Kriging Extent Problems

ReneeHuset — Fri, 06 Apr 2012 15:52:01 GMT

Hi--

I'm working with the geostatistical wizard and having issues getting kriging predictions to extend throughout my study area. Currently, I'm working with a point file for California, and though the points are distributed throughout a large portion of the state, they do not extend to the N/S and E/W borders of the state, leaving a few areas without observations. When I run a kriging model with these data, the output extent is a polygon that covers only the area between the furthest north and south points and between the furthest east and west points, leaving out a fair amount of the state. I understand the logic behind the extent I'm getting as an output, but I still need a kriging surface that includes the areas currently left out of the calculation. How do I get this? I've tried going through the geoprocessing environments and editing my processing extent, but have had no luck.

Any tips? Perhaps I'm missing something obvious...

Thanks,
Renee

Re: Kriging Extent Problems

EricKrause — Fri, 13 Apr 2012 16:42:23 GMT

The default extent of a geostatistical layer is the rectangular extent of the input points. If you want to change the extent, right-click the layer in ArcMap's table of contents, and choose "Properties". Go to the Extent tab, and you can define a different extent (like the extent of California).

For more information about changing the extent and clipping a geostatistical layer, see the link below. Skip down to steps 12-20 in the section titled "Create a surface using the default options."

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Exercise_1_Creating_a_surface_using_default_parameters/0031000000p0000000/

If you have any further questions about geostatistics, you'll get the quickest response by using the Geostatistical Analyst Forum:

http://forums.arcgis.com/forums/100-Geostatistical-Analyst

Good luck, and I hope this helped.

topic Kriging Extent Problems in Spatial Statistics Questions

Kriging Extent Problems

Re: Kriging Extent Problems