Cityweft’s Spain building dataset combines multiple high-quality building footprint sources with national LiDAR elevation data to produce a highly accurate and consistent LOD1 3D building layer for design and planning workflows.

Building footprints are sourced from OpenStreetMap, Microsoft (Microsoft Building Footprints), and authoritative national data from the Instituto Geográfico Nacional (IGN). These footprints are unified and processed by Cityweft, then paired with IGN LiDAR data to derive reliable building heights.

Data sources

• Building footprints: OpenStreetMap, Microsoft Building Footprints, Instituto Geográfico Nacional, and other trusted open datasets
• Height data: Instituto Geográfico Nacional (IGN) LiDAR

Latest update

• The dataset reflects the latest available inputs, based on IGN LiDAR collected between 2015 and 2021.

Coverage and reliability

• Nationwide building coverage across Spain
• Very high height accuracy, derived directly from measured LiDAR elevation data (not estimated or averaged)
• LiDAR provides elevation samples at 2.5 m spacing
• In rare edge cases, heights may be affected by temporary or interfering objects (e.g. trees, cranes, construction equipment), but these occurrences are uncommon

Cityweft processing approach

This dataset is produced using a technically advanced processing pipeline developed by Cityweft:

• Building footprints from multiple sources are merged, cleaned, and standardized
• Footprint-based or attributed heights are fully overridden using LiDAR measurements