In March 2014 Ordnance Survey (OS) published an alpha release of the much anticipated Building Height Attribute (BHA) dataset, which is an enhancement to OS MasterMap Topography Layer. You can read all about it in their blog post.
The first alpha release of BHA included buildings covering approximately 8,000km2 of the country. Subsequent releases have increased the coverage of the dataset which covers major towns and cities in Great Britain. OS publish an interactive map which shows the extents of the areas covered by the alpha release, so you can check if your area of interest is included.
A note of caution, this is an alpha release of the data and OS do not guarantee that BHA is error free or accurate. Additionally the dataset is not subject to update and maintenance. However in time OS intend to include BHA in OS MasterMap Topography Layer so in future it will be supplied and maintained as a part of the Topography Layer.
A number of attributes are provided for each building as shown in the image:
Using these three values two additional relative heights are calculated:
Note: BHA data is not currently available for the whole country, you should consult the interactive map published by the OS to see if data exists for your area of interest.
OS publish the data as a single CSV file containing over 20 million records. This is a very large dataset and can cause data management problems in a desktop environment so EDINA have split the dataset up using the OS 5km grid allowing you to download the data in tiles for your study area. The data is available in CSV, KML and File Geodatabase formats. To use the data in GIS or CAD packages you should download the data in File Geodatabase or CSV format; KML is used to visualise the data in Google Earth.
The ‘Show Grid/Overlay’ menu on the right hand side in the Data Download application displays the OS 5km grid. This will draw a grid with each square containing the OS 5km tile reference, as shown in the image.
The following information is available directly from Ordnance Survey:
Links to instructions on using BHA in common GIS/CAD packages are included below:
Not found what you are looking for? Please ask a question or give feedback by emailing (digimap@ed.ac.uk) or chatting with the Digimap team.
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