The collection includes all scales and all editions of the topographic maps published by the USGS since the inception of the topographic mapping program in 1879. The historical maps are part of the USGS Historical Topographic Map Collection―a project that was launched in 2011. Going forward, Esri will be updating the map collection regularly to keep pace with work by the USGS staff who are continuing to scan their historical maps. ![]() ![]() In this update, 1,227 new maps were added to the collection and 530 maps were replaced with better-quality images. ![]() Previously available only as printed lithographic copies, high-resolution images of these maps are freely available online and can be downloaded as georeferenced TIFFs for use in web maps, geographic information systems (GIS), and other applications. USGS Historical Topographic Map CollectionĮsri’s USGS topographic map collection now contains 177,061 historical quadrangle maps dating from 1882 to 2006.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |