[GRASS-user] Re: Hydroligics in grass

[Michael Barton]

Yes. We've looked at jgrass. It was rather quiescent when we started  
out work, but has been re-energized recently.

I agree that it would be nice to have the Java-based "Horton machine"  
modules available for the GRASS community. However, as is the case  
with all truly open source projects, contribution to GRASS is  
voluntary. Moreover, all are free to use GRASS code. But as long as  
they comply with the requirements of the GPL, there is no requirement  
that they contribute back to the GRASS project. On other hand,  
diversity in software development approaches can be a very healthy  
thing. Finally, for anyone interested in porting some of these Java  
modules back to GRASS I mention a potentially interesting idea. Java  
or any other language can work with GRASS (In fact part of the work my  
team is doing involves linking up Java-based ABM with GRASS). However,  
the current and future versions of GRASS are being optimized to work  
especially nicely with Python, including the ability to automatically  
generate a GRASS GUI for any Python script. Object oriented Python has  
a lot of structural and syntactic similarities to Java. It might not  
be to hard to port some of these modules to Python. Just a thought to  
toss out there.

Michael



On Dec 12, 2009, at 10:01 AM, grass-user-request at lists.osgeo.org wrote:

> Date: Sat, 12 Dec 2009 08:02:13 -0800 (PST)
> From: Rich Shepard <rshepard at appl-ecosys.com>
> Subject: Re: [GRASS-user] Re: Hydroligics in grass
> To: "grass-user at lists.osgeo.org" <grass-user at lists.osgeo.org>
> Message-ID: <alpine.LNX.2.00.0912120759560.4434 at salmo.appl-ecosys.com>
> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
>
> On Sat, 12 Dec 2009, Michael Barton wrote:
>
>> That said, we've done a lot of testing in my lab of the ability of  
>> these
>> (and other modules like r.flow) to simulate overland flow. We've  
>> had the
>> best results with r.watershed with the new multi-flow direction (MFD)
>> algorithm implemented in GRASS 6.5 and 7.
>
> Michael,
>
>   I saw a reference to jgrass in an earlier thread. I've not yet  
> looked
> closely at it but it apparently has modules lacking in GRASS for
> precipitation-runoff calculations. Have you or your students looked at
> jgrass?
>
>   Ideally, it would be nice to have all the additional capabilities  
> of jgrass
> incorporated into (C)GRASS.
>
> Rich