[MAPSERVER-USERS] cs2cs problems

[Rahkonen Jukka]

Hi Carla,
 
Please remember to use "reply to all" in order to send your message for the mailing list as well.  
 
 I hope I understand this  correctly. So your original data (the shapefile) is in epsg:23030? Then you should have in mapfile, in corresponding LAYER section
PROJECTION
"init=epsg:23030"
END
 
Next, because you are willing to deliver that layer through WMS in epsg:4230, it is good to add this to layer METADATA as 
"wms_srs"    "EPSG:4230"
 
By looking at my old mapfiles wms_srs metadata seems not to be compulsory if WMS service will only be used in one output projection which is the same as the main MAP projection.  Anyway I believe it would be good habbit to have it.
 
Third, you should give the default output projection in MAP section as
PROJECTION
    "init=epsg:4230" 
END
 
And last calculate the bounding box containing your data in the mapfile projection (epsg:4230) and feel in the values as EXTENT of the map object.
 
I try to read your messages once again faithfully and I feel you are giving a bit conflicting information. In one place you say you are willing to publish your data in ETRS89, wich I believe to mean epsg:4258.  If this is the case then insert that value to "wms_srs" and mapfile projection instead of 4230.  Why do you play at all with epsg:4230 if your data are not using it, and you don't want to any output in that projection either?  Perhaps I have just not understood what you are aiming at, but I hope you will have luck with it.
 
-Jukka Rahkonen-
 
 


________________________________

	Lähettäjä: CARLA FERNANDEZ [mailto:carla.fernandezb at gmail.com] 
	Lähetetty: 18. maaliskuuta 2008 11:50
	Vastaanottaja: Rahkonen Jukka
	Aihe: Re: [MAPSERVER-USERS] cs2cs problems
	
	
	Thanks four your answer,
	
	I've defined projections in my WMS before without problems. In this case I want to change the projection of my WMS (to ETRS89) with the layers in ED50, but if I just set the projection of the header's mapfile like ETRS89, and I leave the  layers' projections like ED50, it doesn't work :( 
	
	
	Do you have any idea of how can I use the cs2cs??
	
	Thanks!!
	
	
	
	
	
	
	2008/3/17, Rahkonen Jukka <Jukka.Rahkonen at mmmtike.fi>: 

		Hi,
		
		I you want to define projections in mapfile then there are two alternatives:
		either give the espg code:
		
		PROJECTION
		          "init=epsg:2393"
		END
		
		or proj4 strings:
		
		PROJECTION
		"+proj=tmerc +lat_0=0 +lon_0=27 +k=1.000000 +x_0=3500000
		+y_0=0 +ellps=intl +towgs84=-90.7,-106.1,-119.2,4.09,0.218,-1.05,1.37
		+units=m +no_defs"
		END
		
		But perhaps you are aiming at something else by using cs2cs?
		
		-Jukka Rahkonen-
		
		-----Alkuperäinen viesti-----
		Lähettäjä: mapserver-users-bounces at lists.osgeo.org puolesta: cfb
		Lähetetty: ma 17.3.2008 15:49
		Vastaanottaja: mapserver-users at lists.osgeo.org
		Aihe: [MAPSERVER-USERS] cs2cs problems
		
		
		
		Hi,
		
		I'm having problems with the projection again. I've got a shape in
		epsg:23030 (ED50 UTM 30N), but I want to set my service in epsg:4230
		(ETRS89). I've changed the extent, the "wms_boundingbox" and the
		"wms_latlonboundingbox" of my header's mapfile to geographic coordinates
		(epsg:4230 for ED50), and in the projection object (always in the header, in
		the layer object I leave epsg:23030) I put:
		
		PROJECTION
		   'cs2cs +from +init=epsg:4230 +to +proj=4258 +no_defs +no_defs +no_defs
		+no_defs +ellps=GRS80 +datum=ETRS89 +no_defs +units=m'
		END http://www.nabble.com/file/p16092875/epsg epsg
		
		For the second reference system, I've also tried with "+proj=longlat" and
		with "+init=epsg:4258", but I get always the same error:
		
		msProcessProjection(): Projection library error. projection not named
		
		The epsg file of my proj4 is attached (ms4w v. 2.2.7, MapServer 5.0.2)
		
		Thanks in advance!!
		
		
		--
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