Digital Line Graphs (DLGs) - Large Scale
收藏U.S. Geological Survey2026-04-23 收录
下载链接：
https://www.usgs.gov/centers/eros/science/usgs-eros-archive-digital-line-graphs-dlgs-large-scale?qt-science_center_objects=0#qt-science_center_objects
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资源简介：
Large-Scale (7.5-minute) DLGs correspond to the USGS 1:20,000-, 1:24,000-, and 1:25,000-scale topographic quadrangle maps. They are primarily cast to the Universal Transverse Mercator (UTM) projection system, but some are cast to the State Plane coordinate system. They are referenced to either the North American Datum (NAD) of 1927 (NAD27) or the NAD of 1983 (NAD83).
提供机构：
Earth Resources Observation And Science Center
