Hi Michael
thanks for the answer
Yes. I your right. I was wrong to make a comparision. Indeed my idea was to
only to demostrate that OpenKLEM can be
a good integration of Sextante.
Sextante still is a valid set of tools for raster analysis. The problems
are only to some tools which are bugged
(strangely only with OpenJUMP, neither Kosmo nor GvSIG - the same Sextante
version)
Regarding OpenKLEM tools,.
A good 50% are generic raster tools that should be used together/before any
analysis (raster calculator, vector to raster, hystogram, etc)
We have them in Sextante but, as I wrote, some of them in Sextante are
buggy and some in OpenKLEM are more evident and easy to use
Regarding raster capability.
Both OpenKLEM and Sextante rely on RasterImageLayer and use the same
corresponding low level jars.
The difference comes from the wrappers of the raster data to a grid model
and the algorithms for analysis:
Sextante uses wrappers and algorithms located into the distribution
(sextante.jar
and sextante-algorithms.jar) (*)
OpenKLEM has its own raster wrappers and algorithms (**)
Best regards
(*) Stefan did a good job to port Sextante raster wrapper structure in OJ
(OpenJUMPSextanteRasterLayer).
It should be refine in some point.
For Instance an year ago some users observed a shift of the point
coordinates of the profile tool integrated into OJ base (which was using
OpenJUMPSextanteRasterLayer ). The plugin had to be rewritten in order to
use RasterImageLayer class
(**) OpenKLEM wrappers/algorithms development traces back from the
experience of raster tools in AdbToolbox, a project derived from OpenJUMP,
which is still sponsorized by the Italian m inistry of the environment
http://www.pcn.minambiente.it/mattm/adb-toolbox/ (in Italian)
2018-08-24 23:36 GMT+02:00 Michaël Michaud <m.michael.mich...@orange.fr>:
> Hi Peppe,
>
> It is very promising. OpenKLEM seems a good extension for OpenJUMP.
>
> Also it is nice that you could reduce dependencies. I think that a
> separate extension could be OK as it offers quite specialized methods
> (compared to my usage), but as we do not have an easy plugin mechanism to
> add extensions through the GUI, I'm fine if you include it in the PLUS
> distro.
>
> Not sure I understand correctly the comparison with Sextante : do you
> suggest to replace Sextante ? Or is it just to demonstrate that OpenKLEM
> adds new useful capabilities compared to Sextant.
>
> I'm a bit lost when it comes to raster capabilities. Does OpenKLEM relies
> on the same low-level libraries as Sextante (jai ? common-imaging ? imageio
> ?), does it rely on the same raster driver as Sextante (RasterImageLayer ?)
> or does it has its own ?
>
> Thanks,
>
> Michaël
>
>
>
> Le 24/08/2018 à 18:40, Giuseppe Aruta a écrit :
>
> Hi Jumpers
> OpenKLEM is a set of tools for basic raster and hydrological analysis
> http://ojwiki.soldin.de/index.php?title=Plugins_for_OpenJUMP
> #Raster_Analysis.
>
> One of our member, Alberto De Luca, has been involved on OpenKLEM
> development. The software is used by Prof. Roberto Rossi in his course Gis
> Applications in Hydrogeology (University of Padua -
> https://didattica.unipd.it/off/2017/LM/AV/AG0062/000ZZ/AG01122459/N0).
>
> In the last 2 months, in agreement with Alberto and Roberto, I reworked
> OpenKLEM source code to reduce the depencies of OpenKLEM to external
> libraries (mostly OpenDocumet ones). And to make a copy of working OpenKLEM
> smaller in size and connected only to OpenJUMP plus libraries.
>
> This reduced OpenKLEM setup from 8 files(2 core files + 6 OpenDocuments
> onse)-7 Mb to 2 core files-1 Mb.
>
> My proposal in this mail is to integrate OpenKLEM to OpenJUMP PLUS.
>
> These are the advantages and integration with OpenJUMP. And a comparison
> Sextante:
>
> 1) Raster instrumentation enrichment
> the hydrographic analysis tools in OpenKLEM increases the offer of
> Sextante's raster instrumentation
>
> 2) Basic raster tools:
> Sextante has a more extensive set of basic raster instrumentation. But
> some of these have unresolved bugs (due to scarce users). Such as the
> "Sextante> Basic Hydrological Analysis> Sink Fill" tool. The equivalent
> OpenKLEM tools seem to work properly.
>
> 3) Availability of the source code.
> OpenKLEM: The raster wrappers used in OpenKLEM are integrated into one of
> the two installation files. The source code is available for any changes
> / inspections.
> Sextante: The source code of the wrapper and gui of Sextante (sextante.jar
> and sextante-gui.jar) integrated in OpenJUMP (ver 1, I believe) is not
> available (unless Stefan still saves a copy). GvSigCE has a recent
> version (2014) of Sextante still subject to developmen untill 2017t. I
> tried to recompile t it for OJ and found more dependencies to GvGIG
> libraries. I suspect that by now the two Sextante (OJ and GvSIGCE are
> fork)
>
> 4) Users
> Sextante. Apart from me I do not know other users who regularly use
> Sextante
> OpenKLEM. It is used in an annual university course in Padua
>
>
> Documentation: There are some papers and thesys about the usage of
> Kinematik Local Excess Model (KLEM, the hydrographic model used by
> OpenKLEM). In Italian.
> I can resume the basics and try to make a brief documentation about the
> tools, in English.
>
> Source code. I can integrate OpenKLEM source code into OpenJUMP repository
>
> Copyright: GNU General Public License. Alberto, you can correct me ;)
>
> In this folder you can find OpenKLEM, its source code and the instruction
> to setup:
> https://sourceforge.net/projects/opensit/files/Openjump/OpenKLEM/
>
> I hope I have been brief and exhaustive. Waiting for your opinions
>
> Best regards
>
> Peppe
>
>
>
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