[Talk-GB] UPRN Locations Map

Ed Loach edloach at gmail.com
Fri Jul 3 04:57:43 UTC 2020

Thanks from me too Robert. Of course the first place I zoomed into was where I live. It appears that where the house next door was knocked down (roughly 10 to 15 years ago at a guess) and two built there are three pins. Checking the council's planning portal it was 17 years ago and the application lists 3 associated properties with one being "Site of former (address that was knocked down)". I think it also includes pins at junctions that represent what the council call their "street record" in the planning portal, e.g. for https://idox.tendringdc.gov.uk/online-applications/propertyDetails.do?keyVal=JQS696QB03B01&activeTab=summary


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From: Robert Whittaker (OSM lists) <robert.whittaker+osm at gmail.com>
Sent: Thursday, July 2, 2020 5:38:03 PM
To: talk-gb <Talk-GB at openstreetmap.org>
Subject: [Talk-GB] UPRN Locations Map

I'm not completely sure if/how we can best make use of the new OS
OpenData (UPRNs, USRNs and related links) in OpenStreetMap, but as a
first step I've set up a quick slippy map with the UPRN locations

https://osm.mathmos.net/addresses/uprn/ (zoom in to level 16 to show the data)

The UPRN dataset literally just contains the UPRN number and its
coordinates (both OS National Grid and WGS lat/lon). There are some
additional linking datasets that link these ids to other ids (e.g.
USRNs, TOIDs). But no address information is available directly. (You
may be able to get street names by matching to OS Open Roads via TOIDs
though. Coupled with Code-Point Open, you might be able to assign
quite a few postcodes in cases where there's only one unit for a whole

The UPRN data has already helped me find a mapping error I made
locally though -- it looks like I'd accidentally missed drawing a
house outline from aerial imagery, and also classified a large garage
a few doors down as a house. The two errors cancelled out when the
houses were numbered sequentially, so I didn't notice until now. Today
though I spotted a UPRN marker over some blank space on the map, and
no marker over the mapped house that's probably a garage.

Now a few initial thoughts on the data that I've explored so far:

I believe that the UPRNs are assigned by local authorities, so
conventions may vary from place to place. I don't know who actually
assigns the coordinates (authority or OS). Looking at those for rows
of houses around me, they don't seem to have been automatically given
coordinates from the house footprint, it looks more like someone
manually clicking on a map.

The UPRN dataset should include all addressable properties. It is also
ahead of reality in some places, as it includes locations for houses
on a new development near me that have yet to be built yet. For blocks
of apartments/flats, the UPRN nodes may all have the same coordinates
or may be displaced from each other, possibly in an artificial manner.

Other objects also appear to have UPRNs. Likely things I've noticed so
far include: car parks, post boxes, telephone boxes (even after
they've been removed), electricity sub-stations, roads and recorded
footpaths (the UPRN locations seem to be at one end of the street, so
usually lie at a junction), recreation grounds / play areas,
floodlight poles (around sports pitches), and allotments. There's no
information about the object type in the UPRN data unfortunately.

Anyway, I hope some of this is useful / interesting. I hope to be on
the OSMUK call on Saturday to discuss things further. Best wishes,


Robert Whittaker

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