Mapping

Tile name derivation
Mathematical relationships which can be used to derive tile names (ZXY and WMTS) from coordinates at a particular zoom level and vice-versa.

OS Transform
A set of JavaScript helper functions for transforming between the OSGB36/British National Grid (EPSG:27700) and WGS84 (EPSG:4326) coordinate systems; as well as providing support for OS Grid Reference conversions.

osbng: British National Grid References in Python
Python package supporting geospatial grid indexing and interaction with Ordnance Survey's British National Grid index system.
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