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Latitude-Longitude: When looking at a map, consider a rectangle that encloses the area of interest to you. In the United Sates, the absolute values of the maximum latitude and longitude define the upper-left (NW) corner, and the absolute values of the minimum latitude and longitude define the lower-right (SE) corner of that box.

  • Remember latitude should be entered as a positive decimal number for locations in the United States
  • Remember longitude should be entered as a negative decimal number for locations in the United States
  • Try the USGS EarthExplorer system at this web site http://earthexplorer.usgs.gov to help find the approximate latitude and longitude
  • For the best results define the smallest practical latitude-longitude box that includes the area of interest; retrievals from unnecessarily large latitude-longitude boxes (1x1 degree, for example) may yield many undesired sites.

 

Example of a bounding box from Albany, New York (42.6526, -73.7562) in the north and east to St. Louis, Missouri (38.6270, -90.1994) in the south and west:

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