CodePoint user guide
Contents
1. defines data classifications FEATCLASS 07 Section Header Record coordinate and structure types unit scale factors and so on SECHREC 15 Point Record identifies the definition of a unit postcode POINTREC 21 Geometry Record defines the two dimensional geometry for a unit postcode GEOMETRY 1 14 Attribute Record defines the attributes or details of a unit postcode ATTREC 99 Volume Terminator Record defines the end of the transfer set VOLTERM dls Volume Header Record VOLHDREC 01 Field Position Format Value example Description REC_DESC 01 02 A2 01 Record type identifier DONOR 03 22 A20 ORDNANCE SURVEY lt 5S gt RECIPIENT 23 42 A20 lt 20S gt Not used TRANDATE 43 50 D8 19970401 Date of processing CCYYMMDD SERIAL 51 54 14 0000 Customer sequence number VOLNUM 55 56 12 01 Volume number always 01 NTFLEVEL 57 57 11 2 NTF Level 2 NTFVER 58 61 R4 2 0200 NTF Version 2 00 NTFOR 62 62 Al V Variable length records EOR 63 63 A1 Sets EOR to on formatted media DIVIDER 64 64 A1 Divider used to terminate variable length text fields CONT_MARK 65 65 1 0 No continuation record EOR 66 66 Al Record terminator Record example OIORDNANCE SURVEY 1997040100000120200V 10 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template Database Header Record DBHREC 02 Field Position REC_DESC 01 02 DBNAME 03 22 DDNAME 23 42 DDDATE 43 50 DDBASE 51 70 DDBDATE2. 71 78 CONT_MARK 79 79 EOR 80 80 Format A2 A20 A20 D8 A20 D8 Al Al Continuation of Database Header Record REC_DESC 01 02 FCNAME 03 22 FCDATE 23 30 DQNAME 31 50 DQDATE 51 58 DATA_MODEL 59 60 CONT_MARK 61 61 EOR 62 62 A2 A20 D8 A20 D8 12 Al Al Value example 02 CODE_POINT_2002 1 0 lt S gt DEFAULT_02 00 lt 7S gt 19920515 lt 20S gt 00000000 4 00 CODE_POINT_03 02 lt 4S gt 19990401 lt 20S gt 00000000 02 0 Description Record type identifier Database name Code Point dataset version Standard NTF data dictionary name Date of standard data dictionary Not used Not used Continuation record follows Record terminator Continuation record identifier Code Point specification version 2 02 see note Creation date of dataset Not used Not used Data model type spaghetti No continuation record Record terminator Notes The Code Point specification version number gives the major version before the decimal point 2 in the above example and after it the supply option 2 in the example CODE_POINT_02 02 Code Point product Record example 02CODE_POINT_2002 1 0 DEFAULT_02 00 OOCODE_POINT_03 02 19990401 2 3 19920515 000000001 00000000020 4 5 7 8 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template dls Attribute Description Record ATTDESC 40 Field Position Format Value example REC_DE
3. Positional quality indicator PQI Attributes Administrative and health authority codes Quality statements NTF explained An overview of the data in NTF Introduction Record size u ee ee ee ee ee ee BPRRUNDDI ILL Chapter 6 Chapter 7 Chapter 8 Appendix A Appendix B Continuation mark CONT_MARK Record terminator EOR Transfer set Transfer set structure Volume records Database records Section records Supply of data on media Formatted media Record structures for the transfer of Code Point in NTF NTF record list Volume Header Record VOLHDREC 01 Database Header Record DBHREC 02 Attribute Description Record ATTDESC 40 Feature Classification Record FEATCLASS 05 Section Header Record SECHREC 07 Point Record POINTREC 15 Geometry Record GEOMETRY1 21 Attribute Record ATTREC 14 Volume Terminator Record VOLTERM 99 Comma Delimited Files CDF explained An overview of the data in CDF format Record structures for the transfer of Code Point in CDF CDF fields Glossary Introduction Code Point glossary Product and service performance report form Chapter 1 Introduction Code Point is an Ordnance Survey data product that provides a National Grid coordinate for a point within each unit postcode in Great Britain Code Point features With each coordinated point Code Point products provide information about the number and type of postal delivery points in the postcode a positional qua
4. 0 N Ireland 152 delivery point A Royal Mail defined point to which mail is delivered This may be a property private address organisation mailbox or even the name of an individual These categories are derived from The Complete Guide to Posicode Products from Royal Mail Distinct from the addressed premise because there may be more than one organisation at an address Gridlink Gridlink is the name given to a joined up government initiative involving Royal Mail the Office for National Statistics the General Registry Office Scotland Ordnance Survey Northern Ireland and Ordnance Survey All these organisations are involved in the georeferencing of postcodes and the relating of postcodes to administrative and National Health areas and so on inward code or incode See postcode Land Line data The Ordnance Survey s definitive product range of large scale maps in digital form Land Line has a vector point and line structure which collectively forms 36 feature codes with a further 27 feature codes in Land Line Plus representing an accurate and detailed representation of the real world large user postcode A large user postcode is allocated when a firm or business at a new address regularly receives in any one day 25 or more items of mail in a town area or 50 or more items in a rural area a private box PO box is provided Royal Mail Selectapost service is provided a Business Reply or Freepost licence is taken out o
