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Further reading

Source papers

Two papers describe the heat-hazard modelling approach:

ReferenceDescribes
De Ridder et al. (2015), Urban Climate 12, 41-58The UrbClim urban boundary-layer model
Souverijns et al. (2023)The high-resolution heat-exposure approach used by HiREx

CityCAT reference outstanding

The handbook notes that a CityCAT-specific technical reference should be added separately once confirmed. The model itself is attributed in the text to Glenis, Kutija and Kilsby (2018); the full citation will be added here when it is supplied.

Supporting geospatial datasets

The hazard models draw on five geospatial sources between them.

DatasetUsed for
Ordnance Survey MasterMapBuilding footprints, greenspace, water bodies and topography
OS Building Height Attributes (BHA)The height values joined to building footprints, giving the three-dimensional geometry HiREx needs
Bluesky National Tree MapIndividual tree crown polygons with height statistics
OpenStreetMap land-use dataVegetated land-use classes, and the exclusion list defining sealed surfaces
Sentinel-2 L2A imagery (Copernicus Data Space Ecosystem)The NDVI raster used to split green areas into low vegetation and bare ground

CityCAT additionally uses OS Terrain 5, accessed via EDINA Digimap, for its 5 m Digital Terrain Model.

Where these are applied

Each dataset is documented in context alongside the model that consumes it. See CityCAT for the flood inputs, and UrbClim for the surface and geometry datasets shared with HiREx, including the three-step construction of the composite Green Areas layer.