Calculate Tiles X,Y, Z for current view or extent in OpenLayers

المشرف العام

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Im using OpenLayers with the openstreetmap tile server.

var urlTemplate = "http://c.tile.openstreetmap.org/{z}/{x}/{y}.png"I would like to download tiles for the current view or an extent. So that I can view them later offline.

Therefore Im trying to calculate the z, x,y for the tiles

The coordinate Z should be avaible from the maps zoom

But how can I find the different x,y Coordinates for the view/extent? Is there a OpenLayers funtion for that?



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