AW: [OpenLayers-Users] wrong displayed projection

[Arnd Wippermann]

Hi,

Your layer declarations are a bit out of order.

lyrWMS = new OpenLayers.Layer.WMS(title, url, paramsWMS, lyrOptions)
lyrMS  = new OpenLayers.Layer.MapServer(title, url, paramsMS, lyrOptions)

Params are added to the server request, options are instructions for
OpenLayers.

paramsWMS = {
    map:'/home/banm/maps/minimal.map',
    layers:'0605',
    format:'image/png',
    transparent:true
}
WMS layers are explicit regarded as BaseLayers
if the param "transparent" and the option "isBaseLayer" is not set. 

paramsMS = {
    map:'/home/banm/maps/minimal.map',
    layers:'0605',
    map_imagetype:'png'
}

lyrOptions = {
    isBaseLayer: false,
    visibility:true,
    opacity:1.0
}

Your Mapfile should hold some more informations. 

In the layerblocks are the projection of the data not set.
PROJECTION
  "init=epsg:4326"
END

In the metadata block you should set
wms_srs 'EPSG:4326 EPSG:900913'
to support a reprojection with MapServer for these projections.

You should do a WMS GetCapabilities Request for your services to get some
configuration informations like: 

<!-- WARNING: Mandatory mapfile parameter '(at least one of) MAP.PROJECTION,
LAYER.PROJECTION or wms_srs metadata' was missing in this context. -->

Request:
http://biomaps.unideb.hu/cgi-bin/mapserv?map=/home/banm/maps/minimalp.map&Se
rvice=WMS&Request=GetCapabilities&Version=1.1.1


If you do these modifications, your postgis layer should also displayed at
the right position.
But you should declare it as OpenLayers.Layer.WMS.

Best luck
Arnd




-----Ursprüngliche Nachricht-----
Von: openlayers-users-bounces at lists.osgeo.org
[mailto:openlayers-users-bounces at lists.osgeo.org] Im Auftrag von Bán Miklós
Gesendet: Freitag, 27. Januar 2012 07:28
An: openlayers-users at lists.osgeo.org
Betreff: [OpenLayers-Users] wrong displayed projection

Dear all,

I have a problem with projections in wms layers, I have two wms layers from
mapserv and i have two data sources an shp and a postgis. I produced the
postgis table from the shp.
When I load these two layers in qgis, they are overlapping as I expected,
but if you check it here
(http://biomaps.unideb.hu/openlayers/mapserv_test.html) the postgis layer
center is 0,0 while the shp data layer is right.



Where is the error?

Thank you very much, Miklos

The related openlayers js (I willing to use google base layers...)

var options = {
     projection: new OpenLayers.Projection("EPSG:900913"),
     displayProjection: new OpenLayers.Projection("EPSG:4326"),
     units: "m",
     numZoomLevels: 20,
     maxResolution: 156543.0339,
     maxExtent: new OpenLayers.Bounds(-20037508, -20037508,
                                 20037508, 20037508.34), };

map = new OpenLayers.Map( 'map',options);
            
layer2 = new OpenLayers.Layer.WMS( "shp", 
                    "http://biomaps.unideb.hu/cgi-bin/mapserv",{
                    map:'/home/banm/maps/minimal.map',layers:'0605',
                    isBaseLayer: false,
                    visibility:true,
                    opacity:1.0,
                    format:'image/png',
                    //transparent:true, 
            });
layer2p = new OpenLayers.Layer.MapServer( "postgis", 
                    "http://biomaps.unideb.hu/cgi-bin/mapserv", {
                    map: '/home/banm/maps/minimalp.map',
                    layers:'cuckoo_feszkek',
                    isBaseLayer: false,
                    visibility:true,
                    opacity:1.0,
                    format:'image/png',
                    transparent:true,
            });



the shp mapfile:
MAP
  NAME "QGIS-MAP"
  SIZE 200 200
  SYMBOLSET ./points.sym
  DEBUG 0
  SHAPEPATH "../SHP/"
  PROJECTION
    "init=epsg:4326"
  END
  WEB
    IMAGEPATH '/tmp/'
    IMAGEURL '/tmp/'
  END
  IMAGEQUALITY 95
  IMAGETYPE agg
  OUTPUTFORMAT
    NAME agg
    DRIVER AGG/PNG
    IMAGEMODE RGB
  END
  LAYER
    name "0605"
    STATUS DEFAULT
    DATA "feszkek.shp"
    TYPE point
    CLASS
        SYMBOL "circle_filled"
        color 123 70 23
        SIZE 6
    END #class
  END
END


The postgis layer:
  layer
    name 'feszkek'
    status default
    type point

    connectiontype postgis
    connection "host=localhost dbname=** password=**
    user=gisadmin" data "the_geom from feszkek"

    class
      SYMBOL "circle_filled"
      color 12 70 23
      SIZE 6
    end
  end




--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Miklós Bán
Behavioural Ecology Research Group
Department of Evolutionary Zoology
http://vocs.unideb.hu/banm
University of Debrecen
H-4010 Debrecen, Egyetem tér 1.
Phone:  +36 52 512-900 ext. 62356
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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