Using extents in modelbuilder

Question

Hi All

I have a set of rasters that represent different regions. I want to run the same set of geoprocessing tasks on each raster.

In modelbuilder, you can use a list of files as input to a geoprocessing task and associate each one with a different output.

I can do that bit fine. My problem is that each output raster needs to have a specific extent. I can set the extent environment variable, for each process, to be a list that contains the different extents I require, but when I run the model, everything just defaults to the first extent in the list.

Am I doing something wrong? Am I trying to do something that can't be done?
Or should this approach work?

Many thanks for any ideas.
Andy Hulbert
British Geological Survey

JohannesHachmann1 · Answer

I have the exact same problem. Thank you very much to post a workaround to the issue.

ESRI is most disappointing for not fixing this bug. This bug has been around for as long model builder exists. It should be a really easy fix yet they don't bother.. #monopoly #coorporategreed #ESRIsucks

I wish I had never gotten addicted ArcMap and that qGIS had been around earlier.

HarryMoultrie · Answer

Hi

Did anyone solve this issue? I am using a model to run hotspot analysis for each of 52 districts. I would like to specify the processing extent (raster analysis mask) for the density surface output for each district rather than the default convex hull.

Any ideas?

Thanks,

harry

AbgailGleason · Answer

Hello,

I found this thread because I am having a similar issue trying to use extents in Modelbuilder.  I have looked at the examples posted, but I'm wondering if for my case there may be an easier solution.  I have a set of rasters that should each represent a 1 x 1 degree cell.  I could use a list to denote each extent, as noted in the example, but I may have several thousand rasters to work with.  Since I know each output should be exactly 1 x 1 degree, is there a way within modelbuilder, or a Python script, to set the processing extent to be 1x1 degree each time? 
Thank you very much.

Regards, 
Abby