Title:
	CHARLES. MASSACHUSETTS.
West Bounding Coordinate:
	-71.5479171
East Bounding Coordinate:
	-69.9994726
North Bounding Coordinate:
	42.8431901
South Bounding Coordinate:
	42.0348206
Place Keyword Thesaurus:
	U.S. Department of Commerce, 1983, Codes for Identification of Hydrologic Units
	in the United States and the Caribbean Outlying Areas (Federal Information
	Processing Standard 103): Washington, D.C., National Institute of Standards and
	Technology.
	Place Keyword:
		MASSACHUSETTS
	Place Keyword:
		CHARLES
	Place Keyword:
		01090001
Source Citation Abbreviation:
	RF3
	Originator:
		U.S. Environmental Protection Agency
	Title:
		Reach File Version 3
	Publication Date:
		19970622
	Beginning Date:
		19900401
	Ending Date:
		19970622
	Source Contribution:
		reach codes, network flow direction, stream names
	Source Scale Denominator:
		100000
	Type of Source Media:
		online
	Calendar Date:
		Not Applicable
	Source Currentness Reference:
		date range for completion of RF3 cataloging units
Source Citation Abbreviation:
	GNIS
	Originator:
		U.S. Geological Survey
	Title:
		Geographic Names Information System Oracle Database
	Publication Date:
		unpublished material
	Beginning Date:
		Not Applicable
	Ending Date:
		Not Applicable
	Source Contribution:
		names for reaches and areal water bodies
	Source Scale Denominator:
		Not Applicable
	Type of Source Media:
		online
	Calendar Date:
		199903
	Source Currentness Reference:
		custom extract from the GNIS databases
Source Citation Abbreviation:
	centerlines
	Originator:
		U.S. Geological Survey
	Title:
		centerlines
	Publication Date:
		unpublished material
	Beginning Date:
		Not Applicable
	Ending Date:
		Not Applicable
	Source Contribution:
		artificial paths through 2-dimensional streams and other water bodies
	Source Scale Denominator:
		100000
	Type of Source Media:
		online
	Calendar Date:
		1997
	Source Currentness Reference:
		date when processing was complete
Source Citation Abbreviation:
	250K CU boundaries
	Originator:
		U.S. Geological Survey
	Title:
		1:250,000-scale cataloging unit boundaries
	Publication Date:
		unpublished materials
	Beginning Date:
		Unknown
	Ending Date:
		Unknown
	Source Contribution:
		updated CU boundaries
	Source Scale Denominator:
		250000
	Type of Source Media:
		online
	Calendar Date:
		Not Applicable
	Source Currentness Reference:
		Unknown
Source Citation Abbreviation:
	State supplied CU boundaries
	Originator:
		The states of CT, DE, FL, KY, MN, NC, OK, SC, WV, WA, OR, ID, MT
	Title:
		state supplied CU boundaries
	Publication Date:
		unpublished materials
	Beginning Date:
		Unknown
	Ending Date:
		Unknown
	Source Contribution:
		updated CU boundaries
	Source Scale Denominator:
		100000
	Type of Source Media:
		online
	Calendar Date:
		Not Applicable
	Source Currentness Reference:
		Unknown
Process Description:
	During interactive editing to synchronize the NHD basic features and RF3
	double-prime data, analysts may have left potential errors uncorrected in the
	source data. The standardized analysts comments follow. The Process Date is the
	last date of interactive CU editing.
