I am in the process of rendering a series of map tiles based on the OS OpenData products using the script (and an updated version that uses all cores on the machine to speed things up).  The different raster products are rendered at different scales and then displayed using LeafletJS and OpenLayers applications as simple demonstrations.

The following command generates the tiles for the zoom levels I need:

python -z '7-9' -e -p raster -r average osvmd.vrt osvmdtiles/

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