The bit that I am missing is the exact projection specification I need to get
WGS84 data onto a Google layer.
I think these are all the relevant bits of code
*************
var map = new OpenLayers.Map('map');
var gphy = new OpenLayers.Layer.Google(
"Google Physical",
{type: G_PHYSICAL_MAP}
);
map.addLayer(gphy);
*************
othermarkers = new OpenLayers.Layer.Vector("Other sites",{strategies: [new
OpenLayers.Strategy.Cluster()],
projection : new OpenLayers.Projection("EPSG:4326"),
styleMap: myStyleMap } );
map.addLayer(othermarkers);
********************
(this is in a loop)
point = new OpenLayers.Geometry.Point(siteInfo.long, siteInfo.lat);
spot = new OpenLayers.Feature.Vector(point,siteInfo);
featureGroup.push(spot);
******************
othermarkers.addFeatures(featureGroup);
****************
I've tried setting the Vector layer to 900913 and without any projection but I
can't see any difference, the features still get further away from their
correct spots the further down the screen I move them. If I move the map up
they get closer to where they should be.
:-?
~Craig
>>> "Jan H. van der Ven" 03/20/09 9:05 AM >>>
Dear Craig,
I have started a projection doc page here:
http://trac.openlayers.org/wiki/Documentation/Dev/proj4js.
If that does not help, please tell me what is missing.
Kind regards,
Jan
Craig Stanton schreef:
> Hi All,
> I've sorted the clustering strategy that Ivan mentioned a few days ago
> but have come upon another problem I'd appreciate some advice on. My data is
> stored as WGS84 lat/longs and I want to use Google Terrain as the base layer,
> but the points drift off their locations as they get closer to the bottom of
> the map window. I know the problem is in the projections I'm using but I
> can't figure out the right combination of 900913, 4326, WGS84 etc etc. Could
> someone please explain what I should do to the vector layer on which my
> points are plotted and to the Google layer I am using as my base.
>
> Cheers,
> Craig
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> Research Ltd.
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