Dear all, I noticed a weird behaviour with a WMS request based on EPSG:4326, when the BBOX exeeds the [-180 ; +180] longitude intervalle. We bump into this problem when we try to display images over the antimeridian line.
I could observe this problem with the "MapServer Demonstration Server". *Observed*Mapserver response is not consistent whether the BBOX overlaps eastward or westward : 1) Westward BBOX=-90,-200,90,100 The image is clipped on both east and west sides, that is in the [-180° ; +100°] longitude intervalle. On the west side, pixels in the [-200° ; -180°] longitude intervalle are transparent. The complete request URL is : https://demo.mapserver.org/cgi-bin/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=-90,-200,90,100&CRS=EPSG:4326&WIDTH=953&HEIGHT=480&LAYERS=bluemarble&STYLES=&FORMAT=image/png&TRANSPARENT=true&STYLES= 2) Eastward BBOX=-90,-100,90,200 The image is clipped on the west side, which is OK. On the east side, pixels in the [+180°; +200°] longitude intervalle are not correct. The complete request URL is : https://demo.mapserver.org/cgi-bin/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=-90,-100,90,200&CRS=EPSG:4326&WIDTH=953&HEIGHT=480&LAYERS=bluemarble&STYLES=&FORMAT=image/png&TRANSPARENT=true&STYLES= *Expected*At least, I would expect to have the same behaviour on both sides of the antimeridian. Furthermore, couldn't we get the "repeated world" on the [-200° ; -180°] (respectively [+180° ; +200°]) longitude intervalle ? Thanks for your help Philippe The information in this e-mail is confidential. The contents may not be disclosed or used by anyone other than the addressee. Access to this e-mail by anyone else is unauthorised. If you are not the intended recipient, please notify Airbus immediately and delete this e-mail. Airbus cannot accept any responsibility for the accuracy or completeness of this e-mail as it has been sent over public networks. If you have any concerns over the content of this message or its Accuracy or Integrity, please contact Airbus immediately. All outgoing e-mails from Airbus are checked using regularly updated virus scanning software but you should take whatever measures you deem to be appropriate to ensure that this message and any attachments are virus free.
_______________________________________________ MapServer-users mailing list MapServer-users@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/mapserver-users
