A geocoded national address file for Australia: The G-NAF what, why, who and when, D Paull

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Content: A Geocoded National Address File for Australia: The G-NAF What, Why, Who and When Daniel Paull Chief Executive Officer PSMA Australia Limited Level 1, 115 Canberra Avenue GRIFFITH, ACT 2603 Phone: (02) 6295 7033 Fax: (02) 6295 7756 E-mail: [email protected]
Keywords: Geocode, National Address File, G-NAF overview, geospatial data, SDI, national dataset, G-NAF access,
Abstract Address provides the vital link between customer and service delivery. As business and government are constantly challenged to find better and more efficient ways to deliver products and services within the information economy, the address has become the means of spatially enabling many information databases. However, an address is often formless, its content transient. It lacks the mathematical consistency required for rigorous matching and analysis. The very things that gave strength to an address as it evolved ­ its flexibility and its openness to interpretation ­ have led to enormous complexities now in data geocoding and address matching. Few disagree that addresses are important and that the problem is not insignificant. So much so that 70% is widely considered to be an acceptable result from a geocoding exercise (or at least there is general acceptance that this is the result that money will buy). PSMA Australia has been collaborating with as many as 15 government agencies and organisations over several years to develop a methodology that would deliver an authoritative and ultimately a definitive Geocoded National Address File (G-NAF) to Australia. On 1 July this year, worked commenced on the building of the G-NAF. It is expected that the initial build will be completed by late December 2003. This paper describes why Australia needs a G-NAF and details the evolution of the G-NAF to date. The G-NAF solution concept is briefly described as are the importance of the many datasets and data contributors. Finally the paper reviews the means of legal and physical access to the G-NAF including future plans to utilise the internet for maintenance and delivery.
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Introduction Decision making relies on the accumulation and analysis of information. Technology has enabled us to accumulate and store ever increasing amounts of information. It could be argued, based on the opening premise, that this should improve decision making however this is only the case where the information can be analysed critically and appropriately. Exponentially increasing the volume of information does not necessarily mean that this is easily achieved. The need to be able to analyse immense volumes of information is nothing new for the spatial information industry. As the saying goes, "A picture is worth a thousand words" ipso facto, a photograph is worth a thousand megabytes. This industry has known for a very long time that the key to the analysis of vast quantities of information is visualisation ­ analysis through graphical representation of information. This concept is slowly creeping across the wider economy. The true benefits of this concept are beginning to dawn on business and government alike. "This is good", I hear you say and it is. But why is it creeping? If it is such a wonderful concept why is it not spreading like wild fire? In order to explore this question let us examine the mechanism by which organisations spatially enable their corporate information in order to conduct analysis by visualisation. The corporate information needs to be linked to location. The logical choice is the location of the customer or asset, or the delivery point for the service or the place where correspondence is sent. And how is this recorded in corporate databases ­ ADDRESS. So in order to utilise the power of geographic visualisation of information most organisations need to relate address to a point on the ground. Problem solved. Easy. All that is required is a geocoded address against which to store all information and this will allow spatial analysis. Problem is that these addresses are not geocoded. Problem is that the addresses come in a multitude of formats and styles with varying amounts of information. Trouble is that the same addresses are often defined differently. Trouble is that there is no definitive source to test address against during data entry. Trouble is because of these things geocoding is difficult, far from perfect and often less than satisfactory, very expensive or both. The concept of a national address reference database complete with geocode has been discussed for some time. Some might say so long that they could be forgiven for thinking such a thing was an urban myth or the Holy Grail! However there has been much activity over the past eight years to bring a Geocoded National Address File (G-NAF) to fruition and it is timely to now discuss that activity in the light of the availability of the G-NAF early in 2004.
