[mapserver-users] Use Ground Control Points from GeoTIFF

[Rahkonen Jukka (MML)]

Try to warp into .VRT, that takes so little time and disk space that it could be a workaround if it works.

-Jukka-

Lähettäjä: Jesper Kempe <jesper.kempe at gmail.com>
Lähetetty: keskiviikko 2. syyskuuta 2020 11.40
Vastaanottaja: Rahkonen Jukka (MML) <jukka.rahkonen at maanmittauslaitos.fi>
Kopio: Steve Lime <sdlime at gmail.com>; Mapserver <mapserver-users at lists.osgeo.org>
Aihe: Re: [mapserver-users] Use Ground Control Points from GeoTIFF

Yes, a gdalwarp on the file works fine but I would really like to avoid that.
A "gdalwarp -t_srs "EPSG:3857" sat.tif sat_3857.tif" and use the file  sat_3857.tif works.

The file I want to show in Mapserver is available at https://drive.google.com/file/d/1t3fM0Ej1FGwrdqbvg5EhIFcpnNOfKdQS/view?usp=sharing if anyone wants to give it a try.

//Jesper

Den ons 2 sep. 2020 kl 10:26 skrev Rahkonen Jukka (MML) <jukka.rahkonen at maanmittauslaitos.fi<mailto:jukka.rahkonen at maanmittauslaitos.fi>>:
Hi,

I am not suggesting this as a final solution yet, but gather some knowledge and try if image works when a) warped into GeoTIFF with gdalwarp b) warped into .vrt

-Jukka Rahkonen-

Lähettäjä: mapserver-users <mapserver-users-bounces at lists.osgeo.org<mailto:mapserver-users-bounces at lists.osgeo.org>> Puolesta Jesper Kempe
Lähetetty: keskiviikko 2. syyskuuta 2020 10.52
Vastaanottaja: Steve Lime <sdlime at gmail.com<mailto:sdlime at gmail.com>>
Kopio: Mapserver <mapserver-users at lists.osgeo.org<mailto:mapserver-users at lists.osgeo.org>>
Aihe: Re: [mapserver-users] Use Ground Control Points from GeoTIFF

Hi

This is the mapfile:

MAP
    NAME "map"
    WEB
        METADATA
            "wms_title"            "WMS mapserver"
            "wms_srs"              "EPSG:4326 EPSG:3021 EPSG:9999 EPSG:3006 EPSG:900913"
            "wms_extent"           "1225000 6130000 1910000 7675000"
            "wms_enable_request"   "*"
            "wfs_enable_request"   "*"
        END
    END

    PROJECTION
        "init=epsg:4326"
    END

    EXTENT -180 -90 180 90

    LAYER
      NAME "sat"
      DATA "sat.tif"
      TYPE RASTER
      STATUS ON

      METADATA
                "wms_title" "sat"
      END

      PROJECTION
        "init=epsg:4326"
      END
      EXTENT 17.0473154408269387 62.1606759790530177 27.5792082876237146 66.7744046276809797

    END

END

I have also tried both without PROJECTION in LAYER and with
PROJECTION
     AUTO
END

None of them works.

EXTENT in the mapfile is taken from Qgis metadata of the layer.


Thanks
Jesper

Den tis 1 sep. 2020 kl 23:41 skrev Steve Lime <sdlime at gmail.com<mailto:sdlime at gmail.com>>:
What does the mapfile look like?

On Tue, Sep 1, 2020 at 10:26 AM Jesper Kempe <jesper.kempe at gmail.com<mailto:jesper.kempe at gmail.com>> wrote:
Hi

I have a GeoTiff file that gdalinfo presents like this:

gdalinfo sat.tif
Driver: GTiff/GeoTIFF
Files: sat.tif
Size is 10474, 10717
Coordinate System is `'
GCP Projection =
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
GCP[  0]: Id=1, Info=
          (0,0) -> (27.5783052509812,65.9184735836942,229.992792810313)
GCP[  1]: Id=2, Info=
          (524,0) -> (27.1416007200269,65.9731480840222,172.994255514815)
GCP[  2]: Id=3, Info=
          (1048,0) -> (26.7005564512604,66.0268770755367,152.994545626454)
GCP[  3]: Id=4, Info=
          (1572,0) -> (26.257537545879,66.0793551447287,131.994995356537)
GCP[  4]: Id=5, Info=
          (2096,0) -> (25.8102107755995,66.1308402121171,163.993212723173)
....

with 482 GCPs.


The file opens ok in Qgis and is located in the right location.
But I can´t in any way get it to show correctly in Mapserver.

Is this possible to do? Or do I have to gdalwarp the file to a known projection and set the PROJECTION of the layer?

Thanks
Jesper


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