The circles on the map above are the postcode unit 'centriods' from Code-Point Open, under the Open Government Licence. The 'centriod' is calculated by taking the average of the coordinates of all the delivery points with that postcode, and then snapping that location to the nearest delivery point in that postcode. The data may be freely used in OpenStreetMap, but please make sure you understand it first. Also please only add postcodes to objects representing addressable entities; do not add the postcode centroids as themslves. Suggested source tag code-point_open
The circles are coloured by whether or not there is at least one OSM object with that value in its addr:postcode tag. Click on a point to see the postcode. The numbers in brackets are the number of OSM objects with that postcode.
The centroids are the location of the nearest 'delivery point' to the arithmetic mean of the coordinates of all the delivery points within that unit. Those points with a codepoint PQI greater than 40 are excluded from the map above. (Higher values are typically not geographically accurate. In particular, PQI=50 is used for new postcodes before the location has been determined. The location given for such postcodes seems to be derived from other existing postcodes with similar units letters, which may not be close to the new postcode.)
The pale blue lines from the circles join each Code-Point Open centroid to the mean coordiantes of all the OSM objects with that postcode. (For ways an relations, the centre of the rectangular bounding box is used at the coordinates for the OSM object.) Long lines may indicate missing or incorrect OSM objects for that postcode. In particular, if all the postcodes in a givne unit are correctly mapped, the circle should be located on the nearest delivery point within that postcode to the other end of the blue line.
The OSM data for the number of objects with each unit is usually updated once a day at about 10:15 UTC, with data from about 20:30 UTC the previous day. The data used to compute the OSM mean position is updated less frequently, usually about once a week.
District | Sector | Units | Geo. Units | Mapped | % |
---|---|---|---|---|---|
WD3 | 6 | 68 | 68 | 15 | 22.1% |
All units within this sector:
Unit | PQI | First Seen | Last Seen | Street Name | ML | Mapped |
---|---|---|---|---|---|---|
WD3 6AA | 10 | 0 | ||||
WD3 6AB | 10 | 0 | ||||
WD3 6AD | 10 | 0 | ||||
WD3 6AE | 10 | 0 | ||||
WD3 6AF | 10 | 0 | ||||
WD3 6AH | 10 | Sarratt Road | 1 | |||
WD3 6AJ | 10 | 0 | ||||
WD3 6AL | 10 | 0 | ||||
WD3 6AN | 10 | 0 | ||||
WD3 6AP | 10 | 0 | ||||
WD3 6AQ | 10 | Sarratt Road | 1 | |||
WD3 6AR | 10 | 0 | ||||
WD3 6AS | 10 | 1 | ||||
WD3 6AT | 10 | 1 | ||||
WD3 6AU | 10 | 0 | ||||
WD3 6AW | 10 | 0 | ||||
WD3 6AX | 10 | 0 | ||||
WD3 6AY | 10 | 0 | ||||
WD3 6AZ | 10 | 0 | ||||
WD3 6BA | 10 | 0 | ||||
WD3 6BB | 10 | 0 | ||||
WD3 6BD | 10 | 0 | ||||
WD3 6BG | 10 | 0 | ||||
WD3 6BH | 10 | 0 | ||||
WD3 6BJ | 10 | 0 | ||||
WD3 6BL | 10 | 0 | ||||
WD3 6BN | 10 | 0 | ||||
WD3 6BP | 10 | 0 | ||||
WD3 6BQ | 10 | 0 | ||||
WD3 6BR | 10 | The Green | 1 | |||
WD3 6BS | 10 | 0 | ||||
WD3 6BU | 10 | 0 | ||||
WD3 6BW | 10 | 0 | ||||
WD3 6BX | 10 | 0 | ||||
WD3 6BY | 10 | 0 | ||||
WD3 6BZ | 10 | 0 | ||||
WD3 6DA | 10 | 0 | ||||
WD3 6DB | 10 | 0 | ||||
WD3 6DD | 10 | 0 | ||||
WD3 6DL | 10 | 0 | ||||
WD3 6DN | 10 | 0 | ||||
WD3 6EA | 10 | Green Street | 12 | |||
WD3 6EB | 10 | Amersham Road | 2 | |||
WD3 6ED | 10 | Village Road | 2 | |||
WD3 6EE | 10 | 0 | ||||
WD3 6EG | 10 | 0 | ||||
WD3 6EH | 10 | 0 | ||||
WD3 6EJ | 10 | 0 | ||||
WD3 6EL | 10 | 0 | ||||
WD3 6EN | 10 | Amersham Road | 1 | |||
WD3 6EP | 10 | 0 | ||||
WD3 6EQ | 10 | Village Road | 1 | |||
WD3 6ER | 10 | Chenies | 2 | |||
WD3 6ES | 10 | 0 | ||||
WD3 6ET | 10 | 0 | ||||
WD3 6EU | 10 | Chenies | 1 | |||
WD3 6EW | 10 | Chenies Road | 4 | |||
WD3 6EX | 10 | 0 | ||||
WD3 6EY | 10 | 0 | ||||
WD3 6FA | 10 | Latimer Chase | 7 | |||
WD3 6HA | 10 | North Hill | 8 | |||
WD3 6HB | 10 | 0 | ||||
WD3 6HD | 10 | 0 | ||||
WD3 6HE | 10 | 0 | ||||
WD3 6HH | 10 | 0 | ||||
WD3 6HJ | 10 | 0 | ||||
WD3 6HL | 10 | 0 | ||||
WD3 6HN | 10 | 0 | ||||
WD3 6XN | 10 | 2013‑07 | 0 | |||
WD3 6ZZ | 10 | 0 |
Units with street mismatches in this sector:
Unit | Mapped | Dominant Street | OSM Object | Tagged Street |
---|---|---|---|---|
WD3 6AS | 1 | w406827268 | ||
WD3 6AT | 1 | n316612561 | ||
WD3 6EB | 2 | Amersham␣Road | w619265598 | |
WD3 6ED | 2 | Village␣Road | w1084918766 | Latimer␣Road |
WD3 6ED | 2 | Village␣Road | w619265570 | Chenies␣Village |
WD3 6ER | 2 | Chenies | w111868876 |