5. 21 GEOM_ID 03 08 16 000000 GTYPE 09 09 Al 1 NUM_COORD 10 13 14 0001 IX_COORD 14 20 17 0272530 IY_COORD 21 27 17 0196956 IQPLAN 28 28 Al lt S gt CONT_MARK 29 29 Al 0 4 EOR 30 30 Al Description Record type identifier Not used Defines point geometry Number of coordinate pairs Easting Northing Not used No continuation record or continuation record follows Record terminator Postcodes which have no coordinated position will be given zero coordinates 00000000000000 and the positional quality indicator in the accompanying Attribute Record will be set to 0 Record examples 210000001000102725300196956 0 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template Attribute Record ATTREC 14 Field Position Format Value example Description REC_DESC 01 02 A2 14 Record type identifier ATT_ID 03 08 16 000000 Not used IVAL_TYPE 09 10 A2 PC Attribute mnemonic IVALUE 11 SO515RU Attribute value CONT_MARK er Al 0 No continuation record or 1 continuation record follows EOR gt Al Record terminator The pair of fields VAL_TYPE and VALUE will repeat to specify all the attributes required lt may be necessary to utilise a continuation record to specify all attributes The Attribute Record will contain all or some of the following fields Attribute Fixed or mnemonic Description variable Size PC Unit postcode F A7 PQ Positional quality indicator F 1 PR PO box
6. Code Point User guide Preface Contact details This user guide contains all the information you need to make effective use of Code Point and is designed to help you understand the information contained in the data as well as providing detailed technical information and the data format specification This user guide has been checked and validated before issue and every endeavour made to ensure that the contents are accurate lf you find an error omission or otherwise wish to make a suggestion as to how this user guide can be improved please contact us at the address shown under Contact details or use the Product performance report form at appendix B The Customer Contact Centre will be pleased to deal with your enquiries Customer Contact Centre Phone 023 8030 5030 Fax 023 8079 2615 Email enquiries ordsvy gov uk or write to Sales Information Ordnance Survey Romsey Road SOUTHAMPTON United Kingdom S016 4GU Visit Ordnance Survey on our web site at www ordnancesurvey co uk dls Product performance If you have any problems with or identify any errors in the Code Point data please complete the Product performance report form at appendix B Liability The terms and conditions of supply and use of Code Point are detailed in the business geographic products order form and in the licence document supplied with the product Ordnance Survey makes every effort to ensure that data supplied are free from erro
7. National Statistics ONS Ordnance Survey of Northern Ireland OSNI and the General Register Office for Scotland GROS via ADDRESS POINT and Boundary Line Updates are supplied annually depending upon the terms of your contract and are also available on request Updates are provided as a complete resupply but do not include deleted postcodes Code Point content Code Point provides the following data unit postcode PQI PO box indicator total number of delivery points within unit postcode number of delivery points with the same PQI as the unit postcode itself number of domestic delivery points number of non domestic delivery points number of delivery points which are PO boxes number of premises with a matched address number of unmatched delivery points National Grid CPLC country code National Health Service regional health authority code National Health Service health authority code administrative county code administrative district code administrative ward code and postcode type dls Formats Code Point is available in e BS 7567 NTF v2 0 Level 2 and e Comma Delimited File CDF NTF NTF is the standard transfer format for most of Ordnance Survey s digital map data products Code Point is supplied in NTF v2 0 Level 2 which has been formally recognised as a British Standard BS 7567 For convenience BS 7567 NTF v2 0 Level 2 is referred to as NTF throughout this
8. SC 01 02 A2 40 VAL_TYPE 03 04 A2 PR FWIDTH 05 07 A3 001 or lt 3S gt FINTER 08 12 A5 A1 lt 3S gt ATT_NAME 19 A PO box indicator DIVIDER en Al CONT_MARK EE Al 0 EOR Al Description Record type identifier Attribute mnemonic for example PO box indicator Fixed width of attribute or three spaces if variable width Interpretation of field A if variable width Name given to attribute No continuation record Record terminator Notes An attribute description will be needed to describe all attributes used in Code Point data All the attributes that may appear within the data are given in the record examples below Record examples 40PC007A7 40PQ00111 40PRO01A1 40TP00313 40DQ00313 40RP00313 40BP00313 40PD00313 40MP00313 40UM00313 40CY00313 40RH003A3 40LH003A3 40CC002A2 40DC002A2 40WC002A2 40LS001A1 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template Unit postcode 0 Positional quality indicator 0 PO box indicator 0 Total number of delivery points 0 Delivery points with same PQI Indicator as unit itself 0 Domestic delivery points 0 Non domestic delivery points 0 PO box delivery points 0 Matched address premises 0 Unmatched delivery points 0 Country code 0 NHS regional health authority code 0 NHS health authority code 0 Administrative county code 0 Administrative district code 0 Administrative ward code 0 Postcode type 0 d
