WMS and reprojection

Thu May 26 05:56:18 EDT 2005

Hi Paul,

I think you're right, and my data have good projection coord
with WFS server.

Here is my WMS server's Mapfile :

Server 1 (epsg 27582) :

#############################################################################################################################################################################################################################################################
##MAP########################################################################################################################################################################################################################################################
#############################################################################################################################################################################################################################################################

MAP

NAME France_WFS_L2
EXTENT 47700 1620400 1197900 2677200
IMAGETYPE gif
SIZE 800 600
SHAPEPATH "data"

DEBUG ON

OUTPUTFORMAT
NAME gif
MIMETYPE "image/gif"
DRIVER "GD/GIF"
EXTENSION "gif"
IMAGEMODE PC256
TRANSPARENT TRUE
END

PROJECTION
"init=epsg:27582"
END

#######
##WEB##
#######

WEB
log "./tmp/France_Lambert2.log"
IMAGEPATH
"C:/ms4w/Apache/htdocs/projection/Serveur_France/tmp/"
TEMPLATE 'Donnees_test_WMS_WFS_template.html'
IMAGEURL "http://10.133.110.29/projection/Serveur_France/tmp/"
METADATA
"wfs_title" "France_WFS_test"
"wfs_onlineresource"
"http://10.133.110.29/cgi-bin/mapserv.exe?map=C:/ms4w/Apache/htdocs/projection/Serveur_France/France_L2_WFS.map&"
"wfs_schemas_location" "http://ogc.dmsolutions.ca"
"wfs_srs" "epsg:27582"
END

END

#############
##France_L2##
#############

LAYER
NAME "France_L2_WFS"
DATA "France_L2"
STATUS ON
TYPE POLYGON
DUMP TRUE
TEMPLATE "query.html"
TOLERANCE 3
TOLERANCEUNITS PIXELS

METADATA
"wfs_title" "France_L2_WFS"
END

CLASS
COLOR 200 231 193
OUTLINECOLOR 32 32 32
END

END

END

Server 2 (epsg 4326) :

#############################################################################################################################################################################################################################################################
##MAP########################################################################################################################################################################################################################################################
#############################################################################################################################################################################################################################################################

MAP

NAME Europe_WFS_Name
EXTENT -34.5523788 26.2114230 72.2516881 83.340374
#EXTENT -4760555 -1058700 4505870 8245049
IMAGETYPE gif
SIZE 800 600
SHAPEPATH "data"

PROJECTION
"init=epsg:4326"
#"init=epsg:27582" #PROJ L2
END

DEBUG ON

OUTPUTFORMAT
NAME gif
MIMETYPE "image/gif"
DRIVER "GD/GIF"
EXTENSION "gif"
IMAGEMODE PC256
TRANSPARENT TRUE
END

#######
##WEB##
#######

WEB
log "/tmp/Europe_WGS84.log"
IMAGEPATH
"C:/ms4w/Apache/htdocs/projection/Serveur_Europe/tmp/"
TEMPLATE 'Donnees_test_WMS_WFS_template.html'
IMAGEURL "http://10.133.110.29/projection/Serveur_Europe/tmp/"
METADATA
"wfs_title" "Europe_WFS_WEB"
"wfs_onlineresource"
"http://10.133.110.29/cgi-bin/mapserv.exe?map=C:/ms4w/Apache/htdocs/projection/Serveur_Europe/Europe_WFS.map&"
"wfs_srs" "epsg:27582"
"wfs_schemas_location" "http://ogc.dmsolutions.ca"
END

END

##########
##Europe##
##########

LAYER
NAME "Europe_WFS"
DATA "Europe_region"
STATUS ON
TYPE POLYGON
DUMP TRUE
TEMPLATE "query.html"
TOLERANCE 3
TOLERANCEUNITS PIXELS

METADATA
"wfs_title" "Europe_WFS"
END

CLASS
COLOR 0 231 193
OUTLINECOLOR 32 32 32
END

END

END

This is my 2 Mapfiles. If I give the same output projection to
my 2 WMS server and my WMS client, all data superimpose with
the right coordinates.

But if it's not the fact, all data are like in the jpeg join
with the mail.

