Welcome to the Oxford Density Map

This interactive map visualises point-of-interest density across Oxford's neighbourhoods (LSOAs). By default it displays publicly available amenity data. You can replace this with your own HMO licence dataset by uploading a CSV in the panel at the bottom-left.

• Neighbourhood shading — each LSOA polygon is coloured by density (amenity count or HMO count). Hover for details.
• Blue circle markers — individual amenity locations (default dataset). Visible when no HMO CSV is loaded.
• Blue building footprints — exact building outlines for HMO addresses matched to OpenStreetMap. Appear after uploading an HMO CSV.
• Orange circle markers — HMO addresses that could not be matched to a building footprint, placed at their postcode centroid. Appear after uploading an HMO CSV.

• OSM Map tiles & building footprints — OpenStreetMap contributors, fetched at build time via the Overpass API.
• ONS Neighbourhood boundaries — LSOA polygons from the ONS Open Geography Portal.
• CSV HMO data — uploaded by you and processed entirely in your browser. It is never sent to any server.

• ⓘ Hover over buildings or markers to see metadata (address, licence dates, register ID). The neighbourhood shading overlay can block these tooltips — use the layer control in the top-right to untick it when you want to inspect individual markers.
• ⓘ Some buildings contain multiple HMO entries at the same address (e.g. Flat A and Flat B). These are consolidated into a single footprint — hover to see all sub-units and entry count in the metadata.

All reference data (tiles, boundaries, building footprints) is either served as static files or loaded from OpenStreetMap tile servers. No uploaded data leaves your browser.