9. ant entries Code Point glossary ABCDEFGHIJKLMNOPQRSTUVWXYZ addressed premise A permanent or non permanent building structure with an address being a potential delivery point for Royal Mail Examples of an addressed premise would be a house a flat within a block of flats a caravan site a bollard to which several houseboats may be moored or an organisation occupying the whole of a building ADDRESS POINT An Ordnance Survey text data product which relates Royal Mail Postcode Address File PAF addressed properties within Great Britain to the National Grid area based postcode A type of large user postcode which is allocated to a small number of organisations who receive an exceptionally large amount of mail These postcodes still relate to a geographical area but may overlap other sector areas or be scattered building A physical walled structure connected to foundations that has or will have a roof This definition includes buildings surveyed at foundation stage CPLC Code Point location coordinate A National Grid reference for each unit postcode It is a two dimensional coordinated point to a resolution of one metre Coordinates are attributed from ADDRESS POINT using an accuracy hierarchy Country code The code used by Office of National Statistics to indicate the country in which the Code Point georeference lies This has replaced the PAF update date field Country Code England 064 Scotland 179 Wales 22
10. ants Point Record POINTREC This record identifies the start of the data for a single unit postcode and contains a feature serial number that is unique within any one section Geometry Record GEOMETRY1 This record contains the coordinate position of the unit postcode identified in the previous point record All coordinate values within Code Point are given with a precision of one metre Attribute Record ATTREC The Attribute Record gives the attributes or details of the unit postcode for example the postcode itself positional quality indicator and so on This logical record may have one or more continuation records to transfer all the attribute information dls Supply of data on media Formatted media Data requested on logically formatted media such as CD ROM as defined by current Ordnance Survey product specifications will be written directly to the output device The data files will be written to the medium sequentially See also chapter 6 Chapter 6 Record structures for the transfer of Code Point in NTF NTF record list This list comprises the valid record types used in the Code Point NTF transfer set Descriptor Description Record name 01 Volume Header Record defines the donor and data type VOLHDREC 02 Database Header Record transfers data about the database DBHREC 40 Attribute Description Record defines attribute descriptions and their fields ATTDESC 05 Feature Classification Record
11. building of the matched address closest to the postcode mean determined automatically by Ordnance Survey or OSNI BT postcode area only 20 As above but determined to visual inspection by GROS 30 Approximate to within 50 m of true position postcodes relating to developing sites may be within 100 m true position 40 The mean of the positions of addresses previously matched in ADDRESS POINT but which have subsequently been deleted or recoded very rarely used 50 Estimated position based on surrounding postcode coordinates usually to 100 m resolution but 10 m in Scotland 60 Postcode sector mean direct copy from ADDRESS POINT mainly PO boxes See glossary for additional information 90 No coordinates available Attributes Attribute Description Postcode Contains elements for postal area district sector and unit See Postcode in this chapter Positional quality Indicates the source of the ADDRESS POINT data indicator used and hence the quality of the coordinates provided for each record It is determined by the best available data in ADDRESS POINT PO box indicator Denotes if the postcode is used for a PO box Total delivery points The total number of both matched and unmatched delivery points in the postcode Attribute Delivery points used to the CPLC where the PQI value is 10 or 20 Domestic delivery points Non domestic delivery PO box domestic delivery points Matched addressed premises Unmatched delivery points Eas
12. ces with a Database Header Record DBHREC which sets up the database lt will be followed by a number of Attribute Description Records ATTDESC and Feature Classification Records FEATCLASS Database Header Record DBHREC This mandatory record indicates the commencement of a database and gives details of e the database name e NTF release date e the supply option and e creation date that applies to the whole transfer set Attribute Description Record ATTDESC These records list and give descriptions of the attributes that can be applied to the features within the transfer set Feature Classification Record FEATCLASS These records list and give descriptions of the feature codes that can be present within the transfer set Section records The section records contain the Code Point data within the postcode area being transferred by that section It starts with the Section Header Record SECHREC and is followed by a number of Section Data Records that contain data on all the unit postcodes within the section In Code Point these data records consist of a sequence of three logical records which is repeated for each unit postcode within the section Section Header Record SECHREC This mandatory record starts a section It contains information and parameters essential for understanding interpreting and processing some of the fields within the data lt establishes the unit of measure for X and Y coordinates origins and other const
