UCID Academic Dataset: 1 Million Urban Context Identifier Records

The UCID Academic Dataset contains 1,000,000 Urban Context Identifier (UCID) records covering 403 cities across 21 countries. This dataset is designed for reproducible academic research on urban analytics, spatial indexing, and context-aware location systems. Dataset Characteristics:- Total Records: 1,000,000- Cities: 403- Countries: 21- Seed: 42 (reproducible) Context Distribution:- 15MIN (15-Minute City): 350,288 records (35.0%)- TRANSIT (Transit Accessibility): 300,431 records (30.0%)- WALK (Walkability): 249,491 records (24.9%)- NONE (No Context): 99,790 records (10.0%) Grade Distribution:- A (Excellent, 0.80-1.00): 120,474 records (12.0%)- B (Good, 0.60-0.80): 280,841 records (28.1%)- C (Moderate, 0.40-0.60): 379,008 records (37.9%)- D (Limited, 0.20-0.40): 149,774 records (15.0%)- F (Poor, 0.00-0.20): 69,903 records (7.0%) Geographic Coverage:- Turkey (TR): 309,893 records (31.0%)- Germany (DE): 143,493 records (14.3%)- United States (US): 97,292 records (9.7%)- Australia (AU): 90,867 records (9.1%)- United Kingdom (GB): 60,509 records (6.1%)- France (FR): 57,988 records (5.8%)- Netherlands (NL): 34,898 records (3.5%)- Other countries: Various Files Included:1. ucid_academic_1m.parquet (45.3 MB) - Compressed Parquet format for analytics2. ucid_academic_1m.jsonl (334.2 MB) - JSON Lines format, full dataset3. ucid_academic_sample.json (4.4 MB) - Sample of 10,000 records4. ucid_academic_statistics.json (10 KB) - Dataset statistics and metadata Each UCID record contains:- UCID string in canonical format- City code and name- Geographic coordinates (WGS84)- H3 hexagonal index (resolution 9)- Timestamp (ISO week format)- Context algorithm- Grade (A-F)- Confidence score (0.0-1.0) This dataset supports research in urban planning, spatial analysis, transit optimization, walkability studies, and 15-minute city evaluation.