NorthStarUAS/ImageAnalysis

SRTM requests do not work

Closed this issue · 3 comments

njwitthoeft commented

Hello,

I am attempting to run process.py on a dataset. The FTP server the srtm data is pulled from does not appear to be active. Any tips?
image

clolsonus commented

Hi Nicholas,

Yes I noticed recently that the usgs.gov site has been extremely unreliable for downloading SRTM tiles. There is another site: https://bailu.ch/dem3/ that seems to be working better, so I just pushed a code change to switch the download source.

If this still gives you trouble, I've also been able to download the tiles manually and move them to /var/tmp (where the code caches them). If the file is already there, the code won't try to download it again.

Hope that helps ... there's more nuance to discover with optimizing for your specific camera and different matching strategies, and then later possibly cleaning up outliers that slip through, so feel free to ask questions as you go and I'll do my best to help out.

njwitthoeft commented

This change worked great to solve that issue. I have been modifying as I go to solve small problems. I am running on a Windows environment. Is there a place you'd like me to keep track of the necessary changes?

clolsonus commented