Hello André,
that sounds like a similar problems we had when using mapserver for our
mapproxy configuration.
In our case the problem was caused by the PROJ_LIB-Path of the
Mapserver-config file:
For MS8 you need to set it to the PROJ9-Share-Directory but in that
directory a file from the PROJ-Share
(without the 9) is missing, its name is simply "epsg".
After copying that file to the PROJ9-Share-Directory those inaccuracies
were gone.
Maybe you can try this.
Best regards
Stefan H.
Am 10.10.2024 um 09:24 schrieb Andre Mulder via MapServer-users:
Dear community,
Problem description:
We configured two mapserver installations:
1 - Ubuntu 24.04.1 LTS (GNU/Linux 6.8.0-45-generic x86_64)
2 - Windows 11
Both distributions contain the same map file which delivers
an OGC WFS.
Both map files refer to the same source:
Postgres/GIS database with 2 records with point geometry stored with
SRID 28992.
The OGC WFS is configured for GEOJSON output with EPSG:4326
Issue
The output of the Ubuntu OS differs (a bit) from the output of the
Windows OS.
Ubuntu:
{
"features": [
{
"geometry": {
"coordinates": [
4.529922,
51.943676
],
"type": "Point"
},
"id": "511557",
Windows:
{
"features": [
{
"geometry": {
"coordinates": [
4.529612,
51.942715
],
"type": "Point"
},
"id": "511557",
I believe/think the Windows version is correct and the Ubuntu version
is incorrect.
When I run cs2cs on the ubuntu server:
mapserver@mapserver:~$ echo 96033.1697484512 439710.083800115 | cs2cs
+init=epsg:28992 +to +init=epsg:4326 -f "%.8f"
4.52961103 51.94271408 0.00000000
mapserver@mapserver:~$
When I run gdaltransform on the ubuntu server:
mapserver@mapserver:~$ echo "96033.1697484512 439710.083800115" |
gdaltransform -s_srs EPSG:28992 -t_srs EPSG:4326
4.52961103108079 51.9427140778367 0
mapserver@mapserver:~$
Both outcome match the Windows result but do NOT match the Ubuntu
mapserver results.
The versions of mapserver and extensions used differ from each other.
Ubuntu:
mapserver@mapserver:~$ mapserv -v
MapServer version 8.0.1 PROJ version 9.4 GDAL version 3.8 OUTPUT=PNG
OUTPUT=JPEG OUTPUT=KML SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE
SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS SUPPORTS=RSVG SUPPORTS=ICONV
SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT
SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER
SUPPORTS=SOS_SERVER SUPPORTS=OGCAPI_SERVER SUPPORTS=FASTCGI
SUPPORTS=THREADS SUPPORTS=GEOS SUPPORTS=PBF INPUT=JPEG INPUT=POSTGIS
INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE INPUT=FLATGEOBUF
mapserver@mapserver:~$
Windows:
C:\PROGRA~1\MAPSER~1\ms4w\Apache\cgi-bin>mapserv.exe -v
MapServer version 8.3.0-dev (MS4W 5.0.0) PROJ version 9.5 GDAL
version 3.10 OUTPUT=PNG OUTPUT=JPEG OUTPUT=KML SUPPORTS=PROJ
SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS
SUPPORTS=SVGCAIRO SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER
SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT
SUPPORTS=WCS_SERVER SUPPORTS=SOS_SERVER SUPPORTS=OGCAPI_SERVER
SUPPORTS=FASTCGI SUPPORTS=THREADS SUPPORTS=GEOS SUPPORTS=PBF
INPUT=JPEG INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
INPUT=FLATGEOBUF
/Does the mapserver development team have an explanation for this
difference?/
I can send the map file separately if required.
With best regards,
André Mulder
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