Sub title goes here Neil A. Hopper ONS – Titchfield Fareham PO15 5RR Complete your online...

Sub title goes here

Neil A. HopperONS – TitchfieldFarehamPO15 5RR

Complete your online questionnaire on or as soon as possible after 21 March 2021 Complete your online questionnaire on or as soon as possible after 21 March 2021 at at www.census.gov.uk/englandwww.census.gov.uk/england using your unique internet access code: using your unique internet access code:

What do you need to do?What do you need to do?

An address register for all: Bridging the gap between a vision and reality.

The VisionThe Vision

All household and business spaces will be identified and assigned a Unique Property Reference Number and classified correctly.

Detailed attribute and other household intelligence will be attached for use before, during, after and potentially instead of, data collection.

The Register to be frozen and delivered as a Frame for Social and Business surveys, Census and Beyond 2021, to their specification.

Achieving the vision

Based on the Ordnance Survey / GeoPlace product AddressBase Premium.

AddressBase identifies all service delivery points and assigns a UPRN.

Classification of properties in AddressBase is based on consented planning permission.

Attaching household level intelligence may require source addresses to be at higher resolution than postal delivery points.

2021 Census:Address Register requirements

Currently, we are wholly dependent upon the quality Currently, we are wholly dependent upon the quality of AddressBase to meet these targets. of AddressBase to meet these targets.

> 99% Coverage < 3.5% Over-coverage

Residential Frame

Requires that all properties that have residents both exist in the register and can be identified from its classification.

Requires low duplication rates, rapid removal of properties that cannot be found (eg recently demolished) and that non-residential addresses are not classified as residential (eg. sole use as a business).

Address matching is essential....

Desktop evaluation of the quality of AddressBase

Can third party residential address lists be found in ABP and are they classified as residential?

et al for Communal Establishments and Businesses

Improvement and maintenance

Enhanced Register – Address IntelligenceLinkage of household attributes to frame

Evidence of occupancyNumber and demographics of occupants

Structure

Organisation and use of AddressBase

Internal measures of AddressBase quality

AddressBase Quality assessment

Address matching issues

(Basic Land and Property Unit)UPRN assigned by LLPG custodian

or Ordnance SurveyPARENT_UPRNPOSTCODE_LOCATOR

BLPU table

UPRN – links to BLPU tableUSRN – links to Street Descriptor table

LPI table

PAO_START_NUMBERPAO_END_NUMBERPAO_START_SUFFIXPAO_END_SUFFIXPAO_TEXT

SAO_START_NUMBERSAO_END_NUMBERSAO_START_SUFFIXSAO_END_SUFFIXSAO_TEXTPOST_TOWN

1:1 England1:2 Wales

USRNSTREET_DESCRIPTORLOCALITY_NAMETOWN_NAME

Street Descriptor table

UPRN

USRN

Organisation of address data in AddressBase

Organisation table

Classification table

UPRNORGANISATIONLEGAL_NAME

UPRNCLASSIFICATION_CODE

Delivery Point (Address) tableUPRNRM_UDPRNORGANISATION_NAMEDEPARTMENT_NAMESUB_BUILDING_NAMEBUILDING_NAME

PARENT_ADDRESSABLE_UPRNBUILDING_NUMBER THROUGHFARE_NAMEPOST_TOWNPOSTCODEPO_BOX_NUMBER

1:1

1:0,1UPRN

UPRN

1:0,1

UPRN

(Local Property Identifier)



BLPU table



Organisation tableUPRNORGANISATIONLEGAL_NAME


LPI table




FIELD:ORGANISATIONSAO_START_NUMBERSAO_START_SUFFIXSAO_END_NUMBERSAO_END_SUFFIXSAO_TEXTPAO_START_NUMBERPAO_START_SUFFIXPAO_END_NUMBERPAO_END_SUFFIXPAO_TEXTSTREET_DESCRIPTORPOST_TOWNPOSTCODE_LOCATOR

Format of addresses in AddressBase

Example 1:

70

Fulbourne RoadCambridgeCB4 1JN

70 Fulbourne RoadCAMBRIDGECB4 1JN

Postal address:



