HEADWATERS ECONOMICS GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: 
Geodataset Name: 		NA_coalflds
Geodataset Type: 		SHAPE
Geodataset Feature: 		POLYGON

GENERAL DESCRIPTION: 
This dataset shows the location of coalfields in western North America.

DATA SOURCE(S):  		U.S. Geological Survey
				BC Geological Survey, Ministry of Energy, Mines and Petroleum Resources
				Yukon Geological Survey, Department of Energy, Mines and Resources
				Alberta Geological Survey
			
US Scale of Original Source Maps:	1:5,000,000
US Date of Original Source Maps:	2001
BC Scale of Original Source Maps:	Unknown
BC Date of Original Source Maps:	Unknown
YT Scale of Original Source Maps:	Unknown
YT Date of Original Source Maps:	2006
AB Scale of Original Source Maps:	1:50,000
AB Date of Original Source Maps:	2006
NWT Scale of Original Source Maps:	
NWT Date of Original Source Maps:	

GEODATASET EXTENT:  		Western North America
 
FEATURE ATTRIBUTE TABLES CODES AND VALUES: 
ITEM			ITEM DESCRIPTION


DATA LINEAGE SUMMARY: 
The US dataset was downloaded from http://nationatlas.gov/ in the Geology section called Coal Fields.  Most of the material for the conterminous United States was collected from James Trumbull's "Coal Fields of the United States, Conterminous United States" map (sheet 1, 1960).  The Gulf Coast region was updated using generalized, coal-bearing geology obtained from State geologic maps.  The Alaska coal fields were collected from Farrell Barnes's "Coal Fields of the United States, Alaska" map (sheet 2, 1961).  An item CoalFieldDescription was added and calculated to "Coal Field - Potentially Mineable" and "Coal Field - Other Uses" based on the Description item in the original layer.
The BC data set is the coalflds layer downloaded from http://www.em.gov.bc.ca/Mining/Geolsurv/MapPlace/geoData.htm.  The item BASIN was retained.
The Yukon data set was procured from Olwyn Bruce of the Yukon Geological Survey.  The item BASINNAME was retained.
The Alberta data set was downloaded from http://www.ags.gov.ab.ca/website/cbm/viewer.htm.  The seven basins were merged together and the item NAME was retained.
All of the above datasets were merged together.

MAP PROJECTION PARAMETERS 
PROJECTION 			ALBERS CONICAL EQUAL AREA
DATUM 				NAD83
UNITS 				METERS
SPHEROID 			GRS1980
PARAMETERS
1st standard parallel		29 30  0.000
2nd standard parallel		45 30  0.000
central meridian		-96 00  0.000
latitude of projection's origin	37 30  0.000
false easting (meters)		0.00000
false northing (meters)		0.00000

DATA SOURCES CONTACT(S): 
Name: 			U.S. Geological Survey
Address:		956 National Center
			Reston, VA  20192
Contact:		Susan J. Tewalt
Phone:			(703) 648-6437
Web site: 	  	http://energy.er.usgs.gov/

Name:			BC Geological Survey, Resource Development and Geoscience Branch
Address:		PO Box 9323 Stn Prov Govt
			Victoria, BC V8W 9N3
Web site:		http://www.em.gov.bc.ca/Mining/Geolsurv/Minfile/default.htm 
Contact Person:   	Barry Ryan	
Phone:   		(250) 952-0418
Fax:			(250) 952-0922	
Email:   		Barry.Ryan@gov.bc.ca       

Name:			Yukon Geological Survey, Department of Energy, Mines and Resources, Mineral Resources
Address:		2099-2nd Ave.
			Whitehorse, YT Y1A 2C6
Web site:		http://www.geology.gov.yk.ca/ 
Contact Person:   	Olwyn Bruce	
Phone:   		(867) 393-7186
Fax:			(867) 393-6232	
Email:   		Olwyn.Bruce@gov.yk.ca     

Name:			Alberta Geological Survey
Address:		4th Floor, Twin Atria Building
			4999-98 Avenue
			Edmonton, Alberta T6B 2X3
Web site:		http://www.ags.gov.ab.ca/ 	
Phone:   		(780) 422-1927
Fax:			(780) 422-1918	
     
HEADWATERS ECONOMICS CONTACT: 
Name:			Headwaters Economics Geographic Data Library
Abbr. Name:		HEGDL
Address:		Headwaters Economics
                        566 Highland St.
                        Helena, Montana 59601
Web site:		http://www.headwaterseconomics.org
Contact Person:   	Patty Gude	
Phone:   		(406)599-7425	
Email:   		patty@headwaterseconomics.org