20240628 10254300 1.0 TRUE Contours - 50-Foot Contours for display at medium-large scales (1:50,000–1:150,000) from The National Map. These contours were generated by EROS (USGS Center for Earth Resources Observation and Science) from the 1/3-arc-second National Elevation Dataset and the National Hydrography Dataset. They cover the continental United States, and can also be found for download at https://topotools.cr.usgs.gov/contour_data.php.