I am trying to interpolate air pollution data that is displayed in 1x1 Km points in ArcGIS. I am having two issues:

  1. When I try to interpolate using IDW, the software freezes at 94% "building search tree," and I have had not been able to produce an IDW surface
  2. When I try to interpolate using the spline method, a raster is executed but with extreme negative (-91) and positive (82) values that are not within my data range (0-17)

closed as too broad by PolyGeo Sep 24 '16 at 22:45

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. 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 where you will see that there should be only one question asked per question under our focussed Q&A format. – PolyGeo Sep 24 '16 at 22:44