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R: R: [udig-devel] Udig 1.1.1 problems to read sample value in geotiff 16 bit
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The data type is always different, in all my geotiff. Look, I think that I
have understood the problem: if I invoke raster.getSampleFloat(...) the
problem is solved (for the attached geotiff), but how can i have the right
data type, to invoke raster.getSample(...) or raster.getSampleFloat(...).
Perhaps java.awt.image.DataBuffer.TYPE_... is wrong?
Ciao
Pa
-----Messaggio originale-----
Da: udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
[mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] Per conto di andrea
antonello
Inviato: martedì 10 febbraio 2009 15.53
A: User-friendly Desktop Internet GIS
Oggetto: Re: R: [udig-devel] Udig 1.1.1 problems to read sample value in
geotiff 16 bit
Hi Pasquale,
I don't have lots of time right now, but very quickly:
- in your getSample method did you check if the called method enters the
right type?
- did you check whether the geoRes you get as Gridcoverage2d is of type
rendered (for visualization) or geophisical view? I assume you will need the
geophisical one.
Does this help you a bit further?
Ciao
Andrea
On Tue, Feb 10, 2009 at 3:42 PM, Pasquale Paola <pasquale.paola@xxxxxx>
wrote:
> This is my core code:
> ILayer layer = geoOpt.getLayer();
> GridCoverage2D geoRes = null;
> /*
> * List<IGeoResource> bobobo =
> layer.getGeoResources(); for
> * (IGeoResource item : bobobo) {
> GridCoverage geo =
> * item.resolve(GridCoverage.class, new
> NullProgressMonitor());
> * geoRes = (GridCoverage2D) geo;
> item.getInfo(new
> * NullProgressMonitor());
> *
> * if (geoRes != null) break; }
> */
>
> geoRes = (GridCoverage2D)
> layer.getGeoResource().resolve(
> GridCoverage.class, new
> NullProgressMonitor());
>
> Raster raster =
> geoRes.getRenderedImage().getData();
> String sample =
> getSample(raster.getSample(i, j, z), dataSampleType);
>
> ----------------------------------------------------------------------
> ------
> ------------------------------------------------
>
> /*******/
> private static String getSample(Object sample, int type)
> {
> String result = "";
> try
> {
> switch (type)
> {
> case java.awt.image.DataBuffer.TYPE_BYTE:
> result = ((Byte)
sample).toString();
> break;
> case java.awt.image.DataBuffer.TYPE_DOUBLE:
> result = ((Double)
> sample).toString();
> break;
> case java.awt.image.DataBuffer.TYPE_FLOAT:
> result = ((Float)
> sample).toString();
> break;
> case java.awt.image.DataBuffer.TYPE_INT:
> result = ((Integer)
> sample).toString();
> break;
> case java.awt.image.DataBuffer.TYPE_SHORT:
> result = ((Short)
> sample).toString();
> break;
> case
> java.awt.image.DataBuffer.TYPE_UNDEFINED:
> result = sample.toString();
> break;
> case java.awt.image.DataBuffer.TYPE_USHORT:
> result = ((Short)
> sample).toString();
> break;
> default:
> break;
>
> }
> } catch (ClassCastException e)
> {
> result = ((Integer) sample).toString();
> }
> return result;
> }
>
>
>
> Ciao
> Pasquale
>
>
> -----Messaggio originale-----
> Da: udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
> [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] Per conto di andrea
> antonello
> Inviato: martedì 10 febbraio 2009 15.29
> A: User-friendly Desktop Internet GIS
> Oggetto: Re: [udig-devel] Udig 1.1.1 problems to read sample value in
> geotiff 16 bit
>
>> I'm developing a plugin for udig(1.1.1 win32) and when I try to read
>> the sample value of pixel in a geotiff with 16 bit of depth, I
>> obtain always the same value 2147483647 (that is 2^31). Some ideas?
>> Can i read sample value of geotiff with 16 bit of depth?
>
> How exactly are you reading the image to get your information?
> Not sure how raster were dealth with in udig 1.1, but you should be
> able to access the imagereader and get your values.
> Do you have some code so show us?
>
> Ciao
> Andrea
>
>
>>
>> Cheers
>> --
>> View this message in context:
>> http://www.nabble.com/Udig-1.1.1-problems-to-read-sample-value-in-geo
>> t
>> iff-16-bit-tp21934226p21934226.html
>> Sent from the udig-devel mailing list archive at Nabble.com.
>>
>> _______________________________________________
>> 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
>
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