13. comparison against Boundary Line data In the case of unitary authorities 00 is given for administrative county the authority code appears as the district code Where a district or unitary authority is divided into electoral districts the code appears as the ward code Postcodes with a PQI of 90 or 60 are not allocated codes Chapter 4 Quality statements Each Code Point record contains an individual quality statement the PQI which is explained in chapter 3 Lineage where does the data come from Code Point is derived from Gridlink data ADDRESS POINT which was initially created from a comparison of the Royal Mail PAF with Land Line and OSCAR datasets from Ordnance Survey and administrative and national health area codes used by ONS but allocated using Boundary Line data Currency how up to date is the data Currency is a measure of the real world change included in Code Point Monthly postcode updates from the Royal Mail Postzon and PAF together with improvements derived from Ordnance Survey field activity are included in each version of Code Point Positional accuracy is it in the right place Each CPLC is coordinated on the National Grid with eastings and northings quoted to a resolution of one metre The accuracy of each unit postcode coordinate pair is defined by the PQI which provides a quality statement of that Code Point record Attribute accuracy are the attribute values correct The representat
14. e postcode district A sub area of the postcode area specified by the character substring within the first half of a full postcode which may be numeric alphabetic or alphanumeric for example 42 from MK42 6GH or 1A from W1A 4WW There are approximately 2 800 postcode districts in Great Britain Note There are certain non geographic districts In these instances a district code is allocated to cover all large users in the postcode area postcode sector A sub area of postcode district whose area is identified by the number third from the end of a full postcode There are approximately 9 000 postcode sectors in Great Britain An example of a postcode sector code is 3 from GU12 3DH Post Office box Generally a non geographic address allocated with a number by the Post Office PO Boxes within ADDRESS POINT are now matched to the Royal Mail delivery office at which they are based except in the BT postcode area rather than the average of matched addresses within the postcode sector This will enable PO boxes to be matched with a PQI value of 10 Postzon A file marketed by Royal Mail that allocates a National Grid reference to each postcode unit This coordinate is derived from a 100 metre square that contains the first of the range of addresses that form the unit postcode unit postcode See postcode Appendix B Product performance report form Ordnance Survey welcomes feedback from its customers about Code Point If yo
15. ecord name between the brackets lt S gt This is the space character ASCII code 32 lt 3S gt This denotes three successive space characters The percentage character ASCII code 37 Record size NTF data is written to the supply media in variable length records with a maximum physical record length of 80 characters which includes CONT_MARK continuation mark and EOR record terminator Continuation mark CONT_MARK Continuation records are used where the maximum physical record length of 80 characters does not permit a logical record to be transferred wholly within one physical record The presence of a continuation record is indicated by the value of the continuation mark CONT_MARK that immediately precedes the record terminator EOR The value of CONT_MARK is 1 if there is a continuation record present and 0 if there is not Record terminator EOR The last character of each physical record is the end of record terminator which is the percent character ASCII 37 Transfer set A transfer set normally equates to a single file Transfer set structure Volume records Each transfer set starts with a compulsory Volume Header Record VOLHDREC and terminates with a compulsory Volume Terminator Record VOLTERM Database records Database records transfer information common to all data and their presentation in the subsequent section s An NTF transfer set will comprise one database The database commen
16. eiving mail There may be many delivery points within an individual building structure as shown in Land Line data postcode An abbreviated form of address made up of combinations of between five and seven alphanumeric characters A postcode may cover between 1 and 100 addresses The average number of addresses per postcode is 15 There are two main components of a postcode e The outward code also called outcode The first two to four characters of the postcode constituting the postcode area and the postcode district It is the part of the postcode that enables mail to be sent from the accepting office to the correct area for delivery e The inward code also called incode The last three characters of the postcode constituting the postcode sector and the postcode unit It is used to sort mail at the local delivery office For example OUTWARD INWARD NW 6 4 DP unit postcode sector district area postcode area An area given a unique alphabetic coding by Royal Mail to facilitate the delivering of mail The area is identified by one or two alpha characters at the start of the full postcode the letters being derived from a town city or district falling within the postcode area There are at present 120 postcode areas in Great Britain for example SO for Southampton MK for Milton Keynes B for Birmingham or W for London West The postcode area code constitutes the first part of the outward cod
