Stefan,
I had a look at the sextante classes you included in you sstein branch.
They look promising. There is an easy way to access raster cell values,
and I also had a go trying to adapt one of our plug-ins to use these
classes. It worked. Actually, instead of modifying the plug-in code I
created a method allowing the plug-in to read the cell values from the
sextante layer. I know it's not an elegant solution, but it's the most
practical and quick.
I still have some things I'd like to clarify: 1) to implement symbology
management for raster, would it be needed to modify the sextante
classes? Or can it be done in some other ways? 2) how could be added
support for different raster formats?
And one more dumb question? How can I share files with the list members?
Cheers
Alberto
On 08/02/2010 23:51, Stefan Steiniger wrote:
Hei Michael, Alberto and Larry,
yep. What I was suggesting is to use IRasterLayer and the related
generic classes and basically copy them with a slight name change to
avoid confusion [1]. This way we could develop on raster functionality
based on the sextante interfaces and access classes.
I.e. it was not just about loading raster files, because the sextante
raster file is just a normal tiff image too, but loaded with Pirols
plugin, which is what the Sextante-OJ interface needs as input.
With respect to Albertos question: yes, we may need to update them
from time to time. But i think these classes will not have much
changes in the future.
In case you want to have a look at the classes I did a commit of those
to a new branch: /branches/sstein/
the classes are to be found in
org.openjump.core.rasterimage.sextante.*
stefan
[1] I think I changed only the name of the Sextante class
OpenJUMPRasterLayer to OpenJUMPSextanteRasterLayer , which provides a
way to convert openjump data (raster and vector) in (abstract)
sextante datatypes.
Note, I also add an example plugin that for instance converts a loaded
raster into a vector grid. So you can see how it works
PS: btw another option would be to look into GDMS
Michaël Michaud wrote:
Hi Stefan,
Sorry, my knowledge about raster managment is very poor.
I thought you already added Sextante raster classes (File> Open>
Image raster (Sextante))
Isn't it enough to benefit from Sextante algorithm library ?
Could you briefly explain what is missing in OpenJUMP.
From what you and Alberto said, I understand that OpenJUMP and
AdbToolbox have their own loaders and renderers, but there is no OJ
interface to define how to access raster data in a way independant
from loader implementation (maybe like IRasterLayer from Sextante) ?
Is that the point ?
Michaël
Larry Becker a écrit :
I actually asked a couple of months ago if other people would
accept if
I commit the basic Raster classes used in Sextante. There was
not much
exitement/repsonse ;)
Sorry for the lack of response Stefan. I just haven't had time to
study Sextante, and didn't feel qualified to comment.
Larry
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