Winchester Signal

Indoor mobile signal fails across the city. Here is what would fix it.

–public sites

–masts

–gap sites

Ofcom's public district figures ·

Pick a network — see its not-spots

Most people are on one network — pick it to see its not-spots: Ofcom's indoor rating per postcode, plus the places its masts don't reach.

Advanced · mast confidence filter

Min. observations / site

sites — mast sites are guessed from crowd phone reports, so one seen only a few times may not exist. This hides sites seen fewer than N times.

Test the assumptions — range & terrain

Assumed mast range 400 m

Drag to test how far each mast reaches — sites outside every ring turn amber.

Terrain line-of-sight beta

Show / hide map layers

Public sites · council, schools, NHS, leisure — from OpenStreetMap

Already in coverage0 In a not-spot — could host a mast0

Masts & coverage

Assumed coverage rings

Where a new mast could go

Public sites outside the chosen network's mast range, widest gap first. Tick one or more to model them as proposed masts.

The data still withheld

Street-level coverage — obtainedFetched postcode by postcode through Ofcom's API for the whole city and shown in this briefing under Ofcom's API terms (attribution shown, refreshed monthly).

Real mast sites: location, height, powerThe operators know; the public database (Sitefinder) stopped in 2012. This map guesses sites from crowd reports.

Measured signal, not predictionsDrive tests and handset data exist inside Ofcom and the operators; none is published for Winchester.

Where service actually failsOperators log complaints and faults by area. Never published.

Add your own sites (GeoJSON)

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

Data sources & small print

Ofcom street-level ratings — Ofcom's Connected Nations API, the data behind its coverage checker, fetched per postcode and refreshed monthly. Used under Ofcom's API terms of use ·
Ofcom district figures — Ofcom Connected Nations open data
Council & public sites — OpenStreetMap (baked snapshot, refreshed live via the Overpass API)
Network masts — OpenCelliD · positions approximate; a mast nearby ≠ good signal
Your uploaded sites — GeoJSON you paste in

OSM tags are a proxy for ownership, not a legal record — verify against the council asset register before quoting a site.

Loading live map data…

O2 · assumed coverage

Map tools

Public site · in mast range

Public site · outside mast range

Network mast (OpenCelliD)

Assumed coverage

Proposed mast coverage