# Canadian Dataset Integration Report

**Date**: 2025-11-19 11:26:41  
**Operation**: Merge Canadian ISIL Registry (TIER_1) with Global Dataset

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## Integration Summary

| Metric | Count |
|--------|-------|
| **Total institutions after merge** | 22,981 |
| **Global institutions (before)** | 13,415 |
| **Canadian institutions (TIER_1)** | 9,566 |
| **Overlapping ISIL codes** | 0 |
| **Canadian institutions added** | 9,566 |
| **Global institutions replaced** | 0 |
| **Global institutions retained** | 13,415 |

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## Data Tier Breakdown

The integration follows data tier hierarchy:

1. **TIER_1_AUTHORITATIVE** (Canadian ISIL Registry)
   - 9,566 institutions
   - Official government registry
   - Takes precedence over conversation-extracted data

2. **TIER_4_INFERRED** (Conversation extraction)
   - 13,415 institutions
   - NLP-extracted from heritage conversations
   - Retained where no TIER_1 data exists

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## Geographic Coverage

### Before Integration
- **Countries**: ~60+ (from conversations)
- **Canadian institutions**: 0

### After Integration
- **Countries**: ~61 (added Canada)
- **Canadian institutions**: 9,566
- **Total institutions**: 22,981

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## Deduplication Details

### ISIL Code Matching

0 overlapping ISIL codes were found and resolved:

- **Strategy**: TIER_1 (Canadian registry) replaces TIER_4 (conversations)
- **Reason**: Government registries are authoritative sources
- **Result**: 0 global records replaced with Canadian TIER_1 data

### New Additions

9,566 Canadian institutions added to global dataset:

- All have ISIL codes (CA-XXXX format)
- 94.3% have geocoded coordinates
- Complete metadata from Library and Archives Canada

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## Quality Assessment

### Data Completeness

| Field | Canadian Coverage |
|-------|-------------------|
| Name | 100% |
| ISIL Code | 100% |
| City | 100% |
| Province | 100% |
| Institution Type | 100% |
| Geocoded (lat/lon) | 94.3% |
| GHCID | 100% |

### Data Sources

**Canadian ISIL Registry** (TIER_1):
- Source: Library and Archives Canada
- URL: https://sigles-symbols.bac-lac.gc.ca
- Extraction date: 2025-11-18
- Records: 9,566 institutions
- Coverage: All 13 provinces/territories

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## Impact on Global Dataset

### Size Increase
- Before: 13,415 institutions
- After: 22,981 institutions
- Growth: +9,566 institutions (+71.3%)

### TIER_1 Coverage
- Canada is now the **largest single-country TIER_1 dataset**
- 9,566 institutions with authoritative metadata
- Surpasses Netherlands (1,351), Belgium (427), Argentina (2,156)

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## Next Steps

### Immediate
- [x] Merge Canadian dataset with global dataset
- [x] Deduplicate by ISIL code
- [x] Export updated global dataset

### Future Enhancements
- [ ] Improve geocoding to 98%+ (Nominatim fallback for 543 small communities)
- [ ] Add Wikidata linking for Canadian institutions
- [ ] Cross-reference with OpenStreetMap for address validation
- [ ] Create GeoJSON export for mapping

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## Files Created

### Input Files
- `data/instances/canada/canadian_heritage_custodians_geocoded.json` (15 MB)
  - 9,566 Canadian institutions
  - TIER_1_AUTHORITATIVE
  - 94.3% geocoded

- `data/instances/all/globalglam-20251111.yaml` (existing)
  - 13,415 global institutions
  - TIER_4_INFERRED (conversation extraction)

### Output Files
- `data/instances/all/globalglam-20251119-canada-integrated.yaml`
  - 22,981 merged institutions
  - Sorted by country, then by name
  - Includes metadata header

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**Integration completed successfully** ✅