# Piece together out image/world file URI, so it looks like so:įullurl = url + 'usgs_drg_' + image.lower() + '_' + image + '_' + image + '/o' + image + '.' + ext Home = '//share/Imagery/EastTexas/TOPOs/24k/' # Data is actually stored at the internet archive, with a URI like so: # the tif, tfw, and fgd (metadata), then moves them to new home. # For each 24K quad in the list, it gets both # This script fetches raster images (DRGs) from the web using an os.system call to wget
#Download usgs map archive#
They are filed nicely on the server at the Internet Archive and the Python script below, in conjunction with wget, fetches tons of 'em quickly and easily: import os, shutil, string, time
They are collared, but I had access to GlobalMapper, which has a nice function that removes collars easily (and surely there are other ways to deal with those). What about the FREE 24K geotiff DRGs available through the Libre Map Project? All 24K DRGs for all 50 states are available there. It’s not in our interests to force them to take protective measures and close this avenue.Īlso don't overlook snail mail, it's high latency but has almost limitless bandwidth:
If you use this technique, please be gentle. I don't know if it still works, but a couple of years ago I hacked together a method for downloading the US Seamless National Elevation Dataset in bulk that might work for topo raster maps too.
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