[ka-Map-users] MapServer Reprojection

[Ryan Ollerenshaw]

So is the projection that i define in the mapfile and layer the projection that
the data is in or what it is getting reprojected to?  I was never sure if the
projection that data is in should be the mapfile projection or the layer
projection or the wms_projection.

Quoting "Delfos, Jacob" <Jacob.Delfos at maunsell.com>:

> Ryan,
>
> I don't think MapServer will reproject unless the layer and the mapfile
> have a projection defined, like:
>
> #####################
> PROJECTION
> "init=epsg:4326"
> END
> #####################
>
> You would have to put that in your layer, and your mapfile (the global
> projection). This is separate to projection parameters specified in the
> metadata, for WMS, WCS, or other web-services. Those parameters are used
> by the remote system to find out what projection the layer you are
> serving out is in.
>



>
> > -----Original Message-----
> > My problem is that no matter what I have my SRS numbers set
> > to my data will
> > always be displayed the same.  What could I be missing that
> > would cause
> > MapServer's re-projection capabilities not to work.
> >
> > I have several tiled .tiff images that I georeference by
> > lat/long values using:
> > gdal_translate -a_ullr 180 0 210 -30  thm_dir_N-30_180.png
> > thm_dir_N-30_180.tiff
> >
> > I am then displaying them in MapServer using:
> >
> > LAYER
> >   NAME "themis"
> >   STATUS ON
> >   TILEINDEX "thm_dir.shp"
> >   TILEITEM "location"
> >   TYPE RASTER
> >   DUMP TRUE
> >   METADATA
> >     wcs_name "THEMIS_Data"
> >     wcs_description "THEMIS dataset"
> >     wcs_label "THEMIS dataset"
> >     ows_srs "EPSG:4326"
> >     ows_extent "0 -90 360 90"
> >     wcs_resolution "150 150"
> >     wcs_size "2700 3197"
> >     wcs_formats "GEOTIFF"
> >   END
> > END
> >
> > Here is what gdalinfo reports, but isn't it MapServer that
> > does all the
> > re-projection?  So that fact that the Coordinate System here
> > is blank is ok
> > right?
> >
> > gdalinfo thm_dir_-30_000.tiff
> > Driver: GTiff/GeoTIFF
> > Size is 7680, 7680
> > Coordinate System is `'
> > Origin = (0.000000,0.000000)
> > Pixel Size = (0.00390625,-0.00390625)
> > Corner Coordinates:
> > Upper Left  (   0.0000000,   0.0000000)
> > Lower Left  (   0.0000000, -30.0000000)
> > Upper Right (  30.0000000,   0.0000000)
> > Lower Right (  30.0000000, -30.0000000)
> > Center      (  15.0000000, -15.0000000)
> > Band 1 Block=7680x1 Type=Byte, ColorInterp=Gray
> >   Overviews: 3840x3840, 1920x1920, 960x960, 480x480, 240x240
> > _______________________________________________
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> >
>