[mapserver-users] Mapserver bumped from 7.0.7 to 7.4.1 leads to wrong projection of features

[Jaap Donker]

Thanks for your response.

In our frontend we use the following projection string for EPSG:28992:
+proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889
+k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel
+towgs84=565.417,50.3319,465.552,-0.398957,0.343988,-1.8774,4.0725
+units=m +no_defs

I hope these parts of the map file are informative enough:

MAP
  PROJECTION
    'init=epsg:28992'
  END

  OUTPUTFORMAT
    NAME "GTiff"
    DRIVER GDAL/GTiff
    MIMETYPE "image/tiff"
    IMAGEMODE INT16
    EXTENSION "tif"
  END

  OUTPUTFORMAT
    NAME "GTiff-FLOAT"
    DRIVER GDAL/GTiff
    MIMETYPE "image/tiff"
    IMAGEMODE FLOAT32
    EXTENSION "tif"
  END

  OUTPUTFORMAT
    NAME "geojson"
    DRIVER "OGR/GEOJSON"
    MIMETYPE "application/json; subtype=geojson; charset=utf-8"
    FORMATOPTION "STORAGE=memory"
    FORMATOPTION "FORM=SIMPLE"
  END
...
  LAYER
    METADATA
      "wfs_srs"            "EPSG:4326"
      "wfs_enable_request" "*"
      "wfs_getfeature_formatlist" "geojson"
      "gml_include_items"  "all"
      "wfs_maxfeatures"    "100"  # Max features to load
    END
    TYPE POLYGON
    STATUS ON
    PROJECTION
      "init=epsg:4326"
    END
  END
END

Kind regards,

Jaap


On Thu, 14 Nov 2019 at 18:53, Rahkonen Jukka (MML) <
jukka.rahkonen at maanmittauslaitos.fi> wrote:

> Hi,
>
>
>
> Please add relevant parts of your mapfile. Obviously all that relates to
> projections and an example of the client side requests as well if you are
> changing the coordinate system on the fly.
>
>
>
> -Jukka Rahkonen-
>
>
>
> *Lähettäjä:* mapserver-users <mapserver-users-bounces at lists.osgeo.org> *Puolesta
> *Jaap Donker
> *Lähetetty:* torstai 14. marraskuuta 2019 17.51
> *Vastaanottaja:* mapserver-users at lists.osgeo.org
> *Aihe:* [mapserver-users] Mapserver bumped from 7.0.7 to 7.4.1 leads to
> wrong projection of features
>
>
>
> Hi,
>
>
>
> Upon updating mapserver, projections for the features we use in our webapp
> were off.
>
> We updated from version 7.0.7 to version 7.4.1. I'd like to stress that
> nothing else changed in setup during testing.
>
> In the images below you can see the situation before (left) and after
> (right). The blue lines are polygons representing seamlines for the
> orthomosaic of aerials we are using.
>
> This change in projection is troubling.
>
>
>
> Original situation:
>
> https://pasteboard.co/IGFtgdY.png
>
>
>
> New situation:
>
> https://pasteboard.co/IGFtxfs.png
>
>
>
> Going through the backlog I see that there's some changes in PROJ4, but
> I'm a bit at a loss as to how best to investigate this issue.
>
>
>
> Any help or guidance would be very much appreciated.
>
>
>
> Regards,
>
>
>
> Jaap
>
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