Rename 144 custodian files from XXX placeholders to resolved city codes:
- BR (65): ASA, RBR, MAN, FAZ, MAC, VIT, FOR, GUA, BRE, GOI, SLU, BHO, XAN, CGR, CUI, etc.
- CH (24): ZUR, BER, GEN, BAL, LUC, etc.
- MX (23): MEX, GDL, MTY, PUE, etc.
- CL (9): SCL, VAL, etc.
- CZ (5): PRG, BRN, MSV, etc.
- KR (4): SEL, etc.
- GB (4): LON, etc.
- FR (3): PAR, etc.
- IN (2): DEL, etc.
- PH, JP, EE (1 each)
City codes derived from GeoNames reverse geocoding using institution coordinates.
GHCID format: {COUNTRY}-{REGION}-{CITY}-{TYPE}-{ABBREV}
1e01639c56
