If you do not know- just GIS
The most common answers in my GIS lab are:
1) Try GDAL.
2) Reproject your data.
3) Do you really need GIS to do that?
Worst GIS question.
Q) Where is my data?
A) Wherever you saved it.
18 Choosing DEM in France? Dec 18 '15
14 Account for bridge overpasses in a ground DEM to allow for water flow under the overpass Apr 20 '14
10 How to install GDAL and QGIS on a Raspberry Pi? Oct 6 '14
8 Setting in memory workspace in ArcPy? Oct 9 '15
7 Account for bridge overpasses in a ground DEM to allow for water flow under the overpass May 13 '14
7 Costs and requisites when hiring aerial LiDAR survey Sep 30 '14