[UMN_MAPSERVER-USERS] Help with MAP File

[Skweda O'Bomsawin]

Exactly.  You need a projection block in your map section and another
projection block in your layer section.  The PROJECTION block of the map
section is for reprojection on-the-fly feature of Mapserver.  This means you
can choose in which projection you want to display your date in this
section.  The PROJECTION block of the layer is the current projection of
your data (you must know the current projection of your data and specify it
there).  

If you specify that your units are in meters, that means you must specify a
projection (not latlong).  The most usual projection for units in meters is
UTM.  Here is a sample PROJECTION block for UTM:

        PROJECTION
        "proj=utm"
        "ellps=GRS80"
        "zone=15"
        "north"
        "no_defs"
      END

Parameters of the PROJECTION block are simply proj4 parameters.  I recommend
you take a look at http://mapserver.gis.umn.edu/coordinates.html and
http://www.remotesensing.org/proj/

Hope this will help!

Skweda O'Bomsawin

-----Message d'origine-----
De : UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] De la
part de Pablo Toapanta
Envoyé : 24 septembre 2004 09:29
À : MAPSERVER-USERS at LISTS.UMN.EDU
Objet : [UMN_MAPSERVER-USERS] Help with MAP File

Hi

This is my map file:

MAP
  IMAGETYPE      PNG
  EXTENT         495591.176607842 9972721.25772341
505382.102073711 9984983.97959341
  SIZE           1000 800
  SHAPEPATH      "data"
  IMAGECOLOR     255 255 255
  UNITS meters

  PROJECTION
  #  "proj=latlong"
  # "ellps=clrk66"
  #  "lat_0=0"
  #  "lon_0=0"
  #
  # Alternatively, you can specify an EPSG code.
  # "init=epsg:2163"
  #
  END

  # Start of LAYER DEFINITIONS --------------------
  LAYER # States polygon layer begins here
    NAME         states
    DATA         quiton45
    STATUS       ON
    TYPE         POLYGON

    PROJECTION
#"proj=latlong"
#"init=epsg:4326"
    END

    CLASS
      COLOR        232 232 232
      OUTLINECOLOR 32 32 32
    END
  END # States polygon layer ends here
  # End of LAYER DEFINITIONS -------------------------

END # end of map file/object

I think that the problem is with the extent or the
projection. Please help me with this, it´s very
important. I don´t know how to obtain the correct
extent.

Thanks
Pablo Toapanta N.

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