[mapserver-users] EPSG 27493

[Jeff McKenna]

Hello Luis,

Don't worry, I too have many problems between my chair and my keyboard.

You must tell MapServer where to draw the map data, in the extents and units
of your output projection (yes 27493: meters).  So your mapfile would look
something like:  

MAP
  NAME "DEMOSMC"
  ...
  EXTENT                                        #extents in meters
(EPSG:27493)
  ...
  PROJECTION
    "init=epsg:27493"
  END 

  LAYER 
    NAME         "distritos"
    ...
    CLASS
      ...
    END
    PROJECTION
      "init=epsg:4274"
    END 
  END
END #mapfile

If you are wondering how you would get the EXTENT values in meters from that
EPSG:27493; a trick I use is to use ogr2ogr command to create a shapefile in
EPSG:27493, from your Oracle layer.  (see the parameters "s_srs" and "t_srs"
at http://www.gdal.org/ogr2ogr.html).  Then once you have that shapefile you
can execute an ogrinfo on it to get the extents, and use that in your
mapfile (in the blank EXTENT in my example above).

Hopefully that makes it clear.

-jeff

-- 
Jeff McKenna
MapServer Consulting and Training Services
http://www.gatewaygeomatics.com



luisbap wrote
> 
> My data is in oracle spatial in SRID:4274 (degrees) but I want to project
> it in EPSG:27493 (meters). Should I define an extent area with values
> related to the output projection, in meters and not in degrees?
> Or should I do something else to see my data?
> 


--
View this message in context: http://osgeo-org.1560.n6.nabble.com/EPSG-27493-tp4982999p4984385.html
Sent from the Mapserver - User mailing list archive at Nabble.com.