[BUG] Zoom level difference with MVT Layer about openlayers HOT 5 OPEN

This is expected, because the zoom levels are derived from the world width fitting a single tile. For MVT, the default is 512 pixels, for WMTS/XYZ 256. So what's zoom 0 on a MVT standard source is zoom 1 on a WMTS/XYZ standard source.

from openlayers.

Thank you for your answer. I'm trying to find some doc specifying the size of mvt tile. Is that a norm, is there a way to know which size is the MVT source ?
Thank you

from openlayers.

Yes there is - for the source you linked, the metadata is here: https://data.geopf.fr/tms/1.0.0/PLAN.IGN/:

<TileFormat width="256" height="256" mime-type="application/x-protobuf" extension="pbf"/>

And as you an see, the advertised tile size is 256x256px. So you need to configure the VectorTile source with {tileSize: 256}, because the default is 512.

from openlayers.

Thank you, it seems that it was the olms lib (not updated) which was changing the size of the tile from 256 to 512 when applying the style. I'll try with a newer version.
Thanks !

from openlayers.

You have to set the tileSize to 256 manually, because 512 is the default and ol-mapbox-style does not read TMS metadata.

from openlayers.