USGS 62k Historic Topo Map
Created By: Boyd
Page Last Updated: October 23rd, 2022 5:10pm
West: 80.7488° East: 69.6769°
Country: United States
State: Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia
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*** Map updated on 10/23/22 to include full coverage of Maine, New Hampshire, New York and Vermont. ***
The US Geological Survey has been the primary agency responsible for mapping the United States since 1879 and this new curated collection includes the oldest topo maps available from the USGS archives. These old maps were drawn at the scale of 1:62,500 with a coverage of 15 minutes (1/4 degree). About a third of the quadrangles in this map were created before 1900 and over half are older than 1910, with the earliest dating from 1884. A total of one thousand eighty nine 1:62,500 quadrangles are included with full coverage of Connecticut, Delaware, Maine, Maryland, Massachussets, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island and Vermont with partial coverage of Virginia and West Virginia. This is an ongoing project and coverage will expand to a larger area in the future.
Generally speaking, the oldest version of each quadrangle was used unless there were problems. For example, some of the earliest maps were incomplete, with large blank areas. Newer maps were used for these.
Original .tif files were downloaded from the Historical Topographic Map Collection, cropped to remove the collar and re-projected as Web Mercator. These source files were processed at a resolution of 4.8 meters/pixel which preserves the full detail of the original USGS 300 dot-per-inch scans.
As you zoom out, the view switches to the oldest available USGS 250k maps (mostly from the 1950's). At smaller scales a simple basemap is shown.
Garmin devices do not offer any serious support for raster imagery, so this map is only available in the free boydsmaps web app. Garmin's "custom maps" (.kmz) raster format only supports a total of 100 tiles at 1024x1024 on most devices, however this map would contain about 125,000 tiles if processed in that format!
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