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Georeferencing: Difference between revisions
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::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. | ::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. | ||
*[http://historicalcharts.noaa.gov Historical Charts from NOAA] | |||
*[http://mrdata.usgs.gov/geology/state/ Geological maps by state - USGS] | |||
*http://geonames.usgs.gov/pls/gnispublic USGS Geographic Names Service] | |||
= FAQ = | = FAQ = | ||