A geographic information system was used to develop maps of slope and aspect data for the Lake Tahoe basin of California and Nevada. The maps were pro- duced at 1:100,000 scale by using digital-elevation data derived from 1:24,000-scale maps. The maps show slope (steepness) and aspect (compass-direction) data for the basin. Classes for slope data were set as follows: 0 percent, >0 to 2 percent, >2 to 5 percent, >5 to 10 percent, >10 to 15 percent, >15 to 20 percent, >20 to 30 percent, >30 to 50 percent, and >50 to 100 percent. Classes for aspect data were limited to the eight points of the compass (north, northeast, east, southeast, south, southwest, west, and northwest) and level land.
Additional publication details
USGS Numbered Series
Slope and aspect classifications of Lake Tahoe Basin, California and Nevada
1 over-size sheet, scale 1:100,000 (1 inch = about 1.6 miles).