OSM coverage gaps over time

How many City of Toronto parks are still missing from OpenStreetMap, mapped under a different name, or mapped as an unnamed area — one point per weekly comparison, so a mapper can see the worklist shrink.

21 comparisons since 2026-06-01 · last 2026-10-24 · current gaps · data (JSONL)

Points in the shaded span are reconstructed after the fact from OSM's own history (an Overpass attic query for that date, compared against today's City polygons); the rest were observed by the weekly build. Counts follow the City's Green Spaces dataset, so they move when the City adds or reclassifies parks, not only when someone maps one.

Every comparison

Date	Missing	Mismatch	Unnamed	TRCA	City polygons	OSM areas	Source
2026-10-12	164	175	146	92	1,756	6,838	live
2026-10-05	170	175	147	92	1,756	6,816	live
2026-09-30	170	180	147	92	1,756	6,815	live
2026-09-28	168	182	160	92	1,754	6,811	reconstructed
2026-09-21	185	185	160	92	1,754	6,774	reconstructed
2026-09-14	187	186	161	92	1,754	6,765	reconstructed
2026-09-07	188	187	161	92	1,754	6,783	reconstructed
2026-08-31	205	186	173	92	1,754	6,762	reconstructed
2026-08-24	206	186	174	92	1,754	6,758	reconstructed
2026-08-17	207	186	175	92	1,754	6,758	reconstructed
2026-08-10	209	186	175	92	1,754	6,754	reconstructed
2026-08-03	210	185	176	92	1,754	6,749	reconstructed
2026-07-27	210	185	177	92	1,754	6,742	reconstructed
2026-07-20	210	185	177	92	1,754	6,709	reconstructed
2026-07-13	210	185	177	92	1,754	6,684	reconstructed
2026-07-06	210	185	177	92	1,754	6,684	reconstructed
2026-06-29	210	185	177	92	1,754	6,661	reconstructed
2026-06-22	210	185	177	92	1,754	6,651	reconstructed
2026-06-15	210	185	177	92	1,754	6,652	reconstructed
2026-06-08	210	184	179	92	1,754	6,651	reconstructed
2026-06-01	212	184	181	92	1,754	6,644	reconstructed