{
  "type": "gps_coordinate",
  "source": "test_dataset",
  "city": "Austin, TX",
  "data": {
    "latitude": 30.25,
    "longitude": -97.75,
    "accuracy": 9.0,
    "altitude": 20.0,
    "timestamp": "2026-01-14T04:10:25.564295+00:00"
  }
}