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OSM Postcode Mapping for SA1 4 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 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 %
SA1 4 108 100 28 28.0%

All units within this sector:

Unit PQI First Seen Last Seen Street Name ML Mapped
SA1 4AB 10 0
SA1 4AE 10 Dillwyn Street 1
SA1 4AF 10 0
SA1 4AG 10 St Helen's Road 1
SA1 4AJ 10 0
SA1 4AN 10 St Helen's Road 1
SA1 4AP 10 0
SA1 4AQ 10 Dillwyn Street 2
SA1 4AW 10 St Helens Road 1
SA1 4AY 10 St. Helens Road 1
SA1 4AZ 10 0
SA1 4BB 10 0
SA1 4BD 10 0
SA1 4BE 10 0
SA1 4BG 10 St Helens Road 1
SA1 4BL 10 St Helen's Road 1
SA1 4BQ 10 St Helens Road 5
SA1 4DE 10 0
SA1 4DF 10 0
SA1 4DG 10 0
SA1 4DH 10 4 0
SA1 4DJ 10 0
SA1 4DL 10 4 0
SA1 4DN 10 4 0
SA1 4DQ 10 St Helen's Road 1
SA1 4DT 10 0
SA1 4DW 10 4 0
SA1 4EH 10 Northampton Lane 2
SA1 4ES 10 0
SA1 4EU 10 0
SA1 4EW 10 Christina Street 3
SA1 4EY 10 0
SA1 4EZ 10 0
SA1 4HE 10 0
SA1 4HF 10 0
SA1 4HH 10 0
SA1 4HN 10 0
SA1 4HR 10 0
SA1 4HS 10 Duke Street 1
SA1 4HT 10 0
SA1 4HW 10 0
SA1 4HX 10 0
SA1 4HZ 10 0
SA1 4JE 10 Bryn-y-mor Road 5
SA1 4JG 10 Bryn-y-mor Road 1
SA1 4JH 10 Bryn-y-mor Road 1
SA1 4JJ 10 Brynymor Road 2
SA1 4JL 10 0
SA1 4JN 10 0
SA1 4JP 10 0
SA1 4JQ 10 Bryn-y-mor Road 2
SA1 4JR 10 0
SA1 4JS 10 0
SA1 4JT 10 0
SA1 4JU 10 0
SA1 4JW 10 0
SA1 4JY 10 0
SA1 4JZ 10 0
SA1 4LH 10 King Edwards Road 2
SA1 4LL 10 0
SA1 4LN 10 0
SA1 4LP 10 0
SA1 4LS 10 0
SA1 4LT 10 0
SA1 4LU 10 King Edward's Road 1
SA1 4LW 10 0
SA1 4LX 10 0
SA1 4LY 10 0
SA1 4LZ 10 0
SA1 4NA 10 0
SA1 4ND 10 0
SA1 4NE 10 Catherine Street 1
SA1 4NF 10 0
SA1 4NG 10 0
SA1 4NH 10 0
SA1 4NJ 10 10 0
SA1 4NL 10 10 0
SA1 4NN 10 St Helens Avenue 1
SA1 4NP 10 0
SA1 4NQ 10 0
SA1 4NR 10 10 0
SA1 4NS 10 10 0
SA1 4NT 10 0
SA1 4NW 10 0
SA1 4PA 10 10 0
SA1 4PB 10 10 0
SA1 4PD 10 10 0
SA1 4PE 10 Guildhall Road South 10 2
SA1 4PF 10 St Helen's Road 2
SA1 4PN 10 10 1
SA1 4PQ 10 Mumbles Road 2
SA1 4PS 10 0
SA1 4PT 10 0
SA1 4PU 10 2018‑07 0
SA1 4PY 10 2 0
SA1 4PZ 10 2 0
SA1 4QA 10 0
SA1 4QF 10 0
SA1 4QG 10 0
SA1 4QH 10 0
SA1 4QJ 10 0
SA1 4QL 10 0
SA1 4QN 10 0
SA1 4QP 10 0
SA1 4QQ 10 0
SA1 4QR 10 1
SA1 4QS 10 0
SA1 4QT 10 0
SA1 4QX 10 Bryn-y-mor Crescent 1
SA1 4YA 10 74 0

Units with street mismatches in this sector:

Unit Mapped Dominant Street OSM Object Tagged Street
SA1 4BQ 5 St␣Helens␣Road n2476451783 Saint␣Helen's␣Road
SA1 4JQ 2 Bryn-y-mor␣Road w465405833 Brynymor␣Road
SA1 4LH 2 King␣Edwards␣Road n4603703798 King␣Edward␣Road
SA1 4PE 2 Guildhall␣Road␣South r1824794
SA1 4PF 2 St␣Helen's␣Road w459202591 Saint␣Helen's␣Road
SA1 4PN 1 w459202592
SA1 4QR 1 w123699337
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.