This is regarding extracting Z coordinate from topography, (may be I am repeating the same question, but in my situation the answer is not working from previous discussions). In short, I have gone through some of the previous discussion and tried to extract the Z coordinate from topography with the given X and Y coordinates, so that I place Revit families at right place in Z axis. I tried to get Z coordinate from the topography, but i am only able to extract only one value everywhere that is 3700 (please see image below). In simple words, I need Z coordinate of topography with the given X and Y coordinate. Can somebody help me, thanks in advance.