Synchronization Statistics

Last Pipeline Completed

2026-08-30 02:07:50

Last ATLAS Downloaded

2026-08-29 04:12:00

Last GTFS Downloaded

2026-08-29 04:12:00

Last Overpass Query

2026-08-30 02:01:41

Matching Stages

Stage	Count	% of Total	Many-to-One	Not Closest	Mean (m)	Median (m)	P95 (m)
Exact (UIC ref)	21,260	33.3%	13,222	5,790	20.61	8.5	77.37
Name matching	444	0.7%	6	162	48.48	14.23	118.7
Route matching (total)	15,601	24.4%	14	3,897	7.13	5.18	20.99
GTFS	15,601	24.4%	14	3,897	7.13	5.18	20.99
Distance (total)	12,001	18.8%	2,491	3,497	-	-	-
Stage 0: Trio side matching	2,456	3.8%	2,456	860	8.56	4.47	23.24
Stage 1: Group proximity (50m)	8,567	13.4%	27	2,198	-	-	-
Stage 1a: UIC ref	8,257	12.9%	24	2,127	7.74	5.17	24.82
Stage 1b: UIC name	41	0.1%	0	7	8.83	6.16	33.41
Stage 1c: Name	269	0.4%	3	64	12.16	8.19	37.87
Stage 1b: Group proximity (150m)	497	0.8%	3	374	-	-	-
Stage 1d: UIC ref (150m)	469	0.7%	1	351	81.7	74.88	136.25
Stage 1e: UIC name (150m)	5	0.0%	0	4	121.32	123.62	149.23
Stage 1f: Name (150m)	23	0.0%	2	19	74.09	60.62	126.95
Stage 2: Local ref	73	0.1%	4	25	16.21	12.89	39.9
Stage 3a: Single candidate	360	0.6%	1	40	-	-	-
3a pass 1	325	0.5%	1	34	12.7	8.63	44.18
3a pass 2	35	0.1%	0	6	11.55	5.53	44.52
Stage 3b: Ratio test	48	0.1%	0	0	2.86	2.42	6.62
Post-processing: ATLAS Duplicate propagation	333	0.5%	333	119	23.92	8.62	101.53
Post-processing: OSM stop partner propagation	14,186	22.2%	1,780	8,337	8.82	5.39	26.25

Distance Quality

13.15m

Mean Distance

6.03m

Median Distance

46.1m

95th Percentile

Cross-Predicate Consistency

If we had matched every pair to its nearest OSM node instead:

65.8%

Consistent with Nearest

42,023

Same as Nearest

21,802

Would Differ

Many-to-One Analysis

OSM platform/stop_position groups are counted as one OSM stop in this section.

335

ATLAS platforms matched to multiple OSM stops

Max: 5 OSM stops per ATLAS

7,324

OSM stops matched to multiple ATLAS platforms

Max: 10 ATLAS per OSM stop

Distribution: 1 ATLAS to N OSM stops

Ratio key: 1A:2O = one ATLAS platform matched to two OSM stops.

Distribution: N ATLAS to 1 OSM stop

Ratio key: 2A:1O = two ATLAS platforms matched to one OSM stop.

OSM Stop Inventory

66,243

OSM Nodes

49,470

OSM Stops

1,716

OSM Stations

3,748

Nodes with operator:wikidata

27,566

Nodes with network:wikidata

Non-node OSM Stops (Ways)

341

Total Way Stops

165

Matched

176

Unmatched

48.4%

Match Rate

OSM Groups (Platform / Stop Position Pairs)

15,544

Total Groups

15,415

Both Matched

129

Neither Matched

Groups by Type

Group Type	Count
osm_trio	1,229
osm_pair_uic_equal_15m	10,364
osm_pair_uic	2,936
osm_pair_name	655
osm_pair_name_equal_15m	30
osm_pair_tram	318
osm_pair_tram_equal_15m	12

Unmatched Analysis

Unmatched ATLAS (5,722)

No OSM within 50m	2,981
Has nearby OSM	2,741

Unmatched OSM (9,225)

No ATLAS within 50m	3,395
Has nearby ATLAS	5,830

Attributes Analysis

Has Attributes	Count
UIC & Local Ref & Routes	162
UIC & Local Ref	105
UIC & Routes	2,190
Local Ref & Routes	87
UIC only	2,922
Local Ref only	85
Routes only	1,006
None	2,668

ATLAS Duplicates

Total duplicate SLOIDs	644
Matched duplicates	643
Unmatched duplicates	48

Problem Detection Statistics

39,843

Clean Entries (No Problems)

50.6% of total 78,772

38,929

Entries with Problems

49.4% of total 78,772

4,504

Multiple Problems Output

Entries with >1 problem types

P1 Critical 6,652

Problem Type	Count
Distance — Too far from OSM node	1,217
Unmatched — Isolated ATLAS / OSM node	4,505
Attributes — Missing or mismatched data	930

