----

# Revision and Product Generation Software

### Fact Sheet 076-99 (May 1999)

----

 || Background || Capabilities || Availability || Information ||

----

|  |
|--|

The U.S. Geological Survey (USGS) developed revision and product generation (RevPG)software for updating digital line graph (DLG) data and producing maps from such data. Thissoftware is based on ARC/INFO, a geographic information system from Environmental SystemsResource Institute (ESRI). RevPGconsists of ARC/INFO Arc Macro Language (AML)programs, C routines, and interface menus that permit operators to collect vector data using aerialimages, to symbolize the data onscreen, and to produce plots and color-separated files for use inprinting maps.

### Background

The USGS mission includes meeting the mapping requirements of various Federal, State, andpublic users. Through the National Mapping Program, the USGS has developed digital tools andtechniques to accomplish this mission. In the 1970's, the USGS began to digitally capturegraphics as points, lines, and polygons, using numeric codes to represent their attributes. Thefiles generated in this manner are called DLG's. Recently, a means was sought to update theseand other vector data sets using digital orthophoto quadrangle (DOQ) images. DOQ's arehigh-altitude aerial photographs that have been scanned and geographically corrected. The USGSdeveloped RevPG software to collect and revise DLG data using a DOQ image as an onscreenbackdrop, and to make updated maps from these data.

|| Top || Main Table of Contents || 

### Capabilities

RevPG has the following primary capabilities:

- loading and registration of DLG and DOQ images,
- tools to edit DLG data to reflect changes observed in the DOQ,
- symbolization of elements derived from their numeric attributes,
- query functions and queued edit functions,
- feature conflict detection and resolution, and
- options for electrostatic plots and Scitex film plots.

### Availability

Under a Cooperative Research and Development Agreement, the USGS and ESRI have recentlycompleted porting RevPG to several Unix environments. The system requirements areARC/INFO  6.1.1, 7.0.2, or later versions; DG/UX, SunOS/Solaris, HP/UX, AIX, IRIX, orUltrix/OSF operating systems; and a minimum of 28 megabytes of RAM and 21 megabytes ofdisk space, along with 100 megabytes of swap space.

A limited number of CD-ROM's containing RevPG will be made available on request.

### Information

Complimentary copies of RevPG on CD-ROM are available. To request a copy, contact:

USGS Information Services, MS 317Box 25286, Denver Federal CenterDenver, CO  80225Telephone:  303-202-4200 Fax:  303-202-4693

RevPG can also be retrieved on the Internet through  geography.usgs.gov/html/revpg.html.

For more information about RevPG, contact:

USGS Mid-Continent Mapping CenterRevPG System Manager1400 Independence Rd., MS 706Rolla, MO  65401Telephone:  573-308-3580Fax: 573-308-3652

For information on these and other USGS products and services, call 1-888-ASK-USGS,or visit the general interest publications Web site on mapping, geography, and related topics at erg.usgs.gov/isb/pubs/pubslists/.

For additional information, visit the ask.usgs.gov Web site or the USGS home page at www.usgs.gov.

----

| Top | Main Table of Contents| MappingPublications| Eastern Region Geography | Geography Home |

----

*Any use of trade, product, or firm names is for descriptive purposes only and does notimply endorsement by the U.S. Government.  This document has undergone official review andapproval for publications established by the National Mapping Discipline, U.S. GeologicalSurvey. Some figures have been modified or added to improve the scientific visualization ofinformation.*

----

U.S. Department of the Interior — U.S. Geological Survey — 509 National Center, Reston, VA 20192, USA **URL:***http://mac.usgs.gov/mac/isb/pubs/factsheets/fs07699.html* — **Contact:**[email protected]**Page Maintainer:** USGS Eastern Region Geography**Last modified:**   10:51:30 Thu 19 Feb 2004 — USGS Privacy Policy and Disclaimers— Accessibility