# Product supply information

## Product supply format <a href="#id-3.1-product-supply-format" id="id-3.1-product-supply-format"></a>

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

## Product supply mechanism <a href="#id-3.2-product-supply-mechanism" id="id-3.2-product-supply-mechanism"></a>

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](https://osdatahub.os.uk/).