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:
When more than one point appears at the same location, the Kriging tool is unable to determine the exact point to use for interpolation. Consequently, the output raster presents NoData values in the pixel areas where there are coincident points. The following are possible solutions for this issue:
The data points within a search radius are used to interpolate the raster surface using the Kriging tool. When there are no data points in the specified search radius of a location, NoData values are generated in the output raster surface. The following are possible solutions for this issue:
For more information about the Search radius setting, refer to the following web help page, ArcMap: Kriging.
The area with NoData values in the mask is not processed in the Kriging tool, or is masked out in the output raster surface. To check if a mask is used in the Processing Extent and Raster Analysis environment, follow the instruction provided below: