This example uses a custom projection (EPSG:27700) to display mapping from the free OpenSpace service from Ordnance Survey.

The OS OpenSpace layer is a WMS and has a tile size which changes with resolution (zoom).

Daily Tile Quota: available= used=

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See the os-openspace.js source to see how this is done using the OpenSpace OL3 class in openspace-ol3.js.

OS, UK, projection