GML is the OGC XML standard for geodata exchange in government, GeoJSON is a lightweight JSON format for the web. GML is more formal, GeoJSON is simpler and more popular.
| Criteria | GML | GeoJSON |
|---|---|---|
| Government/INSPIRE | ✓ | ✗ |
| Web development | ✗ | ✓ |
| Data schemas (XSD) | ✓ | ✗ |
| File size | Large (XML) | Medium (JSON) |
| Easy to parse | ✗ | ✓ |
For INSPIRE, cadastre, government data exchange, OGC services.
For web maps, APIs, mobile apps, rapid development.