Seeing a place before the subdivision: USGS historical topographic maps

The source The US Geological Survey's Historical Topographic Map Collection covers maps from 1884 to 2006, every scale and edition, free to view and download through topoView: https://ngmdb.usgs.gov/topoview/ Why they are useful - They show what was there before development: farmhouses (small black squares), schools, churches, cemeteries, mills, rail spurs and roads that no longer exist. - Creeks that have since been channelled or buried appear in their original course. That matters for flooding as much as for history. - Place names change. Vanished communities often survive only on an old quadrangle. How to use it 1. Open topoView, zoom to the place, and click the map location. You get a list of every edition for that quadrangle. 2. Sort by date and download two or three editions as GeoTIFF or PDF. 3. Lay them over a current map. Free GIS tools such as QGIS can do this directly with GeoTIFFs. Reading the symbols USGS publishes the symbol sheet (search "USGS topographic map symbols"). Watch the survey date as well as the print date: a 1960 edition may reflect fieldwork from years earlier, and photorevised editions add changes in purple. Pair it with Aerial photography from USGS EarthExplorer (https://earthexplorer.usgs.gov) for the decades between map editions, and Sanborn maps for the town centre. Our map tool is at https://map.soapbox.community.