[1] GitHub - mapbox/vector-tile-spec: Mapbox Vector Tile specification, https://github.com/mapbox/vector-tile-spec
[2] Leaflet.VectorGrid API reference, , https://leaflet.github.io/Leaflet.VectorGrid/vectorgrid-api-docs.html
[4] Vector tiles - OpenStreetMap Wiki, , https://wiki.openstreetmap.org/wiki/Vector_tiles