LandView® 5 Metadata
LandView 6 Metadata
U.S. Census Bureau
Census 2000 Demographic Data
These data were prepared from the SF1 state files. The SF1 Technical Documentation [PDF] documents the quality and source of the data.
Historical population and housing unit counts for states and counties
The 1970, 1980, 1990 population and housing unit counts were derived from the Census USA Counties 1998 CD-ROM. Please refer to the Guide to the USA Counties CD-ROM for further technical information regarding the quality and source of these data.
MARPLOT® Census Demographic Layer Grouping
The state, county, and minor civil divisions layers in the Census Demographic Layer grouping of MARPLOT were created from generalized boundary files. They are available along with metadata from Cartographic Boundary Files.
The Indian Areas, Urban Areas, Congressional Districts (106th), places, census tracts, census block groups, and ZIP Code Tabulation Areas (ZCTAs) layers were created from Census 2000 TIGER/Line® files.
MARPLOT Census 2000 TIGER/Line Layers Grouping
These map layers were created from Census 2000 TIGER/Line files.
Environmental Protection Agency (EPA)
Please see the EPA Geospatial Index Library
U.S. Geological Survey (USGS)
Geographic Names Information System
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Source: U.S. Census Bureau
Last Revised: Thursday, 26-Jan-2012 15:38:32 EST