Via The Map Room, a key to (mostly) obsolete symbols found on US topographic maps dating from the 1890s to 1920s. Creative Commons license, so they’re freely usable as long as you link back to the page.
Other posts in the Topographic Maps series
- Free Soviet Military Topographic Maps Of Europe And Asia
- Updated USGS 24K Topographic Maps From The US Forest Service
- Identify And Download USGS 24K Topographic Maps In Google Earth
- Mexican National Atlas
- The USGS Seamless Data Distribution System
- Topographic Maps, Satellite Photos And Vector Data For Israel And Jordan
- Free Digital Geographic Data For Canada
- Google Earth Library Now Open
- Google Maps With A Topographic Overlay
- News About “Hey What’s That” Panorama And Viewshed Site
- Two Google Mapplets From The “Hey What’s That” Site
- Free 10-Meter UTM SDTS 24K DEMs
- USAPhotoMaps: Additional Capabilities
- Downloading USGS Topo Maps In GeoPDF Format, And The GeoPDF Plug-In
- Downloadable US Bathymetric And Fishing Maps
- Full Index Of 1:250K US Army Topographic Maps
- Downloadable Updated NOAA Raster Navigation Charts
- Reproject NOAA BSB Raster Navigation Charts And Export Them In TIFF Format
- Topographic Map Symbols for Historic Topographic Maps
- List Of Map Products From the USGS
- New GeoPDF Features
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