P2 Significant 16,102

Problem Type	Count
Distance — Too far from OSM node	4,551
Unmatched — Isolated ATLAS / OSM node	7,480
Attributes — Missing or mismatched data	334
Duplicates — OSM or ATLAS side collisions	343

P3 Minor 21,003

Problem Type	Count
Distance — Too far from OSM node	5,621
Unmatched — Isolated ATLAS / OSM node	2,962
Attributes — Missing or mismatched data	10,959
Duplicates — OSM or ATLAS side collisions	1,461

Route Coverage

ATLAS stops matched by GTFS routes	44,490 / 54,981	80.9%
OSM stops with routes coverage	35,266	71.3%

ATLAS coverage here is stop-side route coverage. The GTFS mapping block below reports the separate GTFS stop_id to ATLAS sloid mapping coverage.

Route-Route Matching

Metric	Count
Route-route links (ATLAS ↔ OSM)	2,058
Linked ATLAS route IDs	2,058
Linked OSM route IDs	2,058

Coverage	Count	Percent
ATLAS route IDs with link	2,058 / 4,037	51.0%
OSM route IDs with link	2,058 / 2,874	71.6%
ATLAS itineraries with link	1,063 / 14,450	7.4%
OSM itineraries with link	1,063 / 8,206	13.0%
ATLAS route directions (total)	7,616	-
OSM route directions (total)	4,920	-

Match Method Breakdown

Method	Count	% of Total
Exact GTFS route ID	1,662	80.8%
Normalized GTFS route ID	396	19.2%
OSM display route ID matches ATLAS route ID	0	0.0%

This section reports route-route links from import DB route tables, not stop-level predicate matches.

Route Pipeline Shape

Metric	Mean	Median
ATLAS itineraries per family	3.58	3.0
OSM itineraries per family	2.86	2.0
GTFS trips collapsed into one ATLAS itinerary	139.08	17.0
Matched family itinerary gap (ATLAS - OSM)	1.01	0.0

Matched Family Comparison	Count
Matched families where ATLAS has more itineraries	908
Matched families with equal itinerary counts	803
Matched families where OSM has more itineraries	347

OSM Route Family Grouping Method

How OSM route relations are grouped into line families. Priority order: route_master → GTFS route ID → (route, ref, operator, network) → per-relation fallback.

Grouping Method	Families	% of Families	Relations
route_master (explicit OSM grouping)	2,672	93.0%	7,959
Normalized GTFS route ID	5	0.2%	7
Synthetic key (route, ref, operator, network)	197	6.9%	240
Per-relation fallback (no grouping key)	0	0.0%	0
Total	2,874	100%	8,206

GTFS stop_id → ATLAS sloid Mapping

82,829

Total GTFS stop_ids

50,482

Matched stop_ids

32,347

Unmatched stop_ids

60.95%

GTFS stop_id Coverage

54,981

Total ATLAS stops

44,490

ATLAS stops matched

80.9%

ATLAS stop Coverage

Matching Paths

① Direct SLOID match

Matches where original_stop_id directly contains a valid ATLAS SLOID.

43,091

Assignments

② Strict matching

Matches on (UIC number, local ref) = (number, designation) in ATLAS.

17

Assignments

③ Coordinate proximity

For remaining: ATLAS stops with the same UIC number within 0.5m (must be unambiguous).

945

Assignments

④ Unique-number fallback

For remaining: if a UIC number maps to exactly one ATLAS row, use that sloid.

6,429

Assignments

50,482

Total assignments (all paths combined)

Cardinality

GTFS stop_id side

50,482

1 → 1

0

1 → many

ATLAS sloid side

39,297

1 → 1

5,193

many → 1

Unmatched Reasons

Reason	Count
No ATLAS candidate for this UIC number	694
Non-unique ATLAS number (strict miss, fallback not applicable)	31,653
Coordinate proximity conflict (multiple candidates within radius)	279

Generating Report

Stops matching

Matching Stages

Distance Quality

Cross-Predicate Consistency

Many-to-One Analysis

Distribution: 1 ATLAS to N OSM stops

Distribution: N ATLAS to 1 OSM stop

OSM Stops

OSM Stop Inventory

Non-node OSM Stops (Ways)

OSM Groups (Platform / Stop Position Pairs)

Groups by Type

Unmatched

Unmatched Analysis

Unmatched ATLAS (5,722)

Unmatched OSM (9,225)

ATLAS

ATLAS Duplicates

Problems

Problem Detection Statistics

Routes

Route Coverage

Route-Route Matching

Match Method Breakdown

Route Pipeline Shape

OSM Route Family Grouping Method

GTFS stop_id → ATLAS sloid Mapping

Matching Paths

① Direct SLOID match

② Strict matching

③ Coordinate proximity

④ Unique-number fallback

Cardinality

GTFS stop_id side

ATLAS sloid side

Unmatched Reasons