[mapserver-dev] Raster fliped with WMS and reprojection
yves.jacolin at camptocamp.com
Mon Jun 30 01:15:32 PDT 2014
I opened an issue here: https://github.com/mapserver/mapserver/issues/4946
2014-06-12 20:28 GMT+02:00 Even Rouault <even.rouault at mines-paris.org>:
> Le jeudi 12 juin 2014 14:12:58, Yves Jacolin a écrit :
>> I have a raster file in GeoTiff, EPSG:4326. I am using it in a mapfile for
>> WMS services in EPSG:3857.
>> When zooming out I get the raster layer flipped. All other vector layer are
>> ok. It seems that it occurs when the BBOX is outside the EPSG:3857
>> projected bounds limitation .
>> I have another issue which may not be linked with the previous one: a
>> vertical blank line appear on the left (beyon 180 degrees). However, the
>> raster is showing again after the date line.
>> Here two requests, the first one shows the wrong result:
>> The second one shows the good result:
>> - WIDTH=1503
>> + WIDTH=1502
>> This MapServer is quiet old but I can reproduce the issue with master.
>> If I open the raster file directly in QGIS I have some other rendering
>> issue (some part of the raster are not displayed at all, but always
>> different part among the zoom level (always on the left anyway).
> I guess those artifacts are encountered with on-the-fly reprojection turned on
> ? QGIS must have similar issues as MapServer with discontinuities at date-line
>> Log in MapServer doesn't seems to show any error.
>> Any idea? Should I fill a ticket with this?
> Could be usefull with .map, associated input data and requests.
>>  http://epsg.io/3857
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