BLPU table





LPI table






Postal address:

Example 2:

Flat 6

Lenton HallUniversity BoulevardNottinghamNG7 2RD

Flat 6Lenton HallUniversity BoulevardNOTTINGHAMNG7 2RD

University of Nottingham



BLPU table





LPI table






Postal address:

Example 2a:

Room 4A Flat 6

Lenton HallUniversity BoulevardNottinghamNG7 2RD

Room 4AFlat 6Lenton HallUniversity BoulevardNOTTINGHAMNG7 2RD

University of Nottingham



BLPU table





LPI table






Postal address:

Example 3:Consultants Ltd

Third Floor1

5

Ivybridge HouseAdam StreetLondonWC2N 6DD

Consultants LtdThird FloorIvybridge House1-5 Adam StreetLONDON WC2N 6DD

ABP_E25 statisticsEpoch 25 date: 24th July 2014

Total Records England and Wales Current records With DELIVERY

POINT ADDRESS

36.2 Million31.9 Million30.6 Million24.2 Million

21% of current records in England and Wales have no delivery point address

ABP_E25 statisticsEpoch 25 date: 24th July 2014

Total Records England and Wales Current records Residential addresses

With DELIVERY POINT ADDRESS

8% of current residential records in England and Wales have no delivery point address

36.2 Million31.9 Million30.6 Million26.0 Million23.9 Million

85% of records in England and Wales are residential

Simple and Complex records

A simple record has no parent or child: it has an empty PARENT_UPRN field and no other record’s PARENT_UPRN field references its UPRN

(Basic Land and Property Unit)

UPRN PARENT_UPRN

BLPU table

10023133044 10035042395 10035042396

10023133044 10035042395

21004613314

Complex records have parent and/or child relationships

Primary

Structure





One would expect simple and complex:primary records to have a Delivery Point Address

ComplexityRecords

With DPA

Records

With DPA

Records

With DPA

Simple

Complex: Primary

Complex: Child

23.9M

88%

1.1M

53%

5.7M

62%

Overall

ABP_E25

eg 70 Fulbourne Road

eg Lenton Halls of Residence

eg Flat 6, Lenton Hall or Room 4A, Flat 6, Lenton Hall

Dwelling Institute

Residential

20.8M

98%

339 K

88%

4.2M

76%

19.9 K

88%

5.0 K

70%

123 K

17%

LPI tablePAO_START_NUMBERPAO_END_NUMBERPAO_START_SUFFIXPAO_END_SUFFIXPAO_TEXTSAO_START_NUMBERSAO_END_NUMBERSAO_START_SUFFIXSAO_END_SUFFIXSAO_TEXT


One would expect child records, but not simple and complex: primary records, to use secondary addressable object fields

PAO=Primary Addressable ObjectSAO=Secondary Addressable Object

Type Simple

Complex: PrimaryComplex: Child

Total

Records 23.9 M

1.1 M136,77925.1 M

Records 50,560

1,4995.5 M5.6 M

Rate

2.4%

Rate 0.2%0.1%

Uses PAO fields only Also uses SAO fields

illionillion

illionillionillion

Uniqueness of address data in AddressBase

Current records With DELIVERY

POINT ADDRESS

30.6 Million24.2 Million

Only a benefit if the 6 Million addresses are distinguishable

Uniqueness of address data in AddressBase

Current records With DELIVERY

POINT ADDRESS

30.6 Million24.2 Million

There are 4,939 records with non-unique LPI address data Approximately 1 in 6000 records

..... though administrative data sources may only capture the delivery point address.

Distinguishing BLPUs from address dataAddresses with field use inconsistent with their

complexity are more likely to be non-unique

Type Simple

Complex: PrimaryComplex: Child

Total

Records 23.9 M

1.1 M136,77925.1 M

Records 50,560

1,4995.5 M5.6 M

Duplicate 2,768

533338

3,659

Duplicate 625116539

1,280

Rate 0.01%0.05%0.25%0.01%

Rate 1.24%7.74%0.01%0.02%

Uses PAO fields only Also uses SAO fields

1319 (27%) of non-unique records in 5 LAs:Hynburn, Barnet, Warwick, Peterborough and Huntingdonshire

Structure





Approach

Match residential address lists from administrative data sources to Addressbase.

