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OSM Postcode Mapping for SY4 1 Postal Sector

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 comes from Taginfo GB. It is usually updated once a day at about 10:15 UTC, with data from about 20:30 UTC the previous day. (Current data is from 1970‑01‑01 00:00:00 Z.) The data used to compute the OSM mean position comes from the Overpass API and is updated less frequently, usually about once a week. (Current data is from 2024‑03‑23 18:50:30 Z.)

District Sector Units Geo. Units Mapped %
SY4 1 144 144 9 6.2%

All units within this sector:

Unit PQI First Seen Last Seen Street Name ML Mapped
SY4 1AA 10 0
SY4 1AB 10 0
SY4 1AD 10 0
SY4 1AE 10 0
SY4 1AF 10 0
SY4 1AG 10 0
SY4 1AH 10 0
SY4 1AJ 10 0
SY4 1AL 10 0
SY4 1AN 10 0
SY4 1AP 10 0
SY4 1AQ 10 0
SY4 1AR 10 0
SY4 1AS 10 0
SY4 1AT 10 0
SY4 1AU 10 0
SY4 1AW 10 0
SY4 1AX 10 1
SY4 1AY 10 0
SY4 1AZ 10 0
SY4 1BA 10 0
SY4 1BB 10 0
SY4 1BD 10 0
SY4 1BE 10 0
SY4 1BG 10 0
SY4 1BH 10 0
SY4 1BJ 10 0
SY4 1BL 10 0
SY4 1BN 10 0
SY4 1BP 10 0
SY4 1BQ 10 0
SY4 1BS 10 0
SY4 1BT 10 0
SY4 1BU 10 0
SY4 1BW 10 0
SY4 1BY 10 0
SY4 1BZ 10 Nesscliffe Services 3
SY4 1DA 10 0
SY4 1DB 10 Hopton Lane 2
SY4 1DD 10 0
SY4 1DE 10 0
SY4 1DF 10 0
SY4 1DG 10 0
SY4 1DH 10 0
SY4 1DJ 10 0
SY4 1DL 10 0
SY4 1DN 10 0
SY4 1DP 10 0
SY4 1DQ 10 0
SY4 1DR 10 0
SY4 1DS 10 0
SY4 1DT 10 0
SY4 1DU 10 0
SY4 1DX 10 2 1
SY4 1DY 10 0
SY4 1DZ 10 0
SY4 1EA 10 0
SY4 1EB 10 Holyhead Road 2
SY4 1ED 10 1
SY4 1EE 10 0
SY4 1EF 10 0
SY4 1EG 10 0
SY4 1EH 10 0
SY4 1EJ 10 0
SY4 1EL 10 0
SY4 1EN 10 0
SY4 1EP 10 0
SY4 1EQ 10 0
SY4 1ER 10 0
SY4 1ES 10 0
SY4 1ET 10 0
SY4 1EU 10 0
SY4 1EW 10 0
SY4 1EX 10 0
SY4 1EY 10 0
SY4 1EZ 10 0
SY4 1FA 10 0
SY4 1FB 10 0
SY4 1FD 10 0
SY4 1FE 10 0
SY4 1FF 10 2023‑01 0
SY4 1FG 10 0
SY4 1FH 10 0
SY4 1HA 10 0
SY4 1HB 10 0
SY4 1HD 10 0
SY4 1HE 10 0
SY4 1HF 10 0
SY4 1HG 10 0
SY4 1HH 10 0
SY4 1HJ 10 0
SY4 1HL 10 0
SY4 1HN 10 0
SY4 1HP 10 0
SY4 1HQ 10 0
SY4 1HS 10 0
SY4 1HT 10 0
SY4 1HU 10 0
SY4 1HW 10 2 0
SY4 1HX 10 1
SY4 1HY 10 0
SY4 1HZ 10 0
SY4 1JA 10 0
SY4 1JB 10 0
SY4 1JD 10 Olden Lane 1
SY4 1JE 10 0
SY4 1JF 10 0
SY4 1JG 10 0
SY4 1JH 10 0
SY4 1JJ 10 0
SY4 1JL 10 0
SY4 1JN 10 0
SY4 1JQ 10 0
SY4 1JR 10 0
SY4 1JT 10 0
SY4 1JW 10 0
SY4 1JY 10 0
SY4 1JZ 10 0
SY4 1LA 10 Church Street 1
SY4 1LB 10 0
SY4 1LD 10 0
SY4 1LE 10 0
SY4 1LF 10 0
SY4 1LG 10 0
SY4 1LH 10 0
SY4 1LJ 10 0
SY4 1LL 10 0
SY4 1LP 10 0
SY4 1LQ 10 0
SY4 1LR 10 0
SY4 1LS 10 0
SY4 1LT 10 0
SY4 1LU 10 0
SY4 1LW 10 0
SY4 1LX 10 0
SY4 1LY 10 0
SY4 1LZ 10 0
SY4 1NA 10 0
SY4 1NB 10 0
SY4 1ND 10 0
SY4 1NE 10 0
SY4 1NF 10 0
SY4 1NG 10 0
SY4 1NH 10 2021‑12 0
SY4 1WB 10 2013‑07 7 0
SY4 1WS 10 7 0
SY4 1WX 10 7 0
SY4 1ZZ 10 2019‑01 47 0

Units with street mismatches in this sector:

Unit Mapped Dominant Street OSM Object Tagged Street
SY4 1AX 1 w980591035
SY4 1DB 2 Hopton␣Lane w597708583
SY4 1DX 1 n2113528516
SY4 1EB 2 Holyhead␣Road w437807810
SY4 1ED 1 w437807809
SY4 1HX 1 w405862099
Data derived from OpenStreetMap data, © OpenStreetMap Contributors, licensed under Open Data Commons Open Database License (ODbL). Data derived in part using Code-Point Open under the Open Government Licence v3; Contains OS data © Crown copyright and database right 2020; Contains Royal Mail data © Royal Mail copyright and Database right 2016; Contains National Statistics data © Crown copyright and database right 2020.