Synchronization Statistics

Last Pipeline Completed

2026-08-24 00:51:34

Last ATLAS Downloaded

2026-08-23 04:07:00

Last GTFS Downloaded

2026-08-23 04:07:00

Last Overpass Query

2026-08-24 00:45:08

Matching Stages

Stage	Count	% of Total	Many-to-One	Not Closest	Mean (m)	Median (m)	P95 (m)
Exact (UIC ref)	21,241	33.3%	13,212	5,794	20.62	8.51	77.37
Name matching	444	0.7%	6	162	48.48	14.23	118.7
Route matching (total)	15,356	24.1%	13	3,816	7.13	5.19	20.79
GTFS	15,356	24.1%	13	3,816	7.13	5.19	20.79
Distance (total)	12,260	19.2%	2,493	3,576	-	-	-
Stage 0: Trio side matching	2,458	3.9%	2,458	858	8.55	4.46	23.24
Stage 1: Group proximity (50m)	8,823	13.8%	27	2,280	-	-	-
Stage 1a: UIC ref	8,513	13.3%	24	2,209	7.75	5.15	25.12
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)	496	0.8%	3	373	-	-	-
Stage 1d: UIC ref (150m)	468	0.7%	1	350	81.82	75.11	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	362	0.6%	1	40	-	-	-
3a pass 1	327	0.5%	1	34	12.68	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	331	0.5%	331	118	23.88	8.62	101.53
Post-processing: OSM stop partner propagation	14,182	22.2%	1,779	8,330	8.81	5.38	26.23

Distance Quality

13.14m

Mean Distance

6.04m

Median Distance

46.08m

95th Percentile

Cross-Predicate Consistency

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

65.8%

Consistent with Nearest

42,018

Same as Nearest

21,796

Would Differ

Many-to-One Analysis

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

334

ATLAS platforms matched to multiple OSM stops

Max: 5 OSM stops per ATLAS

7,321

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

66,227

OSM Nodes

49,456

OSM Stops

1,716

OSM Stations

3,743

Nodes with operator:wikidata

27,512

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)

15,541

Total Groups

15,412

Both Matched

129

Neither Matched

Groups by Type

Group Type	Count
osm_trio	1,230
osm_pair_uic_equal_15m	10,362
osm_pair_uic	2,936
osm_pair_name	654
osm_pair_name_equal_15m	30
osm_pair_tram	317
osm_pair_tram_equal_15m	12

Unmatched Analysis

Unmatched ATLAS (5,726)

No OSM within 50m	2,980
Has nearby OSM	2,746

Unmatched OSM (9,212)

No ATLAS within 50m	3,392
Has nearby ATLAS	5,820

Attributes Analysis

Has Attributes	Count
UIC & Local Ref & Routes	161
UIC & Local Ref	102
UIC & Routes	2,193
Local Ref & Routes	87
UIC only	2,923
Local Ref only	85
Routes only	1,002
None	2,659

ATLAS Duplicates

Total duplicate SLOIDs	640
Matched duplicates	638
Unmatched duplicates	48

Problem Detection Statistics

39,837

Clean Entries (No Problems)

50.6% of total 78,752

38,915

Entries with Problems

49.4% of total 78,752

4,491

Multiple Problems Output

Entries with >1 problem types

P1 Critical 6,653

Problem Type	Count
Distance — Too far from OSM node	1,216
Unmatched — Isolated ATLAS / OSM node	4,510
Attributes — Missing or mismatched data	927

P2 Significant 16,084

Problem Type	Count
Distance — Too far from OSM node	4,549
Unmatched — Isolated ATLAS / OSM node	7,473
Attributes — Missing or mismatched data	335
Duplicates — OSM or ATLAS side collisions	340

P3 Minor 20,993

Problem Type	Count
Distance — Too far from OSM node	5,626
Unmatched — Isolated ATLAS / OSM node	2,955
Attributes — Missing or mismatched data	10,959
Duplicates — OSM or ATLAS side collisions	1,453

Route Coverage

ATLAS stops matched by GTFS routes	44,004 / 54,979	80.0%
OSM stops with routes coverage	35,272	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 / 4,032	51.0%
OSM route IDs with link	2,058 / 2,874	71.6%
ATLAS itineraries with link	1,059 / 14,394	7.4%
OSM itineraries with link	1,059 / 8,206	12.9%
ATLAS route directions (total)	7,608	-
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	3.57	3.0
OSM itineraries per family	2.86	2.0
GTFS trips collapsed into one ATLAS itinerary	136.09	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	802
Matched families where OSM has more itineraries	348

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

82,629

Total GTFS stop_ids

50,006

Matched stop_ids

32,623

Unmatched stop_ids

60.52%

GTFS stop_id Coverage

54,979

Total ATLAS stops

44,004

ATLAS stops matched

80.0%

ATLAS stop Coverage

Matching Paths

① Direct SLOID match

Matches where original_stop_id directly contains a valid ATLAS SLOID.

42,564

Assignments

② Strict matching

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

23

Assignments

③ Coordinate proximity

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

925

Assignments

④ Unique-number fallback

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

6,494

Assignments

50,006

Total assignments (all paths combined)

Cardinality

GTFS stop_id side

50,006

1 → 1

0

1 → many

ATLAS sloid side

38,808

1 → 1

5,196

many → 1

Unmatched Reasons

Reason	Count
No ATLAS candidate for this UIC number	690
Non-unique ATLAS number (strict miss, fallback not applicable)	31,933
Coordinate proximity conflict (multiple candidates within radius)	303

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 (5,726)

Unmatched OSM (9,212)

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