan

B&B, TIMS - The Block and Boundary component of TIMS; See OB2MIS;

See TIMS

BLM - (U.S. Department of the Interior,) Bureau of Land Management

CA - California

EEZ - Exclusive Economic Zone

FGCC - Federal Geodetic Control Committee

FR - Federal Register

FY - Fiscal Year

GOM - Gulf of Mexico

GPS - Global Positioning System

LM - Leasing Map

MMS - (U.S. Department of the Interior,) Minerals Management Service

MMS/USGS Agreement - April 5, 1991, MMS/Geological Survey (USGS) Agreement

MSS - MMS, OPDC, Mapping & Survey Staff, formerly the Mapping & Survey Group

(MSG)

NAD 27 - North American Datum of 1927

NAD 83 - North American Datum of 1983

NADCON - North American Datum Conversion transformation software

OB2MIS - Offshore Block, Boundary, and MAP/OPD Information

System; See B&B, TIMS

OCS - Outer Continental Shelf

OCSIS - Outer Continental Shelf Information System; See TIMS(O)
26

PART I -- Responsibilities and Timeframes

Originally Released: May 3, 1993

Reformatted for the Internet: January 8, 1999

OPD - Official Protraction Diagram

OPDC - Office of Program Development and Coordination

OSC - Offshore Systems Center

Part II - "Project Plan for Implementing NAD 83 in the Minerals Management Service,

Part II: Technical Aspects of Implementation"

RMMC - (USGS) Rocky Mountain Mapping Center

SOBD - Supplemental Official OCS Block Diagram (also referred to as a "Split Block")

SOCBD - Supplemental Official Composite Block Diagram

SOLD - Supplemental Official Lease Diagram

SPCS - State Plane Coordinate System

Team - MMS NAD 83 Implementation Team

TBD - To be determined

TIMS - Technical Information Management System

TIMS(O) - An all-inclusive reference in Part II to the several TIMS components into

which OCSIS is evolving; See OCSIS

U.S. - United States

USGS - (U.S. Department of the Interior,) Geological Survey

UTM - Universal Transverse Mercator