	Process Date:
		19980704
	Analysts Comments:
		-71.721850382645954,42.095011592303116,Missing DLGF Feature(s)
	Analysts Comments:
		-71.990337919869731,42.763453953282166,Misc. Error
Process Description:
	Initial Release built in 9 steps, excluding flow QA/QC: 1. Convert RF3 to RF3
	double prime. This batch operation processed Reach File version 3 to delete
	duplicate reaches, reassign reaches to the correct cataloging unit, validate
	geographic names assigned to reaches against data from the Geographic Names
	Information System (December 1996 extract), apply updates supplied by the
	States of California and Arizona, redelineate reaches based on the standards
	used for the National Hydrography Dataset, and identify inflow/outflow points
	where transport reaches entered and exited waterbodies. 2. Create artificial
	paths. Using waterbodies from the features data and inflow/outflow points
	extracted from RF3 double prime, this process automatically generated the lines
	used to delineate artificial paths within waterbodies using the ARC/INFO GRID
	routine. 3. Blind pass. This batch step conflated RF3 double prime reaches, and
	transferred reach information (reach code, reach date, name, stream level, and
	flow relationships), to the features. It also integrated the artificial paths
	generated in the previous step with the other features, built reaches on the
	artificial paths, and assigned geographic names to waterbodies (February 1995
	extract). 4. Quadrangle-based visual pass. During this interactive step,
	analysts ensured that the data developed in the previous batch processes
	conformed to reach delineation rules and that reaches were assigned to the
	appropriate cataloging unit. Batch procedures identified and developed a list
	of possible errors. Using the list, software presented each case to analysts to
	make appropriate edits to the data. Analysts recorded notes where repairs could
	not be made; these notes are encoded in the cataloging unit digital update
	units under a separate process description. 5. Build superquads. After the
	quadrangle-based visual pass was complete, all quadrangles that cover all or
	part of each cataloging unit using were paneled into a superquad. In this batch
	process, reaches that cross quad boundaries were corrected to conform to reach
	delineation rules. 6. Cataloging unit-based visual pass. Like the
	quadrangle-based visual pass, analysts ensured that reaches conformed to reach
	delineation rules. Batch procedures identified and developed a list of possible
	errors. (Errors not detected by the software may continue in the data.)
	Analysts examined each error, and corrected the data. Analysts recorded notes
	about repairs that could not be made, and other errors in the data; these notes
	are encoded in the cataloging unit digital update units under a separate
	process description. 7. Central quality assurance/quality control. This step
	(1) confirmed that integrity checks were performed successfully during the
	visual pass activity, and (2) assessed statistics gathered during the earlier
	processes to determine if additional review was needed. A check of data from
	the cataloging unit-based visual pass was run in batch; any data that did not
	pass the procedure were reviewed interactively. If substantive changes were
	required, the data were reprocessed using procedures (as required) described in
	previous steps. The edited data then were rechecked using the central quality
	assurance/quality control process. 8. Data preparation and database load. This
	batch procedure performed final processing to the data emerging from the
	quality assurance/quality control step. Some of the activities include
	assigning the final reach codes, building waterbody reaches, adding final
	artificial paths in waterbodies, and implementing any recent changes in
	standards for the National Hydrography Dataset. The spelling of geographic
	names were replaced from the March 1999, data extract from the Geographic Names
	Information System. Following this procedure, reaches, features,
	characteristics, geographic names, and relations were loaded into the database
	that holds the National Hydrography Dataset. 9. Extract distribution copies of
	data. Data for a cataloging unit were extracted from the database, and
	converted into an ARC/INFO workspace containing coverages and other files
	related to the National Hydrography Dataset. Data available in the Spatial Data
	Transfer Standard format were developed from the workspaces. The workspaces,
	and the Spatial Data Transfer Standard-formatted files, were made available to
	the public. QA/QC of the flow relationships was deferred to a future process.
	Process Date:
		1998
	Source Used Citation Abbreviation:
		RF3
	Source Used Citation Abbreviation:
		GNIS
	Source Used Citation Abbreviation:
		Centerlines
	Source Used Citation Abbreviation:
		250K CU boundaries
	Source Used Citation Abbreviation:
		State supplied CU boundaries
	Source Used Citation Abbreviation:
		NHD basic features
	Source Produced Citation Abbreviation:
		NHD Reaches