SRTM files (.hgt) import

My goal with Grasshopper / Elk is to be able to import SRTM files (.hgt) into rhino as a surface.

Any tutorials, advice or sample files that you could point me to it would be much appreciated.

Thank you.

Replies to This Discussion

Permalink Reply by oliver von Malm on April 15, 2016 at 3:17am

When you import using Elk, you get an array of points. they are branched in x or y direction.

These points you can use to make a degree 3 curve through them. Then you can simply make a loft surface through these curves.(right click "flatten" on curve output)

BUT be careful, it will take a very long time to do the loft. So I reccommend first rebuilding the curves with less control points making sure they all have the same amount. Also take only every 10th curve to do the loft for the beginning.

Permalink Reply by Dylan Burns on April 20, 2016 at 6:15am

Thank you for the response. I am new to Rhino (coming from a SolidWorks background)

I am still trying to do the very basic import of the .hgt file into ELK. I am not sure of the "visual code" to do this. The programming looks similar to what I've seen in Labview. If you have any of these basic script files for importing data in ELK that you could direct me to as a reference, that would be great.

Thank you

Permalink Reply by jegb on December 31, 2016 at 12:15am

The sTopo object just requires the file path where the hgt file is located. These files can be downloaded from here : nasa SRTM just disable the solver and let the surface object to visualize the surface, as you can see the profiler takes 27s to process that tile.

In addition you may need to clean up that file, in this case seems that some values are offset.