The files presented here are based on U.S. Census Bureau Tiger files. The eight counties that surround Lake Tahoe are divided into a numerous Census tracts that include from 2,500 to 8,000 people. They were taken for the SEDAC web site for Census Data download called DDCarto. They were imported into ARC/INFO, combined to cover the Lake Tahoe area, projected into UTM zone 10 NAD27 and converted to Shape and SDTS file formats.
The original boundary files are available from the U.S. Census Bureau at http://www.census.gov/geo/www/cob/tr.html.
Click here for an interactive Census map of Lake Tahoe vacinity.
The following Census data have been mosaicked together from the 18 7.5-minute quadrangles that cover the Lake Tahoe Basin. The mosaicked files are more convenient for looking at areas throughout the basin or areas on the edge of two quadrangles.
Census data are in UTM NAD27 zone 10 projection. Raw (original) data are in the following projections: data east of 120 degrees longitude are in UTM zone 11 and data west of 120 degrees longitude are in UTM zone 10. It is not possible to combine different projections in Geographic Information System (GIS), therefore, all data have been reprojected into one standard projection, UTM NAD27 zone 10 projection, for the Lake Tahoe Basin.
U.S. Department of the Interior
|| U.S. Geological Survey
|| National Mapping Information
|| Western Regional Geography|
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Last Modified: Thursday, 13-Dec-2012 16:09:16 EST (tm)
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