# maybe you can share a tutorial about terrain topology with NASA files. I worked once with topology of Valparaiso cliffs...

Commenting post [56](/?blog/2014-056): maybe you can share a
tutorial about terrain topology with NASA files. I worked once with
topology of Valparaiso cliffs with Google earth but the results are very
poor (cliffs look like hills) A method with a better accuracy would be
nice.