17. indicator F Al TP Total number of delivery points F 13 DQ Delivery points used to create the CPLC where PQI value is 10 or 20 F 13 RP Domestic delivery points F 13 BP Non domestic delivery points F 13 PD PO box delivery points F 13 MP Matched address premises F 13 UM Unmatched delivery points F 13 CY Country code F 13 RH NHS regional health authority code F A3 LH NHS health authority code F A3 CC Administrative county code F A2 DC Administrative district code F A2 WC Administrative ward code F A2 LS Postcode type F Al MS dls Attributes with null data will be omitted from this record Each of the attribute mnemonics will be defined in an Attribute Description Record ATTDESC 40 at the start of the transfer set Record example 14000000PCSO515RUPQ3 PRNTP017DQ017RP017BP000PD000MP017UM000RV19990215RHY06LHQD31 00CC24DCUNWCEWOS 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template Volume Terminator Record VOLTERM 99 Field Position Format Value example REC_DESC 01 02 A2 99 FREE_TEXT 03 A CONT_VOL rn 11 0 EOR BE Al The FREE_TEXT field will comprise the message End Of Transfer Set Record example 99End Of Transfer Set0 Description Record type identifier Message see note below No continuation volume follows Record terminator 1234567890123 4567890123456789012345678901234567890123456789012345678901234567890 Template Chapter 7 Comma Deli
18. ints 13 Field separator Al 1 MP Matched address premises 13 i Field separator Al 1 UM Unmatched delivery points 13 A Field separator A1 1 EA Eastings 17 A Field separator Al 1 NO Northings 17 ES Field separator Al 1 i CY Country code 13 3 Field separator Al 1 MS dls Mnemonic Description Format Size Description RH NHS regional health authority code A3 3 Field separator Al 1 LH NHS health authority code A3 3 Field separator Al 1 CC Administrative county code A2 2 Field separator Al 1 3 DC Administrative district code A2 2 Field separator A1 1 WC Administrative ward code A2 2 Field separator Al 1 LS Postcode type Al 1 Those fields containing text that is alphanumerics A will be enclosed by double quotes which have not been included in the sizes listed above Fields with null data will appear as for text or O for a numeric Each record will be terminated with a carriage return character ASCII 13 and a line feed character ASCII 10 Examples of a Code Point CDF record SO515RU 10 N 17 17 17 0 0 17 0 437015 120914 064 Y06 QD3 24 UN FW S Appendix A Introduction Glossary The purpose of this chapter is to provide a glossary of terms used in the definition of products services licensing and other terms and conditions for Code Point Where terms refer to other terms within the glossary they are connected by means of hot links to the relev
19. ion of postcode attributes is checked as part of Royal Mail maintenance of PAF and by Ordnance Survey when coordination and quality assurance of ADDRESS POINT is carried out during field survey activity Logical consistency is the data structure correct Logical consistency is a measure of the degree to which Code Point data agrees with its specified structure Data is monitored to ensure that attributes are present in the correct format and in valid combinations Completeness is it all there Code Point contains coordinates for all available unit postcodes supplied to Ordnance Survey from the Royal Mail PAF Resources are directed towards continually improving attribute and positional accuracy Deleted postcodes are not included Errors and omissions which are identified by customers can be referred to Ordnance Survey for investigation and where appropriate onward notification to Royal Mail Chapter 5 NTF explained An overview of the data in NTF Introduction This chapter gives an outline of the data structure of Code Point in NTF It should be read in conjunction with chapter 6 There are certain conventions used in the record examples which are 1 Square brackets are placed around record names for example VOLHDREC A pair of braces denote field names for example REC_DESC is the record descriptor field 21 A two digit number following square brackets denotes the record descriptor which uniquely identifies the r
20. ledgement User guide copyright Trademarks This user guide is Crown copyright 2002 All rights reserved It is supplied with Code Point to allow you to make effective use of the data Any part of the guide may be copied for your own business use Business use is defined as actions related to business decision making or as part of day to day operations associated with the running of a business No part of the guide may be copied or incorporated in products services or publications you generate for onward sale or as free promotional or support material without the prior written permission of Ordnance Survey Ordnance Survey the OS Symbol ADDRESS POINT Code Point Gridlink Land Form PANORAMA Land Line Land Line Plus and OSCAR are registered trademarks and Boundary Line is a trademark of Ordnance Survey the national mapping agency of Great Britain PAF Postzon and Royal Mail are registered trademarks of Consignia plc Ordnance Survey acknowledges all other trademarks Contents Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 MS Introduction Code Point features Applications of Code Point What you need to use Code Point Supply definition Update Code Point content Formats NTF Comma Delimited File CDF Overview of Code Point Data overview Basic principles Application overview Uses of Code Point Scenarios Code Point explained Reference Postcode Position Code Point location coordinate CPLC
