topic Re: Communicating between a sub model and parent model? in ModelBuilder Questions

Communicating between a sub model and parent model?

SimonWebster — Fri, 09 Feb 2018 04:16:06 GMT

Hi All,

I have a scenario where I have a set of shapefiles, and a set of rasters, and I need to clip each raster with each shape file.

For example:
Raster 1 is clipped with Shapefile 1

Raster 2 is clipped with Shapefile 1
Raster 3 is clipped with Shapefile 1
Raster 1 is clipped with Shapefile 2
Raster 2 is clipped with shapefile 2, etc.

I've had a read here: http://desktop.arcgis.com/en/arcmap/10.3/analyze/modelbuilder/integrating-model-within-a-model.htm but I'm not quite getting it.

I'm quite lost with where to start putting the two together. As in, does the clip go in the parent model, or the sub model? What needs to be parameterised?

Re: Communicating between a sub model and parent model?

DuncanHornby — Fri, 09 Feb 2018 15:26:04 GMT

Have a look at this discussion over on GIS SE. It gives you an example of how to pair names using model builder.

Re: Communicating between a sub model and parent model?

ChrisDonohue__GISP — Fri, 09 Feb 2018 16:02:33 GMT

Since it appears two Iterators will be needed, one way to approach this would be to employ 3 models: 1 each for the iterators and a connecting model where the first iterator model would be linked to the second iterator model. In this scenario, probably the best place to put the Clip would be in the model with the second iterator.

A different approach that may work would be to employ Lists. I have not done much with this approach myself, but it looks promising.

ArcGIS Help 10.1

Chris Donohue, GISP

Re: Communicating between a sub model and parent model?

AbdullahAnter — Fri, 09 Feb 2018 20:16:10 GMT

How many raster that you want to clip and how many shape files will be used ?

Re: Communicating between a sub model and parent model?

SimonWebster — Wed, 14 Feb 2018 09:20:43 GMT

Thanks. That's fairly much what I needed

Re: Communicating between a sub model and parent model?

SimonWebster — Wed, 14 Feb 2018 09:25:02 GMT

You're right, this is a method that would work. That said I rather like the idea of building an iterative method that is somewhat more resilient to upstream changes. For example, if we introduce another category as policy changes, then we go from 9 items, to 12. In this case an iterator that can cycle through the rasters (or polygons for anyone using that search term in future) would be able to adapt to that approach, where a list would require manual intervention.

Still, good suggestion and a method I wasn't aware of. Thanks.