AW: [OpenLayers-Users] WMS-layer: BBOX and SRS not being detected
Arnd Wippermann
arnd.wippermann at web.de
Fri Apr 22 17:49:40 EDT 2011
hi,
if you declare your map without options, then OL takes the default (see
Map.js):
projection: "EPSG:4326",
units: 'degrees',
maxResolution: 1.40625,
maxExtent: new OpenLayers.Bounds(-180,-90,180,90),
But it seems, when you declare a projection in your baselayer, then this
projection overwrites the map projection and is used for the SRS parameter
of the WMS request. But the maxExtent are still the default ones.
You should use map options to overwrite the default.
//set always mapOptions, if you use a projection other than EPSG:4326
mapOptions = {
projection: new OpenLayers.Projection("EPSG:28992"),
units: "m",
numZoomLevels: 18,
maxResolution: 5,
maxExtent: new OpenLayers.Bounds(131110,447700,131830,448310)
};
map = new OpenLayers.Map('map', mapOptions);
Arnd
_____
Von: openlayers-users-bounces at lists.osgeo.org
[mailto:openlayers-users-bounces at lists.osgeo.org] Im Auftrag von InterRob
Gesendet: Donnerstag, 21. April 2011 23:37
An: openlayers-users at lists.osgeo.org
Betreff: [OpenLayers-Users] WMS-layer: BBOX and SRS not being detected
Dear list,
Today I set up a MapServer WMS service. The service seems to work just fine,
as I tested it with QGIS. Even the SRS is recognized automatically:
EPSG:28992 (Dutch CS).
At the bottom of this message, I copy/pasted the GetCapabilites-response.
The bit of JavaScript used to load the OpenLayers control + map + layer, is
classical:
============
var map, layer;
function init(){
map = new OpenLayers.Map( 'map' );
layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&> &", { layers
: 'pgn_verwachting' }, { units : 'm', projection : new
OpenLayers.Projection("EPSG:28992"), singleTile : true, buffer : 0, ratio :
1 } );
============
In my browser, OpenLayers does load nicely (zoom and pan tools become
available in the upper right corner of an empty map-div) and then does the
following GET to fetch that single tile:
http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&LAYERS=pgn_ver
wachting&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&FORMAT=image%2Fjpe
g&SRS=EPSG%3A28992&BBOX=-281.25,-210.9375,281.25,210.9375&WIDTH=800&HEIGHT=6
00>
&LAYERS=pgn_verwachting&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&FOR
MAT=image%2Fjpeg&SRS=EPSG%3A28992&BBOX=-281.25,-210.9375,281.25,210.9375&WID
TH=800&HEIGHT=600
I don't see how I can get the BBOX parameter right... What am I missing?
When I edit the above URL, it works just fine, obviously...
And shouldn't the SRS be detected automatically as well?
Hints are much appreciated!
Kind regards,
Rob
=============== GetCapabilities response ======================
<?xml version='1.0' encoding="ISO-8859-1" standalone="no" ?>
<!DOCTYPE WMT_MS_Capabilities SYSTEM
"http://schemas.opengis.net/wms/1.1.1/WMS_MS_Capabilities.dtd"
[
<!ELEMENT VendorSpecificCapabilities EMPTY>
]> <!-- end of DOCTYPE declaration -->
<WMT_MS_Capabilities version="1.1.1">
<!-- MapServer version 5.6.6 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP
OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=ICONV
SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER
SUPPORTS=WFS_CLIENT SUPPORTS=FASTCGI SUPPORTS=THREADS SUPPORTS=GEOS
INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE -->
<Service>
<Name>OGC:WMS</Name>
<Title>Beleidskaart_Binnenstad</Title>
<OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&> &"/>
<ContactInformation>
</ContactInformation>
</Service>
<Capability>
<Request>
<GetCapabilities>
<Format>application/vnd.ogc.wms_xml</Format>
<DCPType>
<HTTP>
<Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Get>
<Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Post>
</HTTP>
</DCPType>
</GetCapabilities>
<GetMap>
<Format>image/gif</Format>
<Format>image/png</Format>
<Format>image/png; mode=24bit</Format>
<Format>image/jpeg</Format>
<Format>image/vnd.wap.wbmp</Format>
<Format>image/tiff</Format>
<Format>image/svg+xml</Format>
<DCPType>
<HTTP>
<Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Get>
<Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Post>
</HTTP>
</DCPType>
</GetMap>
<GetFeatureInfo>
<Format>text/plain</Format>
<Format>application/vnd.ogc.gml</Format>
<DCPType>
<HTTP>
<Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Get>
<Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Post>
</HTTP>
</DCPType>
</GetFeatureInfo>
<DescribeLayer>
<Format>text/xml</Format>
<DCPType>
<HTTP>
<Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Get>
<Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Post>
</HTTP>
</DCPType>
</DescribeLayer>
<GetLegendGraphic>
<Format>image/gif</Format>
<Format>image/png</Format>
<Format>image/png; mode=24bit</Format>
<Format>image/jpeg</Format>
<Format>image/vnd.wap.wbmp</Format>
<DCPType>
<HTTP>
<Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Get>
<Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Post>
</HTTP>
</DCPType>
</GetLegendGraphic>
<GetStyles>
<Format>text/xml</Format>
<DCPType>
<HTTP>
<Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Get>
<Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&>
&"/></Post>
</HTTP>
</DCPType>
</GetStyles>
</Request>
<Exception>
<Format>application/vnd.ogc.se_xml</Format>
<Format>application/vnd.ogc.se_inimage</Format>
<Format>application/vnd.ogc.se_blank</Format>
</Exception>
<VendorSpecificCapabilities />
<UserDefinedSymbolization SupportSLD="1" UserLayer="0" UserStyle="1"
RemoteWFS="0"/>
<Layer>
<Name>Beleidskaart_Binnenstad</Name>
<Title>Beleidskaart_Binnenstad</Title>
<Abstract>Beleidskaart_Binnenstad</Abstract>
<SRS>EPSG:28992</SRS>
<LatLonBoundingBox minx="5.03953" miny="52.0181" maxx="5.05006"
maxy="52.0236" />
<BoundingBox SRS="EPSG:28992"
minx="131110" miny="447700" maxx="131830" maxy="448310" />
<Layer queryable="0" opaque="0" cascaded="0">
<Name>pgn_verwachting</Name>
<Title>pgn_verwachting</Title>
<LatLonBoundingBox minx="5.04025" miny="52.0182" maxx="5.04993"
maxy="52.0236" />
<BoundingBox SRS="EPSG:28992"
minx="131160" miny="447707" maxx="131821" maxy="448305"
/>
<Style>
<Name>default</Name>
<Title>default</Title>
<LegendURL width="147" height="41">
<Format>image/png</Format>
<OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:type="simple"
xlink:href="http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map
<http://localhost/mapserv?map=/var/www/geo/binnenstad_wms.map&version=1.
1.1&service=WMS&request=GetLegendGraphic&layer=pgn_verwachting&a
mp;format=image/png&STYLE=default>
&version=1.1.1&service=WMS&request=GetLegendGraphic&layer=pg
n_verwachting&format=image/png&STYLE=default"/>
</LegendURL>
</Style>
</Layer>
</Layer>
</Capability>
</WMT_MS_Capabilities>
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