If you see somethink strange, thank you a lot for the help

Vincent

> Hello Vincent,
>
> I did not have a look at the whole thread when I first replied.
> In fact, as Ed suggested, it would be very usefull if you
could post the mapfiles you are using to the list.
> I don't think there is any PROJ.4 related problem (as long
as your projection definitions are correct) but more likely a
> misconfiguration in one of your mapfiles as you wrote that
you can properly display all layers if they are accessed
> locally and referenced in a single mapfile. Am I right?
>
> Paul
>
> -----Original Message-----
> From: UMN MapServer Users List
[mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of vincent.dacol
> Sent: Thursday, May 26, 2005 10:52 AM
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: Re: [UMN_MAPSERVER-USERS] WMS and reprojection
>
> Thanks for the help and the idea.
>
> I don't know if it is abble to solve my problem, I have try
to decribe the projection like you said, but T don't have
> any change one screen :(
>
> I give you a "impscreen" with a visualisation of my probleme.
> But it seem it's a PROJ4 pb.
>
> A strange think, all work great when I use WFS server with
the same projection as my WMS server. All layer display at
> the right place (except the europe layer who is not display
because he use an other projection unit). Strange isn't
> it???
>
> have a nice day,
>
> Vincent
>
>
>
> > Hello Vincent,
> >
> > I would suggest that you describe the projection in your
> mapfile, at least for debug purposes.
> > If you have a prj file coming e.g. with Arcgis, it is fairly
> easy.
> > Then you avoid using +pm=paris and specify lon_0.
> >
> > For this WKT definition (probably equivalent to a LambertIIE):
> >
>
PROJCS["France_IMAGE2000",GEOGCS["GCS_NTF",DATUM["D_NTF",SPHEROID["Clarke_1880_IGN",6378249.2,293.46602]],PRIMEM["Greenw
> >
>
ich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",600000.0],P
> >
>
ARAMETER["False_Northing",2200000.0],PARAMETER["Central_Meridian",2.337229166666667],PARAMETER["Standard_Parallel_1",45.
> >
>
898919],PARAMETER["Standard_Parallel_2",47.696014],PARAMETER["Latitude_Of_Origin",46.8],UNIT["Meter",1.0]]
> >
> > I am using this projection section in my mapfile:
> >   PROJECTION
> >     "proj=lcc"
> >     "ellps=clrk80"
> >     "lat_1=45.898919"
> >     "lat_2=47.696014"
> >     "lat_0=46.8"
> >     "lon_0=2.337229166666667"
> >     "x_0=600000.0"
> >     "y_0=2200000.0"
> >     "units=m"
> >     "no_defs"
> >   END
> >
> > Also check whether or not you need to use the +towgs84
> parameter...
> >
> > HTH
> > Paul
> >
> > -----Original Message-----
> > From: UMN MapServer Users List
> [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of
vincent.dacol
> > Sent: Thursday, May 26, 2005 9:17 AM
> > To: MAPSERVER-USERS at LISTS.UMN.EDU
> > Subject: Re: [UMN_MAPSERVER-USERS] WMS and reprojection
> >
> > Hi Francois,
> >
> > I have found what doesn't really work in my WMS server. The
> reprojection really work well now. But the probleme is the
> > (x,y) position the differents layers who are in local French
> epsg projection system. All are not at the right place.
> >
> > I think it's a problem of PROJ4 epsg definition. But I don't
> realy know how solve it.
> >
> > Have you some tips or technique to resolve that sort of
problem?
> >
> > Thank for your help.
> >
> > Vincent
> >
> >
> >
> >
> > > Hi (again) Vincent,
> > >
> > > If you have a look to epsg file contained in proj 4.4.9
> > package :
> > > # NTF (Paris) / Lambert zone II
> > > <27572> +proj=lcc +lat_1=46.8 +lat_0=46.8 +lon_0=-2.33722917
> > +k_0=0.99987742
> > > +x_0=600000 +y_0=2200000 +a=6378249.2 +b=6356515
> > > +towgs84=-168,-60,320,0,0,0,0 +pm=paris +units=m
+no_defs  <>
> > > # NTF (Paris) / France II
> > > <27582> +proj=lcc +lat_1=46.8 +lat_0=46.8 +lon_0=-2.33722917
> > +k_0=0.99987742
> > > +x_0=600000 +y_0=2200000 +a=6378249.2 +b=6356515
> > > +towgs84=-168,-60,320,0,0,0,0 +pm=paris +units=m
