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Geolocation JSON Example

Geolocation JSON example with latitude, longitude, accuracy, altitude, and reverse-geocoded address. Matches the browser Geolocation API and GeoJSON formats.

{
  "coords": {
    "latitude": 21.1702,
    "longitude": 72.8311,
    "accuracy": 15,
    "altitude": 12.5,
    "altitudeAccuracy": 5,
    "heading": 270,
    "speed": 0
  },
  "timestamp": 1716268800000,
  "address": {
    "street": "MG Road",
    "city": "Surat",
    "state": "Gujarat",
    "postalCode": "395007",
    "country": "India",
    "countryCode": "IN",
    "formattedAddress": "MG Road, Surat, Gujarat 395007, India"
  },
  "source": "gps",
  "provider": "google_maps"
}

Field Reference

coords.latituderequirednumberDecimal degrees north/south. Range: -90 (south pole) to +90 (north pole).
coords.longituderequirednumberDecimal degrees east/west. Range: -180 to +180. Positive = east.
coords.accuracyrequirednumberEstimated accuracy radius in metres. Lower is better. GPS is typically 2-15m.
coords.altitudeoptionalnumber | nullAltitude in metres above sea level. null if the device cannot determine it.
timestamprequiredinteger (Unix ms)When the location was sampled, in milliseconds since the Unix epoch.
sourceoptionalstringLocation source: gps, network, ip, manual. Each has different accuracy characteristics.

Variants

Browser Geolocation APIExact shape returned by navigator.geolocation.getCurrentPosition().
Browser Geolocation API
{
  "coords": {
    "latitude": 21.1702,
    "longitude": 72.8311,
    "accuracy": 15,
    "altitude": null,
    "altitudeAccuracy": null,
    "heading": null,
    "speed": null
  },
  "timestamp": 1716268800000
}
GeoJSON PointRFC 7946 GeoJSON format used by PostGIS, Mapbox, and mapping libraries.
{
  "type": "Feature",
  "geometry": {
    "type": "Point",
    "coordinates": [
      72.8311,
      21.1702
    ]
  },
  "properties": {
    "name": "Surat City Center",
    "accuracy": 15,
    "timestamp": 1716268800000
  }
}

Common Use Cases

  • →Real-time location tracking for delivery and logistics apps
  • →Store locator — finding the nearest branch to the user's position
  • →Geotagging photos, posts, or check-ins with coordinates
geolocationGPScoordinatesmapslocation

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Frequently Asked Questions

GeoJSON (RFC 7946) uses [longitude, latitude] order — the opposite of what most people expect. The browser Geolocation API uses separate named fields (latitude, longitude). Always use named fields when possible to avoid confusion.

5 decimal places give ~1 metre accuracy, which is sufficient for most apps. 7 decimal places give centimetre accuracy (surveying). Storing 14+ decimal places is meaningless for GPS data — the hardware is not that precise.

GPS uses satellites for high accuracy (2-15m) but is slow to acquire (10-30 seconds) and drains battery. Network location uses Wi-Fi and cell towers: responds in milliseconds but is less accurate (20-2000m). The browser Geolocation API combines both automatically.

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