If I
were more fluent (and felt more confident) in java I'd sponsor by
coding, but my java skills are very basic, and geoserver is imho a
pretty complicated project. It's true I did some java coding, and even
used JAI, but I'm more from a python world, and my java programs are so
to say a bit pythonic in nature :) It was JAI that got me into java, not
java that got me into JAI. So the only support for me to offer is live
testing of cutting edge features, which I apparently already do :)
Cheers,
Vincent.
Simone Giannecchini wrote:
> Ciao Vincent,
> sorry to answer with such a delay, but we are quite busy these days.
> This email is of interest for anybody who's interested in styling
> coverage using a WMS+SLD with RasterSymbolizer
> Please, read below.
>
> On 1/9/07, Vincent Schut <[EMAIL PROTECTED]> wrote:
>> Hi all,
>>
>> I am encountering problems when trying to apply an sld with
>> rastersymbolizer to my coverages. It's a bit hard to really find out
>> what is wrong, but it seems styling does not like geotiffs (or vice
>> versa). I'll try to give a summary of what I tried and hope it rings a
>> bell somewhere...
>>
>> - Applying a style (like dem.sld, raster.sld, or a customized
version of
>> one of those) *does* work on the supplied gtopo30 sample raster;
>
> I confirm that :-).
>
>> - Applying a style (idem) on my custom coverage does *not* work; the
>> raster gets rendered in grayscale, whatever I try. This raster is a
>> single band, tiled, Int32 geotiff, no colortable;
>> - Applying a style (idem) on a geotiff version (non-tiled, uint16, 1
>> band, no colortable) of the gtopo30_sample (created with
gdal_translate)
>> does *not* work, neither does a baseline tiff with tfw file version;
>> - Applying a style to a fresh copy of the gtopo30 sample dataset
>> (created new dir with these files, created new coverageDataset, create
>> new Coverage) *does* work;
>>
>> This is what I could think of to narrow down the problem, and leads me
>> to the following conclusion: styling does not work for tiff files. I
>> might be wrong and it sounds kind of illogical (why would it not work
>> for tiffs, but work for gtopo30 rasters, while I suppose that the
>> rendering chain is basically the same except for the file reader...),
>> but I have no idea how to investigate this any further. So I hope some
>> of the imaging/wcs guru's can shed some light on this (and fix it, I
>> hope :)).
>>
>
> <<Where we are now>>
> Ok, here is where we are with raster symbolizer.
>
> Honestly, the actual support for SLD+RasterSymbolizer is quite poor.
> It came out as a quick (real quick) hack for a live demonstration we
> had to give back in April 2006 and it was tested only on a few
> sources, between the others gtopo30 (data type SHORT) and arcgrid
> (data type FLOAT). Hence no surprises it does not do his job on some
> different data types.
>
> <<Where we want to go>>
> We are putting together in the background some test-cases in order to
> improve the RasterSymbolizer support. We aim to implement most part of
> what's in the SLD specification, even if the minimum goal is to have
> channel selection and color map working on most Java datatypes (int,
> float, short. byte).
>
> About timing:
> I am willing to put on this a certain amount of volunteering time
> (well, to be honest we are already doing the preparation work in the
> background as a volunteer effort we already have some the ColorMap SLD
> thing pretty much working).
>
> I have seen various people active on the mailing list and interested
> in this feature. So my idea/wish/suggestion is why don't we do
> something like I have seen doing on other OS projects and we launch
> like a sponsorship program for needs like this?
>
> This could be an interesting test-case. There would be a proposal for
> an implementation and there would people could act as sponsorship
> giving some money, or giving some help with developing and or testing.
> This should allow us to achieve more for the projects in a more
> controlled fashion and hopefully in less time than having sparse
> separate efforts.
>
> What do people think about this? Am I completely crazy?
>
>
> Ciao,
> Simone.
>
>
>> Some additional info: using sun jdk 1.5.0-09, jai and jai-imageio from
>> cvs (synced yesterday), geotools (2.3.x branch) from svn (yesterday),
>> geoserver svn trunk from yesterday, deployed in tomcat-5.5.
>>
>>
>> Cheers from a bit desparate Vincent (I /do/ need raster styling...).
>>
>>
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