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I know about USGS and USDA have DEM files but they are in small blocks, and I need the whole country. The closest that I've been with solving this is finding this website that contains all the files that I need but I can't download cause there is a limit of 15gb to download. Moreover, I would like to have the whole country in one file.

Do you know where to find it? Preferably 30m resolution?

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  • You would probably need at least 250 GB of free space to even download and unzip this data. – Kotebiya Mar 22 '18 at 17:34
  • is the limit daily? annually? happy to help crowdsource this with you if it gets you to your goal. – albert♦ Mar 22 '18 at 17:36
  • @Kotebiya this is not a problem. – rolo Mar 23 '18 at 14:24
  • @albert thanks!! I think the limit is at the time. I was thinking in preparing a python script to webscrape everything. But I don't know how to get the list of files. – rolo Mar 23 '18 at 14:25
  • for....each of the 62 pages of results? – albert♦ Mar 23 '18 at 14:51
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You could try the National Contours file. You could also try using an FTP program such as filezilla to retrieve these rasters.

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  • I think contour files doesn't work for me because I need to calculate slopes after getting elevation data. The FTP address seems super useful though! I'll give it a try and post if it worked. Thanks! – rolo Mar 23 '18 at 21:52
  • Ended up downloading all of them through filezilla. Thanks! – rolo Mar 28 '18 at 19:09

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