[mapserver-users] GDALDatasetRasterIO() failed: IReadBlock failed

[Jeff Konnen]

Hi,

I've configured a map - file with GDAL-WMS to reproject WMSC-Files.

It works more or less. I'm using 11 different scales where I calculate new tiles in my SRS and on 7 out of 11 levels, the results are OK.
On the other levels, I keep getting the following error-message:

<?xml version='1.0' encoding="ISO-8859-1" standalone="no" ?>

<!DOCTYPE ServiceExceptionReport SYSTEM "http://schemas.opengis.net/wms/1.1.1/exception_1_1_1.dtd">

<ServiceExceptionReport version="1.1.1">

<ServiceException>

msDrawMap(): Image handling error. Failed to draw layer named 'ORTHO_IGNF'.

drawGDAL(): Unable to access file. GDALDatasetRasterIO() failed: /home/mapserver/config/IGN/ortho_wms.txt, band 1: IReadBlock failed at X offset 2991, Y offset 2553

</ServiceException>

</ServiceExceptionReport>


Here is my GDAL_WMS - config:

<GDAL_WMS>
    <Service name="WMS">
        <Version>1.1.1</Version>
        <ServerUrl>my_url_was_here</ServerUrl>
        <SRS>IGNF:GEOPORTALFXX</SRS>
        <ImageFormat>image/jpeg</ImageFormat>
        <Layers>my_layer_name_was_here</Layers>
    </Service>
    <DataWindow>
        <UpperLeftX>-1048576</UpperLeftX>
        <UpperLeftY>6815744</UpperLeftY>
        <LowerRightX>2097152</LowerRightX>
        <LowerRightY>3670016</LowerRightY>
        <SizeX>6291456</SizeX>
        <SizeY>6291456</SizeY>
        <TileLevel>13</TileLevel>
    </DataWindow>
    <Projection>+title=EPSG:310024802 +proj=eqc +nadgrids=null +towgs84=0.0000,0.0000,0.0000 +a=6378137.0000 +rf=298.2572221010000 +lat_0=0.000000000 +lon_0=0.000000000 +lat_ts=46.500000000 +x_0=0.000 +y_0=0.000 +units=m +wktext +no_defs</Projection>
    <BandsCount>3</BandsCount>
    <BlockSizeX>256</BlockSizeX>
    <BlockSizeY>256</BlockSizeY>
    <OverviewCount>12</OverviewCount>
</GDAL_WMS>
And here my mapfile:

MAP
    NAME "LIMADMIN"
    
    PROJECTION
       "init=epsg:2169"
    END
    
WEB

        METADATA
          
            "wms_srs"      "EPSG:2169 EPSG:4326 EPSG:4258"
            "wms_extent" "46000 57000 106000 141000"
            "ows_enable_request" "*"
            
        END
        IMAGEPATH "/tmp"

    END

    EXTENT 46000 57000 106000 141000
    UNITS METERS

    OUTPUTFORMAT
      NAME "pnga"
      MIMETYPE "image/png"
      DRIVER "AGG/PNG"
      EXTENSION "png"
      IMAGEMODE "RGBA"
      TRANSPARENT TRUE
      FORMATOPTION "INTERLACE=OFF"
    END

    LAYER
        NAME "ORTHO_IGNF"
        DATA ortho_wms.txt
        TYPE RASTER
        STATUS ON
        DUMP FALSE
        PROCESSING "DITHER=YES"
        PROCESSING "RESAMPLE=BILINEAR"
        METADATA
            "wms_name" "ORTHO_IGNF"
            "wms_extent" "46000 57000 106000 141000"

        END
       PROJECTION
         "title=EPSG:310024802" "proj=eqc"
		 "nadgrids=null"
		 "towgs84=0.0000,0.0000,0.0000"
		 "a=6378137.0000" 
		 "rf=298.2572221010000"
		 "lat_0=0.000000000"
		 "lon_0=0.000000000"
		 "lat_ts=46.500000000"
		 "x_0=0.000"
		 "y_0=0.000"
		 "units=m"
		 "wktext"
		 "no_defs"
        END
    END
    
END

Any idea where this could be going wrong?

Thanks in advance and best regards
Jeff
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/mapserver-users/attachments/20120305/e169e0a3/attachment.htm>