[GRASS-user] Hortonian analysis - current status
mseibel at gmail.com
Thu Aug 27 08:36:41 EDT 2009
Excellent! Those are fantastic. Thanks for the contribution. We are working
on some stream assessments, and I hope to be able to get time to try these
modules. I will be sure to provide feedback.
2009/8/27 Jarek Jasiewicz <jarekj at amu.edu.pl>
> Dear grass users!
> I present next version of tools for hortonian analysis. Source code and
> tutorial are available here:
> Currently following modules are available:
> - r.stream.order: to calculate Strahler, Horton, Shreve and main stream
> (Hack) ordering. That module is almost ready to use
> - r.stream.basins: calculate basins according users input. Read more on web
> - r.stream.distance: calculate downslope distance path and elevation above
> to streams/outlets. That module is in early development stage, but works,
> and results seems good. But it may will change in the feature.
> -r.streams.stats: calculate hortonian statistics is not avilable: maybe in
> next few days.
> All three modules works fine on small dems (up to 20 millions cells). Only
> on powerful machines with at least 2-4GB RAM they handle avarage dems (up to
> 120 M cells). I have no information about largers dems (over 100M cells
> because I haven't so).
> Till I finish my work modules are available only from my web page. After I
> will absolutely sure that everything is OK, add vector capabilities and
> solve problems with massive dems (for LIDAR puropse) I will try to add them
> to GRASS add-ons.
> best regards
> Jarek Jasiewicz
> grass-user mailing list
> grass-user at lists.osgeo.org
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