Related Links
GIS Links...
UP 419 Projects:
National Spatial Data Infrastructure (NSDI)
Databases - Local
Databases - National
Topologically Intergrated Geographic Encoding
and Referencing - TIGER Files (US Bureau of the Census)
Origin: GBF/DIME (GeoBase File/Dual Independent Mapping and Encoding)
and DLG (Digital Line Graph); scale 1:100,000; low accuracy
Contents: street segments (centerlines) with address ranges,
political and statistical boundaries, zip codes
Digital Line Graph (DLG)
Extracted from 1:100,000 and 1:24,000 map sheets
Includes: 1:2,000,000 transportation, hydrology, political boundaries;
1:100,000 transportation, hydrology, public land survey system,
political boundaries
Digital Elevation Model (DEM)
Generated from: existing contour maps (scanning),
by photgrammetic analysis of stereo aerial photos, or stereo
satellite data
Available in the following scales: 1 degree, 30 minutes, 15 minutes,
7.5 minutes
Digital Orthophoto Quads (DOQ)
Digital aerial photography - rectified
Digital Raster Graphics (DRG)
Digital 7.5 minute maps
Land Use/Land Cover - Bureau of Land Management
Compiled from 1:58,000 infrared aerial photography; mapped in 1:250,000
scale
Contents: political boundaries, hydrologic units, federal land
ownership, census subdivisions
Digital Satellite Imagery
Data - International
GIS WWW Sites
ArcIMS - Internet Map Server
|