G-NAF. Reflections on the past decade. Brian Marwick. Presented by

Transcription

1 G-NAF Reflections on the past decade Presented by Brian Marwick

2 Overview of presentation Who are PSMA Australia The main features of G-NAF Overview of methodology Reflections on the past ten years of building and maintaining GNAF

3 PSMA Australia Limited What an unlisted public company, established under Australia s Corporations Act, wholly owned by the State, Territory and Australian Governments. Why How to ensure the substantial value inherent within national spatial datasets can be readily accessed so as to deliver economic, social and environmental benefits to Australia by forming and managing a crucial supply chain between creators and users of fundamental spatial information by aggregating, integrating and distributing national spatial datasets.

4 What Why How PSMA Australia Limited Datasets built by PSMA PSMA Australia Limited is an unlisted public company, established under Australia s Corporations Act, wholly owned by the State, Territory and Australian Governments. Transport & Topography (Roads, Railways, Airports) CadLite (Cadastral parcels) Land Tenure To ensure that the substantial value inherently held within national spatial datasets can be readily accessed so as to deliver economic, social and environmental benefits to Australia Administrative Boundaries (Localities, LGA, Electoral) Postcode Boundaries Features of Interest G-NAF (Geocoded National Address File) By forming and managing a crucial supply chain between creators of fundamental spatial information and users of this information by aggregating, integrating and distributing national spatial datasets.

5 G-NAF: Geocoded National Address File the authoritative address index for Australia contains the State, Suburb, Street, Number and coordinate reference (geocode) for street addresses in Australia comprises addresses supplied by the states and territories of Australia, Australian Electoral Commission (AEC) and Australia Post the G-NAF methodology developed by PSMA Australia uses a range of spatial and aspatial validation techniques first released in March 2004 updated every three months 39 updates now completed currently holds some 13.1 million principal addresses

6 Overview of methodology spatial and aspatial Validation of all addresses from multiple contributors against Gazetted Localities PSMA Admin Boundaries Road Centrelines PSMA Transport geocodes assigned to addresses are flagged to indicate level of compliance with reference datasets Locality only = 5 Street Level = 4 Parcel / property level = 2 addresses are also assigned a value indicating level of agreement between contributors (i.e. 2, 1, 0, -1 )

7 Overview of methodology G-NAF Maintenance Software (e.g. QLD) reference data files contributor data files ADDRESS_DETAILS_CHAR ADDRESS_DETAILS_CHAR ADDRESS_DETAILS_CHAR GNAF_QLD GNAF_AEC_QLD GNAF_AUSP_QLD G-NAF Maintenance Pre-processing rule generation SCRUB Process G-NAF Maintenance Software log files LOCALITY MATCH Process STREET MATCH Process Geocoded National Address File (G-NAF) MERGE Reports GNAF_GNAF_QLD Data Extraction Street Geocoder Process G-NAF Data Address Geocoder Process

8 The unique combination of fields below constitutes a separate address which will generate a unique ADDRESS_DETAIL_PID STATE_ABBREVIATION LOCALITY_NAME PRIMARY_POSTCODE STREET_NAME STREET_TYPE STREET_SUFFIX NUMBER_FIRST_PREFIX NUMBER_FIRST NUMBER_FIRST_SUFFIX NUMBER_LAST_PREFIX NUMBER_LAST NUMBER_LAST_SUFFIX FLAT_NUMBER_PREFIX FLAT_NUMBER FLAT_NUMBER_SUFFIX LEVEL_NUMBER

9 What Why PSMA Australia Limited Reflections on the past 10 years PSMA Australia Limited is an unlisted public company, established under Australia s Corporations Act, wholly owned by the State, Territory and Australian Governments. multiple contributors use of reference datasets to validate addresses quality of addressing To ensure that the substantial value inherently held within national spatial datasets can be readily accessed so as to deliver economic, social and environmental benefits to Australia the nature of addresses in Australia How By forming and managing a crucial supply chain between creators of fundamental spatial information and users of this information by aggregating, integrating and distributing national spatial datasets.

