Climate divisions: 1991 National Climatic Data Center. Includes Average temp (F) with standard deviation and Average precipitation (in) and standard deviation.
| Unzip into \mapdata\database\US\climate_div. |
Physiographic Provinces: Fenneman, N.M., and Johnson, D.W, 1946, Physical divisions of the United States. There are codes for 8 major divisions, 25 provinces, and 86 sections representing distinctive areas having common topography, rock types and structure, and geologic and geomorphic history.
| Unzip into \mapdata\database\US\fenn_prov |
Geology King: Digital version of King's 1974 geologic map of the United States.
| Unzip into \mapdata\database\US\geology_king |
Geologic map: Generalized Geologic Map of the Conterminous United States at the US National Atlas.
| Unzip into \mapdata\database\US\geology_nat_atlas |
Precipitation: Average annual precipitation in the contiguous United States for the climatological period 1961-1990. It was created from the Parameter-elevation Regressions on Independent Slopes Model (PRISM) which was developed by the Spatial Climate Analysis Service at Oregon State University. 1:2,000,000 scale.
| Unzip into \mapdata\database\US\precip |
USGS 24K Quad: Names and locations of the 1:24K 7½' topographic quadrangles.
| Unzip into \mapdata\database\US\quads24K |
