[mapserver-users] OpenLayers & Projection

[Clemiou]

Hi!

I provide you my OpenLayers code.

function init()
        {
            OpenLayers.DOTS_PER_INCH = 72;
            
            // --------------------------------------------------------------------------//
            // Tableau des options pour la carte.                                          //
            // La plus importante est scales qui permet de definir les différents zooms  //
            // qui seront disponibles pour l'utilisateur.                                //
            // --------------------------------------------------------------------------//
            
            var options = 
            {
                 scales: [3500000, 3000000,2500000,2000000,1500000,1000000,350000,250000],
                 maxScale: 250000,
                 minScale: 3500000,
                 controls: [new OpenLayers.Control.MouseDefaults()]
            };
             
            // -------------------------//
            // Création de l'objet map. //
            // -------------------------//
                          
            map = new OpenLayers.Map( 'map',options);
            
            // ----------------------------------------------//
            // On ajoute les couches après les avoir créées. //
            // ----------------------------------------------// 
            
            layer = new OpenLayers.Layer.MapServer( "OpenLayers WMS", 
                    "http://localhost/cgi-bin/mapserv?mode=map&map=/var/www/html/ms/map_files/france.map", {layers: ['FRANCE','CORSE']},
                    {gutter: 0    });
                        
            map.addLayer(layer);
                     
            
        }

            // -----------------------------------------------------------------------//
            // Ajout de la barre de zoom et des coordonnées de la position actuelle.  //
            // -----------------------------------------------------------------------//
          
            map.addControl( new OpenLayers.Control.PanZoomBar() );
            
            // ------------------------------//
            // Ajout de la gestion du click. //
            // ------------------------------//
           
               var click = new OpenLayers.Control.Click();
                map.addControl(click);
                click.activate();
            
            // ---------------------------------------------------------------------------//
              // Et on définit le centre de notre carte, afin qu'elle sot bien positionnée. //
              // ---------------------------------------------------------------------------//
              
            map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);

And my mapfile has the good projections block, one for the map and one for each layer. Consequently, it works with mapserver & without OL.

Regards.

Clement



> Date: Tue, 29 Apr 2008 15:43:32 -0400
> From: jlacroix at mapgears.com
> To: clems_mars at hotmail.com
> CC: mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] OpenLayers & Projection
> 
> Hi,
> 
> You can take a look at how projection are set in OpenLayers:
> 
> http://trac.openlayers.org/wiki/FrequentlyAskedQuestions#Projections
> 
> Or at the Source of the OpenLayers projection example:
> http://www.openlayers.org/dev/examples/projected-map.html
> 
> You will also need to define the PROJECTION block at the layer level and 
> at the map level in your mapfile.
> 
> Julien
> 
> PS: Please provide revelent mapfile part and revelent code when asking a 
> question it will help us figuring out what may be your problem.
> 
> Clemiou wrote:
> > Hi all!
> >  
> > I come back here because I always have the same problem.
> > So, I have a .ewc file which represent the France. This file is in Lambert II (French position, centered on France).
> > Currently, I display this map with WGS84 projection but naturally, my map is distorded because this projection is centered on the equator.
> > So, if I try to displaying my map with the Lambert II projection, I obtain the following figure:
> >  
> > http://www.forumsig.org/attachment.php?attachmentid=2286&stc=1&d=1208951661 <http://www.forumsig.org/attachment.php?attachmentid=2286&stc=1&d=1208951661>
> >  
> > As you can see, there is a malfunction=> the repetition of a part of each tile.
> >  
> > I tried to add projection and units options to my map but nothing change. I think that is a OpenLayers probleme because my map is correctly display with Mapserver and without OL.
> > Perhaps someone here should help me.
> > 
> > Thanks for your futur help and once more, excuse me for my English.
> >  
> > Have a nice day
> >  
> > Clement
> > 
> > 
> > ------------------------------------------------------------------------
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> > 
> > ------------------------------------------------------------------------
> > 
> > _______________________________________________
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> 
> -- 
> Julien-Samuel Lacroix
> Mapgears
> http://www.mapgears.com/

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