In an idealised world of accurate source data with no duplicates and perfect matching.....

= Match rate x Proportion classified as Residential = Match rate x Proportion classified as Residential

Estimated coverage of a residential frame derived by filtering AddressBase according to record classification

A sample of 590K residential addresses

Using commercial matching software:552K matches of which 6K were duplicates

Classification in AddressBase of the 547K distinct UPRNs matched:

Residential Dwellings97.1%

Other Residential0.9%

Non-Residential2.0%

A sample of 590K residential addresses

Using commercial matching software:552K matches of which 6K were duplicates

Classification in AddressBase of the 547K distinct UPRNs matched:


Other Residential0.9%

Non-Residential2.0%

Proportion of UPRNsthat are Complex

6.3%38.7%64.4%

ResidentialOther ResidentialNon-Residential

99.2% of matched UPRNs relate to residential structures

Parent Shell - 1.1%

Retail - 0.3%Hotels - 0.05%

Education - 0.05%Other - 0.3%

Dual use - 0.2%


Other 0.9%

Non-Residential2.0%

89.4%

27.3%Residential

ProportionComplex with

contentResidential

38.4%

12.2%65.4%26.5%

61.0%

1.2%

Structure





Incorrect matches, commercial software

Correct Structure, wrong level or uniteg. Kinder Apartments, Flat C4, Room 1

THIS_LAYER LAYERS PARENT_UPRN UPRN PAO_TEXT SAO_TEXT1 2 10024192457 KINDER 2 2 10024192457 10024193002 KINDER APARTMENT C42 2 10024192457 10024192814 KINDER ROOM 1 APARTMENT C4

Just wrong

(Matched to UPRN: 10024192457)

21 MILTON AVENUE, LOCKS HEATH, FAREHAM, SO31 6RQ

21 ALTON AVENUE, FAREHAM, PO16 9NQ

3 BEVERLEY CLOSE, PARK GATE, FAREHAM, SO31 6QU

3 BEVERLEY ROAD, FAREHAM, PO14 2NS

22 ORCHARD CLOSE, BLACKWATER, FARNBOROUGH, GU17 9EX

22 ORCHARD ROAD, FARNBOROUGH, GU14 7PR

Input address Output address

Care Quality Commission list of 18626 Care Homes

Matching Failures, commercial software

Administrative 590K residential recordsUnable to match – 7.5%

Unable to match – 26.1%GeoPlace matching process unable to match 2.3%

Matching disagreement – 7.3%

User supply/ABP resolution

SOURCE_ADDRESS UPRN PAO_TEXT SAO_TEXT

HSE 18.3.2.3 TAL-Y-BONT SOUTH 10002522227 HOUSE 18 THIRD FLOOR FLAT 2 ROOM 3

HSE 1.3.D.17 TAL-Y-BONT COURT 10013082082 TALYBONT COURT FLAT 3D ROOM 17

HSE B.1.3.5 TAL-Y-BONT NORTH 10002519488 BYRON HOUSE FLAT 1 ROOM 3

10002519502 BYRON HOUSE FLAT 3 ROOM 5

KINDER APARTMENTS A4 10024192761 KINDER ROOM 1 APARTMENT A4

10024192762 KINDER ROOM 2 APARTMENT A4

10024192763 KINDER ROOM 3 APARTMENT A4

SOURCE_ADDRESS PAO_TEXT SAO_TEXTFROGGATT APARTMENTS APT D4 RM 4 FROGGATT APARTMENTS APARTMENT D4

The Reality

Currently we are reliant on the accuracy of ABP

Address matching problematic, especially for complex addresses commonly associated with Communal Establishments and Businesses

Address complexity is not always fully captured in ABP

Address suppliers often just use postal address, even when higher resolution data available

Records in ABP are highly discernible from their associated address information

Coverage and classification accuracy in ABP appears to be very high, but we need higher

Sub title goes here Neil A. Hopper ONS – Titchfield Fareham PO15 5RR Complete your online...

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