10 Multiple contributors Maximises the likelihood of all addresses being in the dataset

11 What Why How PSMA Australia Limited Multiple contributors PSMA Australia Limited is an unlisted public company, established under Australia s Corporations Act, wholly owned by the State, Territory and Australian Governments. Results in the duplication of addresses due to the differences in the address string used by contributors for the same site. Duplicates may exist in GNAF at: Locality level To correct ensure street that name the substantial in wrong locality value inherently held within main highway national vs spatial local name datasets can be readily accessed so Road as to type deliver issue (e.g. economic, Place vs social Court) and environmental benefits to Australia Different street name such as properties with multiple street frontages By forming and managing a crucial supply chain between creators Use of ranged of fundamental addresses (e.g. spatial 20 vs information 20 26) and users of this Use information of Level numbers by aggregating, (e.g. Level 5, integrating 505/20 Smith and St vs 505/20 distributing Smith St) national spatial datasets. Use of number first suffix (e.g. 27A, 27B, 27C) Street Level Parcel level

12 What Why PSMA Australia Limited Use of Reference Datasets PSMA Australia Limited is an unlisted public company, established under Australia s Corporations Act, wholly owned by the State, Territory and Australian Governments. provides a focus for the alignment of addresses from multiple contributors adds to the authority of GNAF through enforced linkage to gazetted locality and street names To ensure that the substantial value inherently held within national spatial datasets can be readily accessed so as to deliver economic, social and environmental benefits to Australia at times, creates some challenges given gazetted locality and street names are not necessarily static How By forming and managing a crucial supply chain between creators of fundamental spatial information and users of this information by aggregating, integrating and distributing national spatial datasets.

13 Use of Reference Datasets Example LGA Orange NSW

14 Use of Reference Datasets Changes in street names also occur Nov 2013 Feb 2014

15 The Quality of Addressing Nationally has been a gradual progress

16 The Quality of Addressing Nationally has been a gradual progress Conf. 2 Confidence Level of Addresses in G-NAF Conf. 1 Conf. 0 9,000,000 8,000,000 7,000,000 6,000,000 5,000,000 4,000,000 3,000,000 2,000,000 1,000,000 0 Aug-04 Nov-04 Feb-05 May-05 Aug-05 Nov-05 Feb-06 May-06 Aug-06 Nov-06 Feb-07 May-07 Aug-07 Nov-07 Feb-08 May-08 Aug-08 Nov-08 Feb-09 May-09 Aug-09 Nov-09 Feb-10 May-10 Aug-10 Nov-10 Feb-11 May-11 Aug-11 Nov-11 Feb-12 May-12 Aug-12 Nov-12 Feb-13 May-13 Aug-13 Nov-13 Feb-14

17 What Why How PSMA Australia Limited The nature of addresses in Australia PSMA Australia Limited is an unlisted public company, established under Australia s Corporations Act, wholly owned by the State, Territory and Australian Governments. What is an address? address itself is simply an idea To ensure that the substantial value inherently held within national spatial datasets can be readily accessed so as to deliver economic, social and environmental benefits to Australia an artefact of human communication a shared syntax for referring to location an agreement between our institutions regarding names, numbers, and invisible administrative boundaries By forming and managing a crucial supply chain between creators of fundamental spatial information and users of this information by aggregating, integrating and distributing national spatial datasets.

18 What Why How PSMA Australia Limited The nature of addresses in Australia PSMA Australia Limited is an unlisted public company, established under Australia s Corporations Act, wholly owned by the State, Territory and Australian Governments. And it is also a label often selected by people based upon social and cultural preferences in preference to an official reference. To ensure that the substantial value inherently held within national spatial datasets can be readily accessed so as to deliver economic, social and environmental benefits to Australia used often enough such that it will exist in Government and commercial databases By forming and managing a crucial supply chain between creators of fundamental spatial information and users of this information by aggregating, integrating and distributing national spatial datasets. a data type that to date, lacks the mathematical consistency for rigorous matching and analysis at a national level

19 The nature of addresses in Australia

20 The nature of addresses in Australia

21 Conclusion The past ten years have seen a significant improvement in addressing in Australia GNAF has demonstrated that the quality of addresses is dependent on the quality of other foundation datasets, namely administrative boundaries and road centrelines. Addresses play an important role in how people communicate information and as such have a strong cultural component This needs to be recognised as the status of addresses move closer to an authoritative status as one of the foundation datasets. Addresses are playing a far greater role than even before in the community Finally the past ten years should be seen as the first phase of journey to meet the increased demand for consistency and currency.

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