21. lity indicator PQI which indicates the quality of the data underlying the Code Point location coordinate CPLC the country indicator either England Scotland Wales or Northern Ireland the postcode type the National Health Service region and area codes and the local government county district and ward codes Applications of Code Point Code Point provides a comprehensive base of geographically located data on which a wide range of applications can be built Typical applications include market analysis risk analysis for insurance financial and environmental services site location analysis for retailing lifestyle analysis and approximate site location for route planning dls What you need to use Code Point Code Point is a data product and does not include software for analysis but can be used with a variety of programs Code Point can be loaded onto any desktop PC To exploit fully the potential of Code Point the recommended requirements are at least a 486 PC or equivalent Consult your geographical information system GIS vendor to establish actual system requirements Supply definition Code Point is only available as national cover of Great Britain and Northern Ireland and is supplied on CD ROM containing CDF and NTF data Update Code Point is recreated quarterly using updates from Ordnance Survey field surveys and Gridlink a consortium made up of Royal Mail RM Ordnance Survey the Office of
22. ls Feature Classification Record FEATCLASS 05 Field Position Format Value example Description REC_DESC 01 02 A2 05 Record descriptor FEAT_CODE 03 06 14 2801 Feature code CODE_COM 07 16 A10 lt 10S gt Not used STCLASS 17 36 A20 lt 20S gt Not used FEATDES 37 A Unit Postcode Point Textual description of feature classification DIVIDER ne Al Divider used to terminate variable length fields CONT_MARK ae l1 0 No continuation record EOR vr Al Record terminator variable integer Record example 052801 Unit Postcode Point 0 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template Section Header Record SECHREC 07 Field REC_DESC SECT_REF COORD_TYPE STRUC_TYP XYLEN XY_UNIT XY_MULT ZLEN Z_UNIT Z_MULT X_ORIG Y_ORIG Z_DATUM CONT_MARK EOR Position Value example 07 SO lt 8S gt 2 4 00007 2 0000001000 00006 2 0000001000 0000000000 0000000000 0000000000 4 Description Record type identifier Postcode area covered by dataset Defines rectangular coordinates Defines vector data Defines X_COORD Y_COORD as seven digit fields Defines X and Y units as metres Multiply X and Y coordinates by 1 000 Defines Z coordinates as six digit fields Defines Z units as metres Multiply Z units by 1 000 Origin of National Grid zero Origin of National Grid zero Not used Continuation record follows Record terminator dls Continuation
23. mited Files CDF explained An overview of the data in CDF format CDF is a de facto standard method for delivering data This is provided to suit customers requiring a simple business use CDF can be used in a word processing package or presented as a spreadsheet Code Point information in CDF is held within individual fields Each field is either textual for example SO515RU or numeric for example 21 Within CDF each field is separated from the next by a comma lf the field is textual then the text is enclosed in double quotes for example SO515RU This method of representation can also be referred to as Comma Separated Value or Comma Separated Variable CSV All coordinate values within Code Point are given with a precision of one metre See also chapter 8 Chapter 8 Record structures for the transfer of Code Point in CDF CDF fields The CDF will contain the following fields separated by commas in the following order Mnemonic Description Format Size Description PC Unit postcode A7 7 Field separator Al 1 PQ Positional quality indicator 11 1 Field separator Al 1 PR PO box indicator Al 1 Field separator Al 1 TP Total number of delivery points 13 Field separator Al 1 DQ Delivery points used to create the CPLC where the PQI value is 10 or 20 13 Field separator Al 1 RP Domestic delivery points 13 7 Field separator A1 1 BP Non domestic delivery points 13 Field separator Al 1 PD PO box delivery po
24. numeric abbreviated form of address A postcode will uniquely identify an average of 15 addresses In some cases where a customer receives a substantial amount of mail a postcode will apply to only one address a large user postcode The maximum number of addresses in a postcode is 100 The postcode is held in Code Point as a seven character field Although when used in an address the incode should be separated from the outcode by a single space within Code Point data there may be 0 1 or 2 spaces between these elements of the postcode The following is a list of the valid formats of postcode held An A indicates an alphabetic character an N indicates a numeric character Format Example Example as held in Outcode Incode postcode Code Point AN NAA M2 5BQ M2 5BQ ANN NAA M34 3AB M34 3AB AAN NAA DN5 7XY DN5 7XY AANN NAA DN16 9AA DN169AA ANA NAA W1A 4WW W1A 4WW AANA NAA EC1A 1HQ EC1A1HQ Please refer to the glossary for a further description of postcode Postcode example Area District Sector Unit KY 12 8 UP dls Position Code Point location coordinate CPLC Code Point provides an NGref to a resolution of 1 metre for each unit postcode in Great Britain and Northern Ireland and is known as the CPLC A CPLC is normally allocated to a point that falls within the extent of the unit postcode The point is given the ADDRESS POINT coordinates of the nearest delivery point to the calculated mean position of the delivery points in
