OSM Defibrillator Mapping Progress in the 'LA' Postal Area

The blue circles on the map are defibrillator locations from The Circuit that haven't been matched to an OSM object. Dark blue circles indicate those recorded as having 24/7 public access, the lighter blue is for those with restricted access. The red, orange and yellow circles are OSM objects that haven't been matched to a defibrillator on an official list. (AEDs that may not be available 24/7 are shown as orange (either indoor=yes or opening_hours!=24/7 or access!=yes|permissive|public|no|private), AEDs not generally available for public use are shown as yellow (access=no|private), and everything else is shown as red). The green lines represent matches from the official data to OSM objects: dark green for a match via the UUID, and light green for matches just based on proximity. For more information see below. Note that there is currently no licence/permission to use the external data directly in OSM, so it can only be used to inform surveys.

The matching works as follows: First we check each location from the Circuit for an OSM emergency=defibrillator object with a ref:GB:the_circuit tag that matches the UUID. The we check each unmatched Circuit location for the nearest unmatched OSM object with a matching postcode, within 1km of the location. Then we go through all unmatched Circuit locations, and look for any unmatched emergency=defibrillator OSM objects within 50m. If any are found, the nearest is matched. Finally, the previous step is repeated twice more, with increasing maximum distances of 150m and 300m. Note that this matching is not perfect, and if there are multiple nearby AEDs and missing locations in either dataset, then there may be flase positive matches.

• Defibrillators not matched to an OSM Object
• OSM Objects not matched to a defibrillator on an official lists
• Defibrillators matched to an OSM object by location
• Defibrillators matched to an OSM object by reference

Defibrillators not matched to an OSM Object

Found 475 missing AEDs.

OSM Objects not matched to a defibrillator on an official lists

Found 37 unmatched objects.

Note: The entries above are based on a larger bounding box, so will also include unmatched OSM objects from neighbouring postal areas.

Defibrillators matched to an OSM object by location

Found 143 matches.

Defibrillators matched to an OSM object by reference

Found 11 matches.

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Data derived from OpenStreetMap data, © OpenStreetMap Contributors, licensed under Open Data Commons Open Database License (ODbL). XAPI courtesy of Overpass API.