Terrain Ruggedness Index Phyton code

[LlorençCastell_Fabregues]

Hello!

Does anyone know how to get the code to calculate the terrain ruggednes index (TRI, Riley 1999) using python in arcgis 10.1. I have no knowledege about python code...

thanks for the help!

[DanPatterson_Retired]

What did you rule out in a web search?  There are numerous possibilities using

terrain ruggedness python

as a search phrase.  For example

http://gis4geomorphology.com/roughness-topographic-position/

so please indicate your research, those links, what you tried and what you found deficient or that you are in need of help with

[LlorençCastell_Fabregues]

Thanks for the answer, I knew this website, but this is only an apporximation, I would like to know the entire python code for the TRI, to do some tests amd modifications in the code.

thanks

[DanPatterson_Retired]

What code do you have? there are other links as well.

You could re-implement Jeff Jenness's tool for ArcView 3.x at

http://arcscripts.esri.com/details.asp?dbid=14156

changing from Avenue to ArcPy and Python would work.

I don't know what you mean by an approximation... the references and interpretations of TPI are well documented on the website and reference published literature.

Or are you want a pure python implementation?  If so, you should indicate:

• what moving window algorithm you are using
• what algorithms you are using for the various steps

This will simplify suggestions and clarify what deficiencies are not covered by the existing interpretations.

[NeilAyres]

And the link posted by ObiDan is pretty well explained in terms of what to do in the raster toolbox / raster calculator.

Before getting into the details of coding this in python, why not do it by hand a few times and experiment there.

There is a lot of help here and at python.org and many others on python coding.