How to accelerate a process using Model Builder or Python

Question

Hello Geonet community. Please send me your thoughts to the question below.

I have to calculate a single indicator (.e.g Morans I) for multiple tiles within a study area. What I did so far was to insert all tiles (30) in Model Builder and then copy and paste the "Morans I" tool 30 times, one for each tile.The only thing that needs to be done is to change the name of the output file in each case.

Since the whole process is time consuming especially if I have 60 or 90 tiles, please let me know if there is a way to accelerate this process either by creating the same model in Python or in Model Builder.

Thanks

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EfstathiosMargaritis · Answer

Finally what I needed was not related to iterators but the "list of values" ArcGIS Help (10.2, 10.2.1, and 10.2.2) option in the model builder builder. Iterators are useful only in case of multiple inputs.

The list of values allows multiple inputs and produces the respective number of outputs providing also the output name.

It is very useful!

curtvprice · Answer

Multiple outputs can be created by an iterator at each iteration by uniquely naming the outputs using model variables in the string. In this case instead of model elements I'm using the built-in variables "workspace" (environment workspace) and "n" (0...n count set at each iteration step).

%workspace%\output%n%

This is covered in the help on iterators. (Note iterators do not work in Python, they are just a Model Builder thing.)

There is a bug in 10.2 that makes this not work for some iterators when run as a tool that is fixed in 10.3. This does work fine when the model is run from edit mode though.

Bug in Modelbuilder iterators when run as tool‌

EfstathiosMargaritis · Answer

I tested all the iterations and unfortunately none of them can produce multiple outputs. Only the iteration of "multivariate" can accept multiple inputs, but it has only one output. If somebody can give me a feedback for this it would be very useful, as I have spent so many hours looking for the solution.

Thanks