Dependencies?
Hello Michael,
Back with some basic questions again (never used go before) - I am getting the following message when trying to use the script:

Does this mean I do not have the dependencies? I did install kingpin.v2 by running o get gopkg.in/alecthomas/kingpin.v2 , but I do not know if I have to clone your other repo? Is there particular location that needs to be in?
Also - is the command to run this simply go run main.go <input image location> ?
As always - huge thanks!
BTW - i did run go get -u github.com/fogleman/fauxgl as mentioned in that repo - and it is installed as

PS: I tried renaming the folder to remove the alphanumerics, it still throws the error
This is an issue with the latest Go version.
https://blog.golang.org/go116-module-changes
You can run this as a workaround:
go env -w GO111MODULE=auto
@fogleman as always, thanks for solving the issue.
It is working! I am amazed by this code. I am taking DEMs from USGS website - The code only takes JPG or PNGs, right? Can tiffs be imported directly, since that is the format they give the DEMS in? I can probably convert them - I believe they have a utility. In any case - thanks!