25. of Section Header Record Field Position Format Value example Description REC_DESC 01 02 A2 00 Continuation record identifier XMIN 03 12 110 0000000000 Not used YMIN 13 22 110 0000000000 Not used XMAX 23 32 110 0000000000 Not used YMAX 33 42 110 0000000000 Not used XY_ACC 43 47 R5 2 00000 Not used Z_ACC 48 52 R5 2 00000 Not used SURV_DATE 53 60 D8 00000000 Not used LAST_AMND 61 68 D8 00000000 Not used COPYRIGHT 69 76 D8 19990401 Effective copyright date CONT_MARK 77 77 Al 0 No continuation record EOR 78 78 Al Record terminator Record example 07SO 21000072000000100000006200000010000000000000000000000000000000001 00000000000000000000000000000000000000000000000000000000000000000000199904010 T 2 3 4 5 6 7 8 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template Point Record POINTREC 15 Field Position Format Value example Description REC_DESC 01 02 A2 15 Record type identifier POINT_ID 03 08 16 000051 Feature serial number range 000001 999999 VAL_TYPE 09 10 A2 lt 2S gt Not used VALUE 11 16 A6 lt 6S gt Not used FEAT_CODE 17 20 A4 2801 Point feature code CONT_MARK 21 21 Al 0 No continuation record EOR 22 22 Al Record terminator Record example 15000051 28010 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template dls Geometry Record GEOMETRY1 21 Field Position Format Value example REC_DESC 01 02 A2
26. r all Freepost and Business Replies have their own postcode matched address An address resulting from a match between the Land Line address data and the PAF which has been allocated a coordinate position The match may be a result of either manual or automatic matching the latter encompassing both full and fuzzy logic matching National Grid reference NGref The National Grid provides a unique reference system that can be applied to all Ordnance Survey maps of Great Britain The map of Great Britain is covered by 100 km by 100 km grid squares with the origin lying to the west of the Isles of Scilly When a National Grid reference is quoted the easting left to right direction is always given before the northing upwards direction A National Grid reference to one metre will identify the spatial position of the CPLC non geographic postcodes Special non geographic postcodes are allocated to single organisations who receive an exceptionally large amount of mail These are included in Code Point outward code or outcode See postcode PAF Postcode Address File The PAF was created when all the separately held information was assembled and stored on a Royal Mail central computer system PAF now contains the postal addresses and postcodes of approximately 26 million delivery points in Great Britain including approximately 170 000 large users postal address A postal address is a delivery point which is currently rec
27. rs and omissions We will remedy as soon as reasonably practicable errors and omissions that the customer notifies us of in writing It is the customer s responsibility to ensure that data ordered is suitable for the intended purpose We will not be liable to the customer or any other party for any loss damage inconvenience or expense resulting from the use of or reliance upon the data Delivery of Code Point You are advised to copy the supplied data to a back up medium Rejecting the product To reject the product you must contact us within 28 days of delivery and must confirm your instructions in writing If you do not we will assume that you are satisfied with them You cannot reject the products after this time If you are a consumer as defined in the Consumer Transactions Restriction on Statements Order 1976 this paragraph does not affect your statutory rights Data copyright All Ordnance Survey digital map data are Crown copyright Full details of the conditions under which our digital map data may be processed and or manipulated or copied by a customer whether or not for use on PCs or workstations or for making hard copies are available from the Customer Contact Centre please see Contact details You should check the terms and conditions with us before using the data It is also the responsibility of the holder of the digital map data to ensure that any plotted or printed output contains the required copyright acknow
28. t e Statistical analysis e Crime analysis e Flood warnings e Pollution monitoring Scenarios Medical research for health authorities It is necessary for health authorities to be able to analyse and identify the effects and potential implications of contamination Is the incidence of bronchitis uneven throughout a health authority s area Does this relate to air quality Customer survey for market research purposes A questionnaire has been distributed to all houses within a large geographical area The results and the relationships between groups of customers need to be analysed Incident analysis for emergency services An ambulance service wishes to assess the efficiency and value of various mobile unit locations in reducing call response times Insurance for financial services JS Insurance has been asked to quote structural insurance for a potential customer within the Southampton SO area SO has been labelled geographically as a clay area and therefore insurance companies charge higher premiums because of the higher incidence of subsidence With the use of Code Point JS Insurance can closely highlight blocks of houses within SO on clay If a particular house does not fall within this category JS Insurance can with no risk quote a premium which is lower than the market average Chapter 3 Code Point explained Reference The full postcode itself forms a unique reference Postcode Postcodes are an alpha
