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I am running an IDW on a data set that represents point values of water current speed. I would like to run the IDW only within the water area of another shapefile that shows the shape of the water body. So far I have only been able to keep the IDW to the XY extents (a square) of the data points, not within the waterbody shape. Any ideas about how to do this would be very helpful

closed as unclear what you're asking by PolyGeo Nov 10 '17 at 5:47

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • Welcome to GIS SE! As a new user be sure to take the Tour to learn about our focussed Q&A format. What GIS software are you using? – PolyGeo Nov 10 '17 at 4:43
  • Run IDW and get results in the XY extent as before, and then clip the output with your water body. Seem like this should get you what you are after. – ZrSiO4 Nov 10 '17 at 7:14