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*[http://historicalmaps.arcgis.com/usgs/index.html ARCGIS Historical Maps] | *[http://historicalmaps.arcgis.com/usgs/index.html ARCGIS Historical Maps] | ||
::The USGS has put together an interactive site utilizing its historical topographic map collection. Users can simply type in a location and the site will guide you to a place. Human and geologic activity change sites, borders, boundaries, landscapes and the power of this site is that it allows the user to explore a location by comparing maps created at different dates. The user can slide the transparency on maps to compare layers, or drag/drop to re-order maps. | |||
= FAQ = | = FAQ = |
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