I have a terrain right on the side of a hill in Mexico. Initially I thought I could get the area from Google Earth, but after a few tests I found out that the area Google Earth calculates is flat, i.e. it does not take into account the undulation and topography of the terrain. This is a problem, because for legal purposes I must find out the actual area of my terrain taking into account the terrain's topography.
Now, I do not know anything about GIS, but digging around Google turned up what looks like a surface volume module of 3D Analyst for ArcGIS. I intend to locate a civil engineer or an expert in geography and have them do it. How do I ask them to do it, and what information if required must I provide to them in order to do that?
The module in question is this one: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00q900000027000000