Grasshopper

algorithmic modeling for Rhino

1/9 arc second IMG files from USGS?

I'm using Elk 2.2.2 and was able to find a 1/9 arc second DEM file (in IMG format) on the USGS National Map of the area of my interest. However, When I try to import the file I always get a domain error no matter what my Lat/Long values are.

Can Elk use these files?

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Replies to This Discussion

Permalink Reply by Nathan Melenbrink on May 17, 2018 at 3:52pm

Hi Kevin, did you ever find a solution to this? I'm able to get the 1/3 arc second data to load, but not the 1/9 data for the same region. I notice that the file structures of the two ZIPs are different, which might be the root of the problem. I can dig into it later, but wondered if anyone else had found a workaround first. 

Permalink Reply by Federico_G on June 4, 2018 at 7:06am

I have the same issue with a geotiff from open topography on another area. I always got issues wit the exact lat and long.Any suggestion anyone?

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