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How to use the GoBike alerts feed

Drop one URL into your mapping tool — points appear on your map, refreshed every 15 minutes.

Pick the URL you want

Each link returns a GeoJSON FeatureCollection. Pick the smallest scope you need; smaller files are faster.

ArcGIS Online no code

1. Open Map Viewer.
2. Click Add → Add Layer from Web.
3. For type, choose A GeoJSON file.
4. Paste the URL (e.g. https://alerts.blossomedge.ai/london.geojson) and click Add Layer.
5. Style points by the label field if you want to colour verified vs unverified separately.

QGIS no code

1. Layer menu → Add Layer → Add Vector Layer…
2. Source type: Protocol: HTTP(S), cloud, etc.
3. Type: GeoJSON.
4. Paste the URL and click Add.
5. QGIS picks up the geometry automatically. Right-click the layer → Properties → Symbology to colour by label.

kepler.gl no code

1. Open kepler.gl/demo.
2. Click Add Data → Load Files → Load from URL.
3. Paste the URL and click Fetch.

Mapbox GL JS code

map.addSource('gobike-alerts', {
  type: 'geojson',
  data: 'https://alerts.blossomedge.ai/london.geojson'
});
map.addLayer({
  id: 'gobike-alerts-layer',
  type: 'circle',
  source: 'gobike-alerts',
  paint: {
    'circle-radius': 4,
    'circle-color': [
      'case', ['==', ['get', 'label'], 'p'], '#16a34a', '#94a3b8'
    ],
    'circle-opacity': 0.7
  }
});

Leaflet code

fetch('https://alerts.blossomedge.ai/london.geojson')
  .then(r => r.json())
  .then(data => {
    L.geoJSON(data, {
      pointToLayer: (f, latlng) => L.circleMarker(latlng, {
        radius: 4,
        color: f.properties.label === 'p' ? '#16a34a' : '#94a3b8',
        fillOpacity: 0.7
      })
    }).addTo(map);
  });

Python (geopandas) code

import geopandas as gpd

gdf = gpd.read_file('https://alerts.blossomedge.ai/london.geojson')
verified = gdf[gdf['label'] == 'p']
print(f'{len(verified)} verified out of {len(gdf)}')
gdf.plot(column='label', markersize=2, legend=True)

Google My Maps no code

1. Create a new map at mymaps.google.com.
2. On a layer, click Import.
3. Choose the Upload tab and drop a GeoJSON file you've downloaded from one of the URLs (My Maps doesn't fetch live URLs).

Refresh behaviour

The data file is regenerated every 15 minutes server-side. CloudFront caches for 60 seconds, so a polite tool that polls hourly will always be at most ~16 minutes behind real time. Tools that auto-refresh (ArcGIS, QGIS, Mapbox) will pick up new alerts on their own polling schedule.

Schema

{
  "type": "Feature",
  "geometry": { "type": "Point", "coordinates": [lng, lat] },
  "properties": {
    "timestamp": 1745234567000,   // Unix ms, UTC
    "label": "p"                  // "p" = verified TP; anything else = unverified
  }
}

Coordinate system is WGS84 (EPSG:4326). Coordinates are in [longitude, latitude] order — the GeoJSON convention.

Licence and attribution

Free to use with attribution: "GoBike hazard alerts, BlossomEdge". All records are anonymised — no userId, no runId, no rider information of any kind. Please don't attempt to re-identify riders.

Need a custom slice?

If you'd like a per-client URL scoped to specific boroughs or cities (so it's "your" feed and won't change scope without notice), email contact@blossomedge.ai.