Hi, Simone.

The style:
<?xml version="1.0" ?>
<sld:StyledLayerDescriptor version="1.0.0" xmlns="http://www.opengis.net/sld"; 
xmlns:gml="http://www.opengis.net/gml"; xmlns:ogc="http://www.opengis.net/ogc"; 
xmlns:sld="http://www.opengis.net/sld";>
    <sld:UserLayer>
        <sld:LayerFeatureConstraints>
            <sld:FeatureTypeConstraint/>
        </sld:LayerFeatureConstraints>
        <sld:UserStyle>
            <sld:Name>PrecipAnual-2016i</sld:Name>
            <sld:Title/>
            <sld:FeatureTypeStyle>
                <sld:Name/>
                <sld:Rule>
                    <sld:RasterSymbolizer>
                        <sld:Geometry>
                            <ogc:PropertyName>grid</ogc:PropertyName>
                        </sld:Geometry>
                        <sld:Opacity>1</sld:Opacity>
                        <sld:ColorMap>
                            <sld:ColorMapEntry color="#f7fbff" 
label="279.000000" opacity="1.0" quantity="279"/>
                            <sld:ColorMapEntry color="#deebf7" 
label="463.210000" opacity="1.0" quantity="463.21"/>
                            <sld:ColorMapEntry color="#c7dcef" 
label="647.420000" opacity="1.0" quantity="647.42"/>
                            <sld:ColorMapEntry color="#a2cbe2" 
label="831.630000" opacity="1.0" quantity="831.63"/>
                            <sld:ColorMapEntry color="#72b2d7" 
label="1015.840000" opacity="1.0" quantity="1015.84"/>
                            <sld:ColorMapEntry color="#4997c9" 
label="1200.050000" opacity="1.0" quantity="1200.05"/>
                            <sld:ColorMapEntry color="#2878b8" 
label="1384.260000" opacity="1.0" quantity="1384.26"/>
                            <sld:ColorMapEntry color="#0d57a1" 
label="1554.300000" opacity="1.0" quantity="1554.3"/>
                            <sld:ColorMapEntry color="#08306b" 
label="1696.000000" opacity="1.0" quantity="1696"/>
                        </sld:ColorMap>
                    </sld:RasterSymbolizer>
                </sld:Rule>
            </sld:FeatureTypeStyle>
        </sld:UserStyle>
    </sld:UserLayer>
</sld:StyledLayerDescriptor>

And gdalinfo output:
Driver: GTiff/GeoTIFF
Files: C:\Procesos_TMP\SIAR_Teledeteccion\PrecipAnual-2016i.tif
Size is 107809, 88498
Coordinate System is:
PROJCS["WGS 84 / UTM zone 30N",
    GEOGCS["WGS 84",
        DATUM["WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,
                AUTHORITY["EPSG","7030"]],
            AUTHORITY["EPSG","6326"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4326"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-3],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","32630"]]
Origin = (-37200.589999999997000,4880153.321000000500000)
Pixel Size = (10.000000000000000,-10.000000000000000)
Metadata:
  AREA_OR_POINT=Area
  Band_1=Mosaic (Band 1)
Image Structure Metadata:
  INTERLEAVE=BAND
Corner Coordinates:
Upper Left  (  -37200.590, 4880153.321) (  9d41'10.33"W, 43d52'42.55"N)
Lower Left  (  -37200.590, 3995173.321) (  8d57'12.87"W, 35d57'11.34"N)
Upper Right ( 1040889.410, 4880153.321) (  3d43'54.49"E, 43d52'32.87"N)
Lower Right ( 1040889.410, 3995173.321) (  2d59'39.32"E, 35d57' 4.03"N)
Center      (  501844.410, 4437663.321) (  2d58'42.11"W, 40d 5'21.30"N)
Band 1 Block=107809x1 Type=Int16, ColorInterp=Gray
  Description = Mosaic (Band 1)
  Minimum=172.000, Maximum=2450.000, Mean=570.734, StdDev=280.509
  NoData Value=0
  Metadata:
    STATISTICS_MAXIMUM=2450
    STATISTICS_MEAN=570.73436824794
    STATISTICS_MINIMUM=172
    STATISTICS_STDDEV=280.50861764515

Thanks.

Un saludo.
[http://www.tragsa.es/SiteCollectionImages/Relaciones%20Institucionales%20(Prensa)/FIRMA%20OUTLOOK/Tragsatec.png]

[http://www.tragsa.es/SiteCollectionImages/Relaciones%20Institucionales%20(Prensa)/FIRMA%20OUTLOOK/cenefa.png]

Briones Garcia, Pedro
Grupo Tragsa - SEPI

[http://www.tragsa.es/SiteCollectionImages/Relaciones%20Institucionales%20(Prensa)/FIRMA%20OUTLOOK/Tragsatec_SEPI.png]

Calle Julián Camarillo 6B - 28037 Madrid
Tel.: 913226489 - 88216 - Fax: 913226005
[email protected]
<mailto:[email protected]>www.tragsa.es <http://www.tragsa.es/>


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De: Simone Giannecchini [mailto:[email protected]]
Enviado el: miércoles, 31 de octubre de 2018 14:47
Para: Briones Garcia, Pedro <[email protected]>
CC: geoserver-users <[email protected]>
Asunto: Re: [Geoserver-users] 16bit image rendering problem

Dear Pedro,
we need to see the styles and the output of gdalinfo --stats on this image 
before saying anything.
Can you provide them?

Regards,
Simone Giannecchini
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On Wed, Oct 31, 2018 at 12:41 PM Briones Garcia, Pedro 
<[email protected]<mailto:[email protected]>> wrote:
Hi all.

I’m having problems rendering a 16 bit GeoTIFF image in GeoServer. I’ve created 
an SLD and I’ve associated it with the image, but the colors don’t correspond 
to the ones of the SLD. Looking for information in this list, I found that the 
GeoTIFF is stretched to 8 bits before being rendered by GeoServer. I’ve tried 
too <ContrastEnhancement> option, but I get an error. I can’t convert the image 
to 8 bit because I have values greater than 255.

Is there any workaround?

Thanks in advance.

[http://www.tragsa.es/SiteCollectionImages/Relaciones%20Institucionales%20(Prensa)/FIRMA%20OUTLOOK/Tragsatec.png]

[http://www.tragsa.es/SiteCollectionImages/Relaciones%20Institucionales%20(Prensa)/FIRMA%20OUTLOOK/cenefa.png]

Briones Garcia, Pedro
JGAP Sist Inform Geográfica
S.Información Geográfica / G.Sist.Inf. Geografica
Grupo Tragsa - SEPI

[http://www.tragsa.es/SiteCollectionImages/Relaciones%20Institucionales%20(Prensa)/FIRMA%20OUTLOOK/Tragsatec_SEPI.png]

Calle Julián Camarillo 6B - 28037 Madrid
Tel.: 913226489 - 88216 - Fax: 913226005
[email protected]
<mailto:[email protected]>www.tragsa.es <http://www.tragsa.es/>


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necesario
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