Skip to content

OS Terrain 50 support

OS Terrain 50 is a digital terrain model of the landscape, available as a gridded digital terrain model and in 10m contours with spot heights.

Getting started

OS Terrain is the name given to Ordnance Survey’s new range of height products.

User guide and technical specification (PDF)

This user guide is designed to provide an overview of OS Terrain 50 and it gives guidelines and advice on how a customer might derive the maximum benefit from the product.

OS Terrain 50 FAQs


Key FeaturesWhat this product offers
FormatsGrid points (DTM grid); Vector points and lines (Contours)
Data structureGML 3.2 and ASCII (DTM grid); GML 3.2 and Esri shapefile (Contours)
ResolutionPost spacing of 50m (DTM grid); Vertical interval of 10m (Contours)
Tile size10km x 10km
Scale1:50 000
Supply Download
Update frequencyOnce a year, in July
CoverageGreat Britain