[GRASS-user] Ussage of new i.* modules in Grass70

Markus Neteler neteler at osgeo.org
Thu Jun 11 01:37:31 PDT 2015

On Thu, Jun 11, 2015 at 10:01 AM, Huub Munstege <hmunstege at yahoo.com> wrote:
> Dear GRASS community,
> Hello, I am thrilled to find a number of promising modules under 'imagery'
> incorporated in the standard GRASS70 version. Specifically the
> "evapotranspiration calculation" modules have our special interest. Weren't
> they before addons?

Yes, that is right.

> However I have some troubles to go through the complete calculation. The
> explanations on the manual pages are very (too) basic.

Agreed - we hope to find volunteers to contribute. But there is a
starter which may be helpful for you:

Evapotranspiration mapping with Landsat 5TM in GRASS GIS

> For example, I got
> stuck at the "sensible heat flux calculation" that demands the "aerodynamic
> resistance to the heat momentum". I supposed an average value that I found
> on the web and created with r.mapcalc a raster with that value. But finally
> I got a raster with only 0 values.
> Would it be possible to create a Wiki for this evaporation module with some
> examples? Or could someone direct me where I can get detailed advice?

A wiki page would be excellent. Feel free to generate it, it is a
community wiki.
Searching, I just found this stub page:


Maybe a good starting point for further editing.



> Thanks,
> Huub
> Huub Munstege
> Bamako
> Rép. du Mali
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