Ruidoso 1:100000 Quad Hydrography DLGs

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...数字线划图（Digital Line Graph, DLG）数据是制图信息的数字化表达。地图要素对应的数字线划图数据，源自各类地图及相关……并被转换为数字形式。