asdi.elevation.HYPSOGRAPHY_USGS_1990

DLG's depict information about geographic features on or near the surface of the Earth, terrain, and political and administrative units. These data were collected as part of the National Mapping Program. It is the intention of the Arkansas State Land Information Board to facilitate the dissemination of the 1:100,000-scale Digital Line Graphs.

Data available online through the Arkansas Spatial Data Infrastructure (http://gis.arkansas.gov) . The subject file represents the Arkansas portion of hypsography (contour line) information derived from 1:100,000-scale (""intermediate-scale"") Digital Line Graph data created by the USGS. Digital Line Graph (DLG) data are digital representations of cartographic information. DLG's of map features are converted to digital form from maps and related sources. Intermediate-scale DLG data are derived from USGS 1:100,000-scale 30- by 60-minute quadrangle maps. If these maps are not available, Bureau of Land Management planimetric maps at a scale of 1:100,000 are used. Intermediate-scale DLG's are broken down into five categories: 1. Public Land survey, 2. boundaries, 3. transportation 4. hydrography, and 5. hypsography.

U.S. Geological Survey

None. Acknowledgement of the U.S. Geological Survey and the Arkansas State Land Information Board would be appreciated in products derived from these data.