Hi, I have been using a spatialite layer as a tileindex for years without problems so definitely that is not a bug that affects all users and use cases. Try to create a zip file that contains everything that is needed for reproducing the issue. Let’s hope that you can make it with a spatialite database and two images in the tileindex.
Have you already tried to add explicit PROJECTION blocks into both LAYERs? -Jukka Rahkonen- Lähettäjä: mapserver-users [mailto:[email protected]] Puolesta Pablo Sanfilippo Lähetetty: 11. tammikuuta 2018 14:46 Vastaanottaja: Seth G <[email protected]> Kopio: [email protected] Aihe: Re: [mapserver-users] MapServer returns a blank image when requesting a square image Oh, so this is a definitely a bug. Is it reported yet in the issue tracker? On Wed, Jan 10, 2018 at 3:55 PM, Seth G <[email protected]<mailto:[email protected]>> wrote: Hi Pablo, Just to note I also ran into this issue so you are not alone! A WMS request from OpenLayers to MapServer would be fine, but modifying the size of the image (WIDTH and HEIGHT parameters) would result in a blank image and no errors in the logs. I never got a chance to debug further though. An error should ideally be reported somewhere rather than a blank, seemingly valid, image. Seth -- web:http://geographika.co.uk twitter: @geographika On Wed, Jan 10, 2018, at 6:46 PM, Pablo Sanfilippo wrote: Hi all, I admit this is the weirdest issue I have come across. This are the relevant parts of my MapServer configuration: # A valid mapfile used for testing MAP NAME valid STATUS ON PROJECTION "init=epsg:4326" END IMAGECOLOR 0 0 0 TRANSPARENT ON WEB METADATA "wms_srs" "EPSG:4326 EPSG:3857" END END LAYER NAME "index" STATUS ON TYPE POLYGON CONNECTIONTYPE POSTGIS CONNECTION "host=x port=x dbname=x user=x password=x" DATA "geometry from (select i.geometry, i.id<http://i.id>, '/vsis3/' || i.s3_bucket || '/' || i.s3_key as location from images_image) as index using unique id" CLASS STYLE OUTLINECOLOR 0 0 0 WIDTH 1.0 COLOR 200 200 200 ANTIALIAS true END END END LAYER NAME "images" STATUS ON TILEINDEX "index" TILEITEM "location" TYPE RASTER PROJECTION AUTO END METADATA "wms_title" "Images" END END END The data in the PostGIS index is in EPSG:4326. The images referenced by the index are GeoTIFFs georeferenced in EPSG:4326. A WMS request for the index layer shows the index polygons fine, whatever the SRS and image size in the request. A WMS request for the images layer using SRS=EPSG:4326 shows the images fine, whatever the image size. A WMS request for the images layer using SRS=EPSG:3857 will work fine as long as the requested image size's x is greater than or equal to the y. If not, it will return a blank (transparent) image. For example, a 1300x1299 image will work fine, a 1300x1300 image won't work and 1301x1300 won't work either. Any clues? Thanks! _______________________________________________ mapserver-users mailing list [email protected]<mailto:[email protected]> https://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list [email protected]<mailto:[email protected]> https://lists.osgeo.org/mailman/listinfo/mapserver-users
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