Winchester Coverage Gap Finder

Council & public assets · existing phone masts · candidate host sites

–assets

–masts

–gap sites

Map layers

Council & public assets0 Assets in a coverage gap0 Existing phone masts (OSM)0 Indicative coverage rings

Assumed mast range

400 m

Drag to test how far each mast reaches. Assets outside every ring turn amber and rank below as candidate host sites. Indicative only — real reach depends on frequency, power, height and terrain.

Terrain line-of-sight beta

Candidate host sites · widest gaps first

Tick sites — or click a gap marker on the map — to model them as proposed masts and see how much of the gap they'd close together.

Add your own assets

Points are added as your assets and included in gap detection.

Data sources

Council & public assets — OpenStreetMap via the Overpass API
Existing phone masts — OpenStreetMap (crowd-sourced, incomplete)
Network masts (EE/O2/Voda/Three) — OpenCelliD · positions approximate; a mast here ≠ good signal
Ofcom official coverage — Ofcom Connected Nations open data (Jan 2023, district-level)
Your uploaded assets — GeoJSON you paste in

OSM tags are a proxy for ownership, not a legal record — verify against the council asset register & Ofcom for a formal case.

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O2 coverage