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Author Topic: seamless USGS topos  (Read 2279 times)


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seamless USGS topos
« on: December 01, 2011, 11:02:05 AM »
With the recent Nov. 1, 2011 change in the seamless.usgs.gov server, I am having trouble finding the equivalent USGS site to work with adjacent quadrangle TOPOs in order to  make a seamless raster map that covers part of two adjacent USGS quads. I have tried the suggested sites (nationalatlas.gov, earthexplorer.usgs.gov, and nationalmap.gov), but haven't had any luck. I can download a single quad, but haven't been able to specify adjacent quads to make a custom raster map using G-raster. I used USAPhotoMaps to download adjacent quads, but these are jpegs, and wanted to compare the same area using geotiff files, which supposedly might be a bit better, according to Leszick P. Any ideas??


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Re: seamless USGS topos
« Reply #1 on: December 01, 2011, 12:31:50 PM »

Has DEMs by quad name, also DRGs and DLGs by quad name.  You'd need software to combine them though.
« Last Edit: December 01, 2011, 12:34:22 PM by Seldom »


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Re: seamless USGS topos
« Reply #2 on: December 01, 2011, 03:02:51 PM »
I use Globalmapper to download USGS DOQ's from MSRMaps.com. Has always seemed easier than the seamless site to me. Unfortunately that won't help if you don't have Globalmapper though.