+no_defs  <>
> > >
> > > Looks the same ... If you look to Lambert II Etendu (ie.
> > France II)
> > > parameters
> > >
> >
>
http://www.ign.fr/telechargement/education/fiches/geodesie/projections.pdf
> > > It seems that for Lambert II zone 27572, y_0 should be
> > 200000 and lon_0, 0 ?
> > > And for France II lon_0 should be 0 ! Anyone using French
> > coordinate systems
> > > having the same troubles ?
> > >
> > > I'm currently using these parameters for France II.
> > > <27582> +proj=lcc +lat_1=46.8 +lat_0=46.8 +lon_0=0
> > +k_0=0.99987742
> > > +x_0=600000 +y_0=2200000 +a=6378249.2 +b=6356515
> > > +towgs84=-168,-60,320,0,0,0,0 +pm=paris +units=m
+no_defs  <>
> > >
> > > Any ideas ?
> > >
> > > Francois
> > >
> > > > -----Message d'origine-----
> > > > De : UMN MapServer Users List
> > > [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] De la
> > > > part de vincent.dacol
> > > > Envoyé : mercredi 25 mai 2005 11:40 À :
> > > > MAPSERVER-USERS at LISTS.UMN.EDU Objet :
[UMN_MAPSERVER-USERS] WMS
> > > > and reprojection
> > > >
> > > > Hi everybody,
> > > >
> > > > I'm a student and I'm disovering the world of
Mapserver and
> > > > interoperabillity.
> > > >
> > > > I'm trying to use 2 WMS services in different projections,
> > > and one client to
> > > > display two layer from that server.
> > > >
> > > > But the reprojection didn't work in the client. The 2
layer
> > > obtain with the
> > > > 2 WMS server aren't display in the same projection.
> > > >
> > > > The projection of my WMS server 1 is "init=epsg:27571"
> > > > The projection of my WMS server 2 is "init=epsg:27582"
> > > >
> > > > This two server can serv :
> > > > "wms_srs"      "EPSG:27582 EPSG:27571"
> > > >
> > > > The projection I want to display with the client is
> > > "init=epsg:27582"
> > > >
> > > > When I use the 2 layers in local, there is no
supperposition
> > > problem, the
> > > > picture obtain was fine, the reprojection work.
> > > >
> > > > But with the WMS client, the first layer is in it's own
> > > projection, and the
> > > > second too. So the 2 layer arn't supperposed, it seem
there
> > > is no
> > > > reprojection.
> > > >
> > > > Is-it a reprojection probleme?
> > > >
> > > > My opignon is that a single mapfile with multiple
> > > connections to different
> > > > WMS server must only connect to server who are in the same
> > > projection.
> > > >
> > > > Maybe I'm wrong, I really new to Mapserver, but I have
spend
> > > a lot of time
> > > > one this probleme, and the only solution I have find the
> > > solve it is to use
> > > > the same output projection in the client and in the WMS
> > server.
> > > >
> > > > But this solution isn't very logical for me. I want to
> > > connect to a server
> > > > who use is own projection, and can serve data in other
> > > predefined EPSG
> > > > projection. So a WMS client use a WMS layer has a local
> > > layer, with is own
> > > > projection output, and is abble to reproject the data
obtain
> > > in the WMS
> > > > layer.
> > > >
> > > >
> > > > Thanks for the help (I really need it).
> > > >
> > > > Vincent
> > > >
> > > > Accédez au courrier électronique de La Poste :
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> > > >
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> > >
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> > > partielle, doit etre autorisee.
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> > > confidential and secret. Any total or partial publication,
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> > > distribution must be authorized.
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> > >
> > > Les donnees et renseignements contenus dans ce message sont
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> > is personal, confidential and secret. Any total or partial
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> > >
> >
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