[Geoserver-users] Publishing GeoTiffs - ColorPalette with Alpha

GeoServer GeoServer User
1

I want to publish rasterdata (Geotiffs) with GeoServer. The resulting image
from WMS is shown in Grayscale, but actually it is an RGB-Image.
gdalinfo:
P:\OSGeo4W\bin>P:\OSGeo4W\bin\gdalinfo Q:\data\tif\pic.tif
Driver: GTiff/GeoTIFF
Files: Q:\data\tif\pic.tif
Size is 4523, 4522
Coordinate System is:
LOCAL_CS["DHDN / 3-degree Gauss-Kruger zone 3",
    GEOGCS["DHDN",
        DATUM["unknown",
            SPHEROID["unretrievable - using WGS84",6378137,298.257223563]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433]],
    AUTHORITY["EPSG","31467"],
    UNIT["metre",1]]
Origin = (3532474.929505631800000,5367000.280343170300000)
Pixel Size = (0.333485342299112,-0.333485342299112)
Metadata:
  AREA_OR_POINT=Area
  TIFFTAG_DATETIME=2012/05/08 11:38:04
  TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
  TIFFTAG_SOFTWARE=WGEO 5.0 WGEO BASIS
  TIFFTAG_XRESOLUTION=200
  TIFFTAG_YRESOLUTION=200
Image Structure Metadata:
  COMPRESSION=DEFLATE
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 3532474.930, 5367000.280)
Lower Left ( 3532474.930, 5365492.260)
Upper Right ( 3533983.284, 5367000.280)
Lower Right ( 3533983.284, 5365492.260)
Center ( 3533229.107, 5366246.270)
Band 1 Block=256x256 Type=Byte, ColorInterp=Palette
  Overviews: 2262x2261, 1131x1131, 566x566
  Mask Flags: PER_DATASET ALPHA
  Overviews of mask band: 2262x2261, 1131x1131, 566x566
  Color Table (RGB with 256 entries)
    0: 0,0,0,255
    1: 128,0,0,255
    2: 0,128,0,255
    3: 128,128,0,255
    4: 0,0,128,255
   ...
  253: 255,0,255,255
  254: 0,255,255,255
  255: 255,255,255,255
Band 2 Block=256x256 Type=Byte, ColorInterp=Alpha
  Overviews: 2262x2261, 1131x1131, 566x566

I think the problem is the Alpha-Channel. Without this Channel, the
resulting image/colors are correct.

--
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2

What style have you configured the WMS layer with? Can you cut and paste the SLD contents?

···

Jody Garnett

On Thu, Mar 13, 2014 at 4:06 AM, tv33lgl <tv33lgl@anonymised.com> wrote:

I want to publish rasterdata (Geotiffs) with GeoServer. The resulting image
from WMS is shown in Grayscale, but actually it is an RGB-Image.
gdalinfo:
P:\OSGeo4W\bin>P:\OSGeo4W\bin\gdalinfo Q:\data\tif\pic.tif
Driver: GTiff/GeoTIFF
Files: Q:\data\tif\pic.tif
Size is 4523, 4522
Coordinate System is:
LOCAL_CS[“DHDN / 3-degree Gauss-Kruger zone 3”,
GEOGCS[“DHDN”,
DATUM[“unknown”,
SPHEROID[“unretrievable - using WGS84”,6378137,298.257223563]],
PRIMEM[“Greenwich”,0],
UNIT[“degree”,0.0174532925199433]],
AUTHORITY[“EPSG”,“31467”],
UNIT[“metre”,1]]
Origin = (3532474.929505631800000,5367000.280343170300000)
Pixel Size = (0.333485342299112,-0.333485342299112)
Metadata:
AREA_OR_POINT=Area
TIFFTAG_DATETIME=2012/05/08 11:38:04
TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
TIFFTAG_SOFTWARE=WGEO 5.0 WGEO BASIS
TIFFTAG_XRESOLUTION=200
TIFFTAG_YRESOLUTION=200
Image Structure Metadata:
COMPRESSION=DEFLATE
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 3532474.930, 5367000.280)
Lower Left ( 3532474.930, 5365492.260)
Upper Right ( 3533983.284, 5367000.280)
Lower Right ( 3533983.284, 5365492.260)
Center ( 3533229.107, 5366246.270)
Band 1 Block=256x256 Type=Byte, ColorInterp=Palette
Overviews: 2262x2261, 1131x1131, 566x566
Mask Flags: PER_DATASET ALPHA
Overviews of mask band: 2262x2261, 1131x1131, 566x566
Color Table (RGB with 256 entries)
0: 0,0,0,255
1: 128,0,0,255
2: 0,128,0,255
3: 128,128,0,255
4: 0,0,128,255
…
253: 255,0,255,255
254: 0,255,255,255
255: 255,255,255,255
Band 2 Block=256x256 Type=Byte, ColorInterp=Alpha
Overviews: 2262x2261, 1131x1131, 566x566

