Hi, I

Your water has holes. SRTM data has holes and you must fix them first before you can import the elevation data.Harald Kraft has posted some messages related to this giving a procedure (what includes a Python program) that allows you to edit your SRTM data and correct it.I'have used his procedures and H3 program last week and it works perfectly.Search for SRTM and you will find a bunch of good information.RegardsJJLobo

I downloaded the program srtmfill from www.3dnature.com/srtmfill.html as suggested by Colin.Simple with perfect results.Richard.

Hi JLobo, I