Hi, Have you double-checked that your map extent correspods with the map projection? Or if you could send your whole mapfile I am pretty sure that you will get a final answer to your problem.
-Jukka Rahkonen- > -----Alkuperäinen viesti----- > Lähettäjä: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Puolesta > Monier Clement > Lähetetty: 27. lokakuuta 2008 13:39 > Vastaanottaja: 'Pietro Giannini'; [email protected] > Aihe: RE: [mapserver-users] projection = geographer's pain > > > Thanks for your answers Roger & Pietro. > > I've followed your advice by trying these 4 test-cases : > > 1) > Map proj set to : "init=epsg:3785" (web spherical Mercator, > manually added > into espg file) > Layer proj set to : "init=epsg:4326" (latlon wgs84, proj system of my > shapefiles) > > => got a blank map > > 2) > Map projection set to : "init=epsg:4326" > Layer projection set to : "init=epsg:4326" > > => got a map > > 3) > Map projection set to : "init=epsg:3785" > Layer projection set to : "init=epsg:3785" > > => got the same map as 2) > > 4) > Map projection set to : "init=epsg:4326" > Layer projection set to : "init=epsg:3785" > > => got a blank map > > I've also tried with another well-known existing epsg > proj-system (instead of the manually-added 3785 code), but > got the same results. > I've made other attempts by replacing "init=3785" by full > description proj-string like "+proj=longlat +ellps=WGS84 > +datum=WGS84 +no_defs no_defs" > or "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 > +x_0=0.0 +y_0=0 > +k=1.0 +units=m [EMAIL PROTECTED] no_defs" > But it didn't change anything... > > It seems that : > - a map is drawn only if the map's and layer's proj-systems > are the same. > - the output projection is always overridden by the shapefile > system, no re-projection is done anyway. > > Let me know if you have any further leads to solve this issue. > > Thanks for your help > > Clément > > -----Message d'origine----- > De : [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] De la part > de Pietro Giannini Envoyé : vendredi 24 octobre 2008 21:40 À > : [email protected] Objet : Re: > [mapserver-users] projection = geographer's pain > > I can confirm that projection is often a pain! > > However, the problem may be in the projection of the layer. > > The PROJECTION section in a layer declare the projection of > the data source of this layer, while the PROJECTION on the > map level is the projection wich you want to show the whole > map. So you can overlay more data sources in different > projection in a single map. > > Try to set the layer PROJECTION as "init=epsg:4326". > Let us know... > ciao > ........................... pg > > > -- > Pietro Giannini > Bytewise srl - Area GIS > 41°50'38.58"N 12°29'13.39"E > > > > > On Ven, Ottobre 24, 2008 16:55, Monier Clement wrote: > > Hi, > > > > > > > > I'm running MS4W v2.2.8 (including MapServer 5.2) on windows. > > > > My datasource is shapefiles with WGS84 projection (epsg:4326). > > > > I would like MapServer to render these data into a "Web (spherical) > > Mercator" projected map (epsg:3785) in order to perfectly > overlay the > > GoogleMaps tile images (for the moment, my maps are slightly shifted > > north.) > > > > > > > > I've added this string at the end of the file "epsg" in > /ms4w/proj/nad : > > > > <3785> +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 > +lon_0=0.0 +x_0=0.0 > > +y_0=0 +k=1.0 +towgs84=0,0,0,0,0,0,0 +units=m > [EMAIL PROTECTED] +no_defs <> > > > > > > > > But I don't know how to modify my request and mapfile in > order to get the > > correct map. > > > > I've tried many combinations so far but with no success until now. > > > > > > > > Do I have to change the projection system of my shapefiles ? > > > > Is MapServer able to change projection between input and output ? > > > > > > > > Request : "&SRS=epsg:3785" > > > > > > > > MapFile : > > > > > > > > [Map section] > > > > METADATA > > > > "wms_srs" "EPSG:4326 EPSG:3785" # is this correct ? > > > > END > > > > > > > > PROJECTION > > > > "init=epsg:3785" # is this correct ? > > > > END > > > > > > > > [Layer section] > > > > METADATA > > > > "wms_srs" "EPSG:3785" # is this correct ? > > > > END > > > > PROJECTION > > > > "init=epsg:3785" # is this correct ? > > > > END > > > > > > > > With these settings, the pictures I got from MapServer are > still shifted. > > > > > > > > Thanks for your help > > > > > > > > Clement > > > > > > > > _______________________________________________ > > mapserver-users mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > > > > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users > _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
