Re: [Geotools-gt2-users] Calculating zonal statistics for a grid coverage

[Michael B. <mic...@gm...>]

Hello Nick,

I see that Jody has already given some advice about reading the data
source and Andy has chipped in with some good points about vector /
raster issues.

GeoTools includes an unsupported module, gt-jai-tools, which wraps the
ZonalStats image operation from the JAI-tools project:

http://code.google.com/p/jai-tools/wiki/ZonalStats

The ZonalStats operator is very flexible in choice of statistics,
selective inclusion of values etc. So once your data are in GeoTools
you can use that module for analysis. Also as Jody mentioned, Simone
Giannecchini (our coverage module maintainer) has just committed some
code to make ZonalStats available as a normal GeoTools coverage
operation.

I'm one of the authors of the JAI-tools code so if you have any
questions about that end of things I'll try to help. I'm not involved
in the GeoTools wrappers but I'm sure Simone and others will be able
to help there.

Good luck :)

Michael