On 1/9/2013 5:49 PM, Alexander Kocisky wrote:
Hi all,
I've set up a Geoserver/PostGIS infrastructure in order to render a
database of GIS information. Initially i was working with the projection
4326 but when i've installed Drupal + OpenLayers i've realized that
there are almost no tiles with this projection, the way to go seems the
projection 900913.
So i've converted all my gis objects to 900913, verified that i could
see the rendered points in the geoserver Layer Preview with OpenLayer
and tried to add the WMS layer to my map created with Drupal Openlayer
module.
It apparently works but it fetches a bound box that is wrong, in fact if
i modify manually the request urls (from the browser) i get the correct
data. I need to understand better how this bounded box works, how is it
initially set? i guess that for each png image downloaded there is a
specific BBOX parameter, is this done by the Openlayers library?
I've also explained the issue on the drupal openlayers module but
apparently it was never really tested with WMS 900931 (weird right?) .
The module works well with the same configuration and the 4326
projection (http://drupal.org/node/1884422).
Please let me know if you have any suggestion.
Thanks!!
Alex
Alex,
I think you need to post how the OL map and layer objects are defined or
post a link to your site if it is public.
More than likely you have left off something like: SphericalMercator: true
Here is what I use:
map = new OpenLayers.Map('map', {
maxResolution: 156543.0339/2,
numZoomLevels: 18,
units: 'm',
maxExtent: new OpenLayers.Bounds(-20037508.34,
-20037508.34, 20037508.34, 20037508.34),
sphericalMercator: true,
projection: epsg900913,
displayProjection: epsg4326,
controls:[
new OpenLayers.Control.LayerSwitcher(),
// new OpenLayers.Control.OverviewMap(),
new OpenLayers.Control.Permalink('permalink'),
new OpenLayers.Control.MouseToolbar(),
new OpenLayers.Control.MousePosition(),
new OpenLayers.Control.PanZoomBar(),
new OpenLayers.Control.Scale(),
new OpenLayers.Control.ScaleLine()
]
});
var wms = new OpenLayers.Layer.WMS(
"Peru WMS",
"http://server/cgi-bin/mapserv?";,
{ map: "/u/data/mydata/peru4.map",
format: "image/png",
layers: "Peru4_4326_WMS"
},
{
sphericalMercator: true,
transitionEffect: 'resize',
singleTile: true,
ratio: 1.0
});
wms.addOptions({isBaseLayer: true});
wms.setVisibility(false);
map.addLayer(wms);
-Steve
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