<div dir="ltr">Oh, so this is a definitely a bug. Is it reported yet in the issue tracker?</div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jan 10, 2018 at 3:55 PM, Seth G <span dir="ltr"><<a href="mailto:sethg@geographika.co.uk" target="_blank">sethg@geographika.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
<div><div>Hi Pablo,<br></div>
<div><br></div>
<div>Just to note I also ran into this issue so you are not alone!<br></div>
<div>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. <br></div>
<div>I never got a chance to debug further though. An error should ideally be reported somewhere rather than a blank, seemingly valid, image. <br></div>
<div><br></div>
<div>Seth</div>
<div><br></div>
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<div>On Wed, Jan 10, 2018, at 6:46 PM, Pablo Sanfilippo wrote:<br></div>
</div></div><blockquote type="cite"><div><div class="h5"><div dir="ltr"><div>Hi all,<br></div>
<div><br></div>
<div>I admit this is the weirdest issue I have come across. This are the relevant parts of my MapServer configuration:<br></div>
<div><br></div>
<div><div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""># A valid mapfile used for testing</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace"">MAP</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> NAME valid</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> STATUS ON</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> PROJECTION</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> "init=epsg:4326"</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> END</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""></span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> IMAGECOLOR 0 0 0</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> TRANSPARENT ON</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""></span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> WEB</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> METADATA</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> "wms_srs" "EPSG:4326 EPSG:3857"</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> END</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> END</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> </span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> LAYER</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> NAME "index"</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> STATUS ON</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> TYPE POLYGON</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> CONNECTIONTYPE POSTGIS</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> CONNECTION "host=x port=x dbname=x user=x password=x"</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> DATA "geometry from (select i.geometry, <a href="http://i.id" target="_blank">i.id</a>, '/vsis3/' || i.s3_bucket || '/' || i.s3_key as location from images_image) as index using unique id"</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> CLASS</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> STYLE</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> OUTLINECOLOR 0 0 0</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> WIDTH 1.0</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> COLOR 200 200 200</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> ANTIALIAS true</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> END</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> END</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> END</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""></span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> LAYER</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> NAME "images"</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> STATUS ON</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> TILEINDEX "index"</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> TILEITEM "location"</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> TYPE RASTER</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> PROJECTION</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> AUTO</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> END</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> METADATA</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> "wms_title" "Images"</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> END</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> END</span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""> </span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""></span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace"">END</span><br></div>
</div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace""></span><br></div>
<div><span class="m_2044650809904734904font" style="font-family:monospace," monospace"">The data in the PostGIS index is in EPSG:4326. The images referenced by the index are GeoTIFFs georeferenced in EPSG:4326.</span><br></div>
<div><br></div>
<div>A WMS request for the index layer shows the index polygons fine, whatever the SRS and image size in the request.<br></div>
<div>A WMS request for the images layer using SRS=EPSG:4326 shows the images fine, whatever the image size.<br></div>
<div>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.<br></div>
<div><br></div>
<div>Any clues?<br></div>
<div><br></div>
<div>Thanks!<br></div>
</div>
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