Hello all,
A newbie to the list and OpenLayers... I've been experimenting with OL and a tile set of my company's own global data, rendered with Mapnik. I've based my experiments on the Spherical Mercator example (http://www.openlayers.org/dev/examples/spherical-mercator.html) and with just a few changes to the call to OSM, I've got my own tiles loading beautifully. They align with Google, VE, etc. I hit a problem when placing markers on a map. On placing a marker at a known coordinate (in Mercator), there is an offset of about 20km to the north. I'm pretty certain my coordinates are correct. E.g. Dublin (Ireland) centre at -696564,7012127. So, a few questions: - Any idea why my markers are offset? I've tinkered with the { projection } and { displayProjection } options but with no joy. - What determines the coordinate system I should be using when creating markers? - ... and can I override this to LL(WGS-84) which would be my preferred coordinate format. Regards, Warren
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