[mapserver-dev] Testing PROJ 5.0.0 release candidates

Jeff McKenna jmckenna at gatewaygeomatics.com
Tue Mar 6 05:21:43 PST 2018

MapServer devs should take note that I was correct in my initial 
testing: PROJ 5.0.0 breaks all transformations to and from the Google 
"Web Mercator" projection (there is about a 10km shift).  You can read 
my full report here and its long thread while testing RC5 and RC6 in 
GDAL, MapServer, and PROJ (I tested on Ubuntu 14.04 and Windows): 

The fix will be available in the PROJ 5.0.1 release (early April).  I 
encourage everyone to provide feedback directly to the PROJ team if you 
can (there is also a Github ticket if you want to follow along, provide 
testing feedback or comments: https://github.com/OSGeo/proj.4/issues/834 )



On 2018-02-24 7:40 PM, Jeff McKenna wrote:
> Update: MapServer and PROJ v5 were in fact reprojecting my test map, but 
> I was confused because (I was testing MS4W packages Mapbender and 
> GeoMOOSE demos) in fact the GeoMOOSE demo opening map was totally blank 
> (it should be a parcels line layer).  I went down rabbit holes trying to 
> find what was happening with PROJ v5 not displaying that data in 
> GeoMOOSE and MapServer......when in fact if I zoom out a bit the layer 
> is displayed properly (meaning the data extents have changed in the 
> displayed EPSG:3857 with PROJ v5).
> I'll report to GeoMOOSE team.
> Of course it could only be a mistake in my testing environment.
> Sorry for all this noise here.
> -jeff
> On 2018-02-23 5:18 PM, Jeff McKenna wrote:
>> Hi all,
>> I am wondering if anyone else has tested the PROJ 5 release candidates 
>> (http://lists.maptools.org/pipermail/proj/2018-February/008045.html).  
>> I am testing RC5 on Windows, with MapServer branch-7-0 and GDAL 2.2.3, 
>> and no problems with GDAL (reprojections with ogr2ogr etc), but any 
>> attempt to reproject with MapServer returns a blank map image and the 
>> following error in the logs:
>> msProjectRect(): Projection library error. All points failed to 
>> reproject.
>> Has anyone else tested this yet on any platforms?  Please let me know.
>> Thanks,
>> -jeff
Jeff McKenna
MapServer Consulting and Training Services

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