Product supply

Product supply format

Building Height Attribute data is supplied in comma-separated values (CSV) file format. Files will not be compressed.

Product supply mechanism

OS MasterMap Topography Layer – Building Height Attribute is supplied as an online download. You can download data in CSV format from the OS Data Hub.

The product is currently still available for customers to request through OS Orders.

Building Height Attribute is supplied in 5 km² geographic chunks. Each 5 km² chunk will contain Building Height Attribute values for any building polygon that intersects that area. As such, any Building Height Attribute values that fall across tile boundaries in contiguous tiles will be duplicated.

Tiles are supplied with all available data contained within them. Not all 5 km² tiles will have complete coverage.

File naming in the product

The CSV files are named as the 5km2 chunks they correspond to, for example:

• TQ2060 for TQ26SW

• TQ2065 for TQ26NW

• TQ2560 for TQ26SE

• TQ2565 for TQ26NE