Lorri A. Peltz and Timothy D. Liebermann
ABSTRACT
Hydrographic-basin boundaries have been delineated on maps published by the U.S. Geological Survey for use in ground-water and surface-water studies. Digital data for basin boundaries at 1:750,000 scale have been compiled from the 1974 Static Ground Water Levels of Nevada, published by the Nevada Division of Water Resources. Data for boundaries at 1:500,000 scale are available for the 11-digit Hydrologic Unit Code (HUC) map, published by the U.S. Department of Agriculture, Soil Conservation Service. Digital data also are available for the 1:250,000-scale 8-digit HUC map, published by the U.S. Geological Survey. Digital data for 1:100,000 and 1:24,000 scales were obtained for some basins by delineating topographic divides on the respective-scale map, using the topographic contours. Because of the variety of scales, each map has a different level of accuracy. The digital data for all five scales are compared and a general statistical evaluation of areas and line lengths is made for each.