29. tcode there may be a small number of instances where coordinates cannot be allocated e Multiple postcodes in a single block of flats or offices will share one NGref these may be either large users or small users or both e Administrative area codes are allocated using the Boundary Line polygon that the CPLC falls within currency is that of the latest available Boundary Line data Where addresses in a postcode fall in two or more administrative areas only the codes for the area in which the CPLC falls are given e NHS codes are allocated using the premise that areas are always supersets of administrative areas Of Application overview Uses of Code Point Code Point forms a nationally consistent postcode reference and is a standard link between e Databases and GIS e Two or more databases Retail Market analysis and profiling Sales analysis by store Competitor analysis Market analysis and profiling Store location Targeting promotions Insurance e Market analysis and profiling Competitor analysis Geological and flood risk analysis Personal and household risk assessment Sales territory management Health e Targeting of services to population needs e Plan resource allocation e Epidemiology e Analysis of What if scenarios Utilities Assessment of markets for targeting Consumption analysis Pressure zone analysis Transport Location finding Route planning Governmen
30. the unit A lower positional quality CPLC will be allocated to unit postcodes awaiting a surveyed position or which relate to addresses that will not have a surveyed position on Land Line data Where several unit postcodes apply to one surveyed position for example a block of flats or offices there is an identical CPLC for each There may be occurrences where the position of the CPLC is distorted by the erroneous allocation by Royal Mail of a postcode to an address outside the contiguous geographical extent of that postcode These distortions may also affect the allocation of NHS and administrative area codes and or the size or extent of a postcode polygon Such occurrences when discovered or notified to Ordnance Survey by customers will be referred to Royal Mail for possible improvement Positional quality indicator PQI The importance of checking the PQI to establish CPLC positional quality cannot be overemphasised It indicates the positional accuracy of the Code Point coordinates There are seven PQI values for the positional quality of CPLCs The order shown indicates the level of quality associated with the PQI PQ10 is the most accurate and PQ90 the least The PQI assigned to the CPLC will depend on the coordinates available in ADDRESS POINT to generate the CPLC Those derived from addresses with a PQ3 in ADDRESS POINT will therefore be assigned a PQ10 in Code Point PQI Description of source ADDRESS POINT data 10 Within the
31. ting Northing Country code NHS regional health authority code NHS health authority code Administrative county code Administrative district code Administrative ward code Postcode type Description Number of matched addresses in the postcode unit of the same positional quality in create ADDRESS POINT as the PQI for that postcode in Code Point provided that the Code Point record has a PQI value of 10 or 20 Number of non PO box delivery points that have no PAF organisation name Number of non PO box delivery points that have a PAF organisation name Number of PO box delivery points Number of PQ3 ADDRESS POINT delivery points in buildings or building sub divisions after exclusion of duplicated coordinate pairs Number awaiting improvement to PQ3 ADDRESS POINT Distance in metres east of National Grid origin Distance in metres north of National Grid origin Code used by ONS to identify the country in which the Code Point georeference lies See glossary Region in which CPLC falls Area in which CPLC falls County in which CPLC falls District in which CPLC falls Ward in which CPLC falls Indicates whether the user is large L or small S Large postcode type users receive more than 25 items in rural areas 50 in towns or 100 in large towns or cities Administrative and health authority codes Administrative and health authority codes are those used by ONS Allocation of codes to postcode is by point in polygon
32. u would like to share your thoughts with us please print a copy of the form and when completed post it to the address below YOUPINAMMES sce A O Organisation tii a ieee A A eetanieeds BONES iia Email aia POSICOGE HREEFARFFINERBEREPERENETENTOTERELTEHSEREELPELEEREL TE PERERIERNERTRELERFEFFEEREREEFERTEERRGEEFERFFEREHERREEER Quotation or order reference ccccncnncocooooononcnnnnonononononnnananns Please record your comments or feedback in the space below Please post this form to Ordnance Survey Code Point Product Manager Romsey Road Maybush SOUTHAMPTON SO16 4GU dls
33. user guide The structure of Code Point supplied in NTF is described in chapter 5 and chapter 6 Comma Delimited File CDF CDF is a standard method for delivering data It is a common interchange format for spreadsheets and databases and facilitates simplistic use of Code Point For convenience this is referred to as CDF throughout this user guide The structure of Code Point supplied in CDF is described in chapter 7 and chapter 8 Chapter 2 Data overview Basic principles Overview of Code Point Code Point provides National Grid coordinates for each unit postcode in Great Britain The data source for Code Point is Gridlink which consists of ADDRESS POINT Boundary Line and Land Line data Royal Mail s Postcode Address File PAF and Postzon products and National Health Service NHS and administrative area codes provided by ONS ADDRESS POINT contains postal address data for approximately 26 million postal delivery points These delivery points may be premises that are shown in Land Line data such as buildings or they might be features that do not form part of the Land Line specification such as PO boxes caravan parks buildings under railway arches temporary buildings and houseboats All unit postcodes in PAF which have valid and current postal delivery points will be in Code Point e Each unit postcode will be allocated a National Grid reference NGref of a point that falls within the notional extent of the unit pos
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