Getting started
OS Terrain is the name given to Ordnance Survey’s range of height products. These are three-dimensional models of the bare earth surface known as digital terrain models (DTMs).
User guide (PDF)
OS Terrain 5 is published as both grid and contours, each in a variety of formats. Both data types are created from the same source data and are supplied as 5 km by 5 km tiles.
Technical specification (PDF)
The technical specification is included within the user guide for this product.
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Specifications
Key Features | What this product offers |
---|---|
Format | GML 3.2 and ASCII grid for DTM, GML 3.2 and Esri shapefile for contours. |
Resolution | Grid: 5m post spacing. Contours: vertical interval of 5m. |
Tile size | 5km x 5km |
Scale | 1:10 000 |
Supply | Download (annual contract) |
Update frequency | Quarterly (January, April, July and October) |
Coverage | Great Britain |