I think the problem is the Alpha-Channel. Without this Channel, the
resulting image/colors are correct.

–
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3

Ciao,
please, find my comments inline below....

Regards,
Simone Giannecchini

Meet us at GEO Business 2014! in London! Visit http://goo.gl/fES3aK
for more information.

Ing. Simone Giannecchini
@simogeo
Founder/Director

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 333 8128928

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

-------------------------------------------------------

On Wed, Mar 12, 2014 at 6:06 PM, tv33lgl <tv33lgl@anonymised.com> wrote:

I want to publish rasterdata (Geotiffs) with GeoServer. The resulting image
from WMS is shown in Grayscale, but actually it is an RGB-Image.
gdalinfo:
P:\OSGeo4W\bin>P:\OSGeo4W\bin\gdalinfo Q:\data\tif\pic.tif
Driver: GTiff/GeoTIFF
Files: Q:\data\tif\pic.tif
Size is 4523, 4522
Coordinate System is:
LOCAL_CS["DHDN / 3-degree Gauss-Kruger zone 3",
    GEOGCS["DHDN",
        DATUM["unknown",
            SPHEROID["unretrievable - using WGS84",6378137,298.257223563]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433]],
    AUTHORITY["EPSG","31467"],
    UNIT["metre",1]]
Origin = (3532474.929505631800000,5367000.280343170300000)
Pixel Size = (0.333485342299112,-0.333485342299112)
Metadata:
  AREA_OR_POINT=Area
  TIFFTAG_DATETIME=2012/05/08 11:38:04
  TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
  TIFFTAG_SOFTWARE=WGEO 5.0 WGEO BASIS
  TIFFTAG_XRESOLUTION=200
  TIFFTAG_YRESOLUTION=200
Image Structure Metadata:
  COMPRESSION=DEFLATE
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 3532474.930, 5367000.280)
Lower Left ( 3532474.930, 5365492.260)
Upper Right ( 3533983.284, 5367000.280)
Lower Right ( 3533983.284, 5365492.260)
Center ( 3533229.107, 5366246.270)
Band 1 Block=256x256 Type=Byte, ColorInterp=Palette
  Overviews: 2262x2261, 1131x1131, 566x566
  Mask Flags: PER_DATASET ALPHA
  Overviews of mask band: 2262x2261, 1131x1131, 566x566
  Color Table (RGB with 256 entries)
    0: 0,0,0,255
    1: 128,0,0,255
    2: 0,128,0,255
    3: 128,128,0,255
    4: 0,0,128,255
   ...
  253: 255,0,255,255
  254: 0,255,255,255
  255: 255,255,255,255
Band 2 Block=256x256 Type=Byte, ColorInterp=Alpha
  Overviews: 2262x2261, 1131x1131, 566x566

I think the problem is the Alpha-Channel. Without this Channel, the
resulting image/colors are correct.

You are right, I believe we don't (currently) support this kind of
GeoTiff in GeoServer.

I would probably try to select the first band and see what happens,
going by memory I am not sure we should retain the colormap atatched
to it.

That said, could you share a sample of such imagery for testing?

--
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------------------------------------------------------------------------------
Learn Graph Databases - Download FREE O'Reilly Book
"Graph Databases" is the definitive new guide to graph databases and their
applications. Written by three acclaimed leaders in the field,
this first edition is now available. Download your free book today!
http://p.sf.net/sfu/13534_NeoTech
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