FAQ: Why does the Kriging Spatial Analyst tool generate NoData areas in the output raster?
Why does the Kriging Spatial Analyst tool generate NoData areas in the output raster?
The Kriging (Spatial Analyst) geoprocessing tool interpolates a raster surface from points using the kriging method. The tool is usually used to create a continuous surface from discrete data points. In some cases, NoData areas are generated in the output raster surface.
The following are possible causes and associated solutions for the NoData areas in an output of the Kriging (Spatial Analyst) tool:
- Coincident data points
- Remove all but one data point in the coincident location, and run the Kriging tool.
- If the Geostatistical Analyst extension is available, use the Geostatistical wizard to set the method for handling coincidental sample points.
- Another tool from the Geostatistical Analyst extension that can be used is the Empirical Bayesian Kriging tool, which can handle coincident points.
- No data points found in the search radius
- If the Search radius setting is set to Fixed, increase the Distance parameter to ensure at least one data point falls within the search distance, or specify a non-zero minimum number of points, so that when the Kriging tool does not find the required number of points within the specified distance, the search distance are automatically increased until the specified minimum number of points is found.
- If the Search radius setting is Variable, increase the Maximum distance to ensure at least one data point falling within the search distance.
- A mask with NoData areas is used in the Processing Extent or Raster Analysis Environments setting
- In Kriging tool dialog window, click Environments... at the bottom.
- Expand Processing Extent and Raster Analysis. Remove any unwanted processing extent or raster mask.
- Kriging (Spatial Analyst)
- How Kriging works
- Processing Extent (Environment setting)
- Raster Analysis - Mask (Environment setting)
- Setting geoprocessing environments