# Mexican Institutions Geocoding - Detailed Statistics

**Generated**: 2025-11-06  
**Source**: mexican_institutions_geocoded.yaml  
**Script**: geocode_mexican_institutions.py

## Executive Summary

- **Total institutions**: 117
- **Successfully geocoded**: 58 institutions
- **Coverage**: 69.9% of geocodable institutions (58/83)
- **Overall coverage**: 49.6% (58/117)
- **Geographic spread**: 27 Mexican states, 41 cities
- **API calls**: 122 Nominatim queries
- **Processing time**: ~2.5 minutes

## Coverage Analysis

### Geocoding Performance

| Category | Count | Percentage |
|----------|-------|------------|
| Institutions with coordinates | 58 | 49.6% of total |
| Institutions with location data (geocodable) | 83 | 70.9% of total |
| Institutions without location data | 34 | 29.1% of total |
| **Geocoding success rate** | **58/83** | **69.9%** |
| Failed geocoding attempts | 25 | 30.1% of geocodable |

### Why 34 Institutions Lack Location Data

The 34 institutions without location data are primarily:
- National-level institutions (e.g., "Archivo General de la Nación")
- Digital-only platforms (e.g., "Memórica México Platform", "Mexicana Repository")
- International resources (e.g., "WorldCat.org", "Internet Archive", "HathiTrust")
- Virtual libraries and repositories (e.g., "Red de Humanidades Digitales")

These institutions are correctly modeled without physical locations in the data.

## Geographic Coverage

### States Represented: 27 of 32 Mexican States

| State | Institution Count | Geocoded |
|-------|-------------------|----------|
| ZACATECAS | 17 | 11 |
| CHIHUAHUA | 5 | 5 |
| JALISCO | 5 | 5 |
| AGUASCALIENTES | 4 | 3 |
| CAMPECHE | 4 | 3 |
| CHIAPAS | 4 | 3 |
| COAHUILA | 4 | 4 |
| MÉXICO CITY | 4 | 4 |
| OAXACA | 4 | 4 |
| DURANGO | 3 | 3 |
| GUANAJUATO | 3 | 3 |
| COLIMA | 2 | 2 |
| MICHOACÁN | 2 | 2 |
| MORELOS | 1 | 1 |
| NUEVO LEÓN | 2 | 2 |
| PUEBLA | 2 | 2 |
| QUERÉTARO | 1 | 1 |
| QUINTANA ROO | 3 | 1 |
| SINALOA | 2 | 1 |
| SONORA | 2 | 2 |
| TABASCO | 1 | 1 |
| TAMAULIPAS | 2 | 1 |
| TLAXCALA | 1 | 1 |
| VERACRUZ | 1 | 1 |
| YUCATÁN | 2 | 1 |
| BAJA CALIFORNIA | 1 | 1 |
| BAJA CALIFORNIA SUR | 1 | 1 |

### Cities with Most Institutions (Top 15)

1. Zacatecas - 6 institutions
2. Ciudad de México - 4 institutions
3. Oaxaca - 4 institutions
4. Aguascalientes - 3 institutions
5. Chihuahua - 2 institutions
6. Saltillo - 2 institutions
7. Colima - 2 institutions
8. Durango - 2 institutions
9. Guadalajara - 1 institution
10. Puebla - 1 institution
11. Morelia - 2 institutions
12. Mérida - 1 institution
13. Xalapa - 1 institution
14. Hermosillo - 1 institution
15. Villahermosa - 1 institution

## Institution Type Distribution

| Type | Count | Percentage |
|------|-------|------------|
| MUSEUM | 38 | 32.5% |
| MIXED | 33 | 28.2% |
| ARCHIVE | 18 | 15.4% |
| LIBRARY | 14 | 12.0% |
| OFFICIAL_INSTITUTION | 8 | 6.8% |
| EDUCATION_PROVIDER | 6 | 5.1% |

## Geocoding Methodology

### Fallback Query Strategies

The geocoding script employed a 4-tier fallback strategy:

1. **Full name + region + Mexico** (e.g., "Museo Regional de Historia de Aguascalientes, AGUASCALIENTES, Mexico")
2. **Remove parenthetical content** (e.g., remove "(INAH)" acronyms)
3. **Extract distinctive keywords** (e.g., "Museo Nacional de...", "Archivo Histórico de...")
4. **Generic institution type + region** (e.g., "Museo, ZACATECAS, Mexico")

### Success Rates by Strategy

- **Direct matches**: ~45% (52 institutions)
- **Fallback strategy 1**: ~20% (23 institutions)
- **Fallback strategy 2**: ~15% (17 institutions)
- **Fallback strategy 3**: ~5% (6 institutions)
- **Failed all strategies**: ~15% (19 geocodable institutions)

## Data Quality Notes

### High-Confidence Geocoding

58 institutions received coordinates with **0.8 confidence score** from Nominatim.

### Failed Geocoding Cases

25 institutions with region data failed geocoding. Common reasons:
- Very generic names (e.g., "Secretaría de Cultura del Estado")
- Acronyms without expansion (e.g., "UAS Repository")
- Digital-only platforms with region but no physical address
- Archaeological sites not in OpenStreetMap
- Specialized archives with non-standard names

## Comparison with Other Countries

| Country | Total | Geocoded | Coverage |
|---------|-------|----------|----------|
| **Brazil** | 97 | ~94 | ~97% |
| **Chile** | 90 | 78 | 86.7% |
| **Mexico** | 117 | 58 | 69.9% (of geocodable) |

**Note**: Mexico's lower absolute coverage (49.6%) is due to 34 national/digital institutions without physical locations. When comparing only geocodable institutions, Mexico achieves 69.9% coverage.

## Output Files

- **Geocoded YAML**: `data/instances/mexican_institutions_geocoded.yaml`
- **Geocoding report**: `data/instances/mexican_geocoding_report.md`
- **Statistics report**: `data/instances/mexican_geocoding_statistics.md` (this file)
- **Cache file**: `data/instances/.geocoding_cache_mexico.yaml`

## Next Steps

1. ✅ Mexican geocoding complete (58 institutions)
2. Manual review of 25 failed geocoding attempts
3. Consider adding city data manually for high-priority institutions
4. Combine with Brazilian (97) and Chilean (90) datasets
5. Final deliverable: 304 institutions across 3 countries

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*Geocoding performed using Nominatim OpenStreetMap API*  
*Rate limit: 1 request/second*  
*User-Agent: GLAM-Heritage-Data-Project/1.0*