Hi Gerhard,
It seems to be a problem with the LIBPNG library on your server. Is
"PNG" listed in the response from the command "gdalinfo --formats" ?
I might also:
- recompile ZLIB
- recompile LIBPNG
(executing 'sudo ldconfig' after each)
- recompile GDAL (point to your external LIBPNG)
- test with 'gdalinfo --formats'
- recompile MapServer
- test your mapfile with a 'shp2img' command
-jeff
--
Jeff McKenna
GatewayGeo: Developers of MS4W, MapServer Consulting and Training
co-founder of FOSS4G
http://gatewaygeo.com/
On 2021-08-12 7:15 a.m., Gerhard Völkl wrote:
Hello,
when using a png image as symbol I got the error
Image handling error
When using a gif image all is fine.
But I can’t change all 1000 Images to gif.
What can I do? Whatˋs wrong?
Here an example Output:
/usr/lib/cgi-bin/mapserv
QUERY_STRING="map=/data/ows/maps/test.map&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=725521.7,5433653.4,726708.5,5434495.5&CRS=EPSG:25832&WIDTH=1048&HEIGHT=317&LAYERS=test&STYLES=&FORMAT=image/png&DPI=96&MAP_RESOLUTION=96&FORMAT_OPTIONS=dpi:96&TRANSPARENT=TRUE"
libpng error: bad parameters to zlib
Content-Type: text/xml; charset=UTF-8
<?xml version='1.0' encoding="UTF-8" standalone="no" ?>
<ServiceExceptionReport version="1.3.0"
xmlns="http://www.opengis.net/ogc";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://www.opengis.net/ogc
http://schemas.opengis.net/wms/1.3.0/exceptions_1_3_0.xsd";>
<ServiceException>
msDrawMap(): Image handling error. Failed to draw layer named
'test-layer'.
</ServiceException>
</ServiceExceptionReport>
GDAL: In GDALDestroy - unloading GDAL shared library.
Thanks
Best regards Gerhard
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