Why does UMN-Mapserver shows an ERDAS Image-File (.img) as white shape?

Posted by Mnementh on Stack Overflow See other posts from Stack Overflow or by Mnementh
Published on 2010-05-21T13:06:51Z Indexed on 2010/05/21 13:10 UTC
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I want to render an ERDAS-Image-file (suffix .img) with the UMN-Mapserver. The data is rendered on the right position and with the correct shape, but all data is white instead of an raster-image. The Image contains many layers. My mapfile looks like this:

MAP
NAME "Test"

WEB
                  METADATA
                                         "wms_title" "test"
                                         "WMS_SRS" "epsg:31466 epsg:31467 epsg:31468  epsg:31469 epsg:4326 epsg:25832 epsg:3035"
                  END
                  LOG "test.log"
                  IMAGEPATH "."
END

SHAPEPATH "."
PROJECTION
                  "init=epsg:32632"
END

LAYER
                 NAME    "testlayer"
                 TYPE    RASTER
                 DATA    "test.img"
                 STATUS  ON
                 OFFSITE 0 0 0
END

OUTPUTFORMAT
                  NAME png
                  DRIVER "GD/PNG"
                  MIMETYPE "image/png"
                  IMAGEMODE RGBA
END

END

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