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Re: [udig-devel] Changing pixel transparence for a raster
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The behavior you are seeing using the raster symbolizer is correct, as
far as the SLD OGC spec is concerned. You cannot use the raster
symbolizer to make an RGB color transparent but you can map single
band values to transparent via the colormap element.
Notice that what you are looking for, which is usually called
colormasking could be implemented as an extension of the raster
symbolizer.
Simone.
-------------------------------------------------------
Ing. Simone Giannecchini
GeoSolutions S.A.S.
Owner - Software Engineer
Via Carignoni 51
55041 Camaiore (LU)
Italy
phone: +39 0584983027
fax: +39 0584983027
mob: +39 333 8128928
http://www.geo-solutions.it
http://simboss.blogspot.com/
http://www.linkedin.com/in/simonegiannecchini
-------------------------------------------------------
On Wed, Jun 3, 2009 at 4:51 PM, Karthi<karthi.sivalingam@xxxxxxxxx> wrote:
> Hi,
>
> It(both color and opacity) is working with single band (grey) images.
> But I want same effect RGB images.
> Since it is possible the two overlapping images can hide either (please see
> the attached image).So in these cases we used to set opacity for the
> overlapping dark areas
>
>
> Thanks and Regards,
> S.Karthi
>
> -----Original Message-----
> From: udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
> [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Jody Garnett
> Sent: Wednesday, June 03, 2009 5:01 AM
> To: User-friendly Desktop Internet GIS
> Subject: Re: [udig-devel] Changing pixel transparence for a raster
>
> We have a couple colormap examples in the geotools test cases; I am
> not sure if they cover transparency or not. Can you be more specific
> about not working? Is the color map having an effect at all? Or is it
> just not working for transparency...
>
> Jody
>
> On Wed, Jun 3, 2009 at 1:24 AM, Karthi <karthi.sivalingam@xxxxxxxxx> wrote:
>> Hi,
>>
>> I have tried to change the xml. I used ColorMap element, but it is not
>> working.I am using 1.2M3.
>>
>>
>>
>> Thanks and regards,
>>
>> S.Karthi
>>
>> ------------------------------
>>
>>
>>
>> Message: 2
>>
>> Date: Tue, 2 Jun 2009 08:58:46 +0200
>>
>> From: Jesse Eichar <jesse.eichar@xxxxxxxxxxxxxx>
>>
>> Subject: Re: [udig-devel] Changing pixel transparence for a raster
>>
>> To: User-friendly Desktop Internet GIS
>>
>> <udig-devel@xxxxxxxxxxxxxxxxxxxxx>
>>
>> Message-ID:
>>
>> <6bfc9c520906012358t6e5fdc42q172a47118ddaa838@xxxxxxxxxxxxxx>
>>
>> Content-Type: text/plain; charset="utf-8"
>>
>>
>>
>> I dont think this is exposed in the UI right now. I think a SLD needs to
> be
>> specified for the raster. The XML view can be used to update the SLD used
>> by the layer. (SLD stands for Styled Layer Descriptor). I know that uDig
>>
>> 1.2 has support for GridCoverage SLDs but I am not sure how far the
> support
>> extends in uDig 1.1
>>
>>
>>
>> Jesse
>>
>>
>>
>> On Mon, Jun 1, 2009 at 6:15 PM, Karthi <karthi.sivalingam@xxxxxxxxx>
> wrote:
>>
>>
>>
>>> Hi,
>>
>>>
>>
>>>
>>
>>>
>>
>>> Can we display a raster with few pixels are transparent? For whole
>>
>>> image we can do it by opacity. But can we change the transparency of a
>>> pixel?
>>
>>>
>>
>>>
>>
>>>
>>
>>> Thanks and Regards,
>>
>>>
>>
>>> S.Karthi
>>
>>>
>>
>>>
>>
>>>
>>
>>
>>
>> _______________________________________________
>> User-friendly Desktop Internet GIS (uDig)
>> http://udig.refractions.net
>> http://lists.refractions.net/mailman/listinfo/udig-devel
>>
>>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
>
>
