This page will time out soon

You have been inactive for a while.

For security, we'll sign you out in 2 minutes

Precisely and Accurately

Published: 08/05/2024

We confirmed that all LA's are delivering Eastings and Northings to the correct precision (1mx1m)

We concluded that the best point to measure a bus stop was where someone needs to stand to catch a bus - focus on the passenger experience.

Ordnance Survey have a page on how to do the conversion from Eastings/Northings to Latitude/Longitude (OSGB36 to WGS84)  calculation: https://www.ordnancesurvey.co.uk/business-government/tools-support/os-net/coordinates

We suggest this should be the only method used

The previous NaPTAN did do a centrally managed conversion, this caused issues by overwriting data provided by Local Transport Authorities, and in some cases not performing the conversion to the right precision.

We are working with LA's who are providing converted Lat/Long coordinates to ensure the methods they are using are giving results which are accurate.

We recommend Data Consumers of NaPTAN data do their conversions using the Ordnance Survey methodology