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Why G-NAF? It is widely believed that the assembly and delivery of a single authoritative standardscompliant geocoded national address dataset can contribute to significant economic, social and environmental benefits to the nation. While this is a very broad statement to make, it is not unreasonable when a cursory review of activity across all sectors of the economy reveals a fundamental reliance on addresses. So much so that it is commonplace to find address databases being managed and maintained in commercial organisations and across all levels of Government. Furthermore it would be remiss not to mention the growing reliance on the use of spatial data in the analysis of socio-economic data and indeed the management and protection of the environment. The net economic benefits that are achieved from the development and application of G-NAF will be realised principally in the form of embedded cost savings within organisations currently endeavouring to maintain a national address file or part thereof. (Appleyard, 2001) However the availability and accessibility of the G-NAF, coupled with an emergence of geospatial information manipulation and location based technology will no doubt lead to a range of products and services not currently on offer. It is therefore more appropriate to view the impact of the G-NAF in three key ways: Increases in efficiency, so that the same task can be performed with fewer, often significantly fewer, resources; Increases in accuracy, so that the same task can be performed with greater precision and fewer mistakes; New products and services, which could not have been produced without this new technology. (Appleyard, 2001) Why PSMA Australia? The Public Sector Mapping Agencies (PSMA) was established in 1992 in response to the mapping needs of the Australian Bureau of Statistics (ABS). The ABS required a high resolution national topographic and cadastral geospatial database to assist with the management of the 1996 Census of Population of Housing. PSMA was able to achieve, for the first time, the integration of digital mapping datasets from each of Australia's nine Governments. The success of this initiative has collectively led the Governments of Australia to establish the PSMA as a publiC Company1 so that it might continue to contribute to the good of the nation through the establishment of framework national geospatial datasets. It is therefore not surprising that Clifford and Paull (1999) concluded that the only organisation in a position to effectively collate, maintain and disseminate a G-NAF is PSMA Australia. The primary reasons for this finding are:
1 PSMA Australia Limited (Public Sector Mapping Agencies Australia) was incorporated on 21 June 2001 and is a wholly Governments owned unlisted public company that coordinates the assembly of national framework geospatial datasets and facilitates broad access to these datasets to stimulate the economy, assist with the management of the environment and contribute to the formulation of Government policy and provision of Government Services.
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1. PSMA Australia shareholders already collect address data through liaison with local government and attribute these data to a spatial database (the digital cadastral database (DCDB)); 2. Efficient collection, quality control (`data matching') and maintenance can be most effectively achieved using geospatial referencing; 3. When collected geospatially the data can be disseminated either spatially, aspatially or can be attached to road centrelines (as nodes); 4. PSMA Australia has a strong track record and demonstrated ability in the management of the complex relationships and institutional issues associated with the integration of geospatial information from multiple disparate organisations; 5. PSMA Australia had a established and effective mechanism for the facilitation of access to geospatial information through a network of value added resellers; and 6. The creation of the G-NAF satisfies all aspects of the PSMA Australia Vision and its commitment to the establishment of the Australian Spatial Data Infrastructure (ASDI)2. G-NAF Evolution PSMA Australia and Australia Post Activity related to Geocoding of a National Address File stems from discussions between PSMA, Australia Post (Post) and Geospend in June 1995. The primary objective at that time was the attachment of latitudes and longitudes to some 800,000 block face street addresses within the Post address database. The parties recognised from the outset that to achieve this nationally, while being useful and valuable, would be an ambitious and expensive undertaking. In September 1995, PSMA (through the Land Information Centre in Bathurst ­ now LPI) agreed to conduct a pilot data matching and geocoding project over Box Hill postcode area in Victoria. Post staff manually annotated cadastral maps with address information and LIC scrubbed Post and Valuer General data to determine matches. Ground truthing of the result was conducted to reveal an 81% success rate. A further meeting with Post in December 1995 resolved to conduct a further pilot using the postcode areas of Ballarat, Burke and Bathurst. A similar approach was used during 1996 and the success rate was 67%. Using the cost estimates from the trials, it was estimated that to geocode 8 million addresses would cost in the order of $12 million (Mobbs & Grant 1998).
2 The ASDI is a national framework for linking users with providers of spatial information and is similar in concept to a national highway or railway network. The ASDI comprises the people, policies and technologies necessary to enable the generation and use of spatially referenced data through all levels of government, the private sector, non-profit organisations and academia. http://www.anzlic.org.au/infrastructure_ASDI.html
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Establishment of the G-NAF Group Following these pilots with Post and Geospend, other national organisations contacted PSMA to express their interest in the creation of geocoded address files. Those organisations included the Electoral Council of Australia (ECA), Telstra Corporation (Telstra) and the Australian Bureau of Statistics (ABS). The group, including PSMA Australia representing the 9 jurisdictional mapping agencies, became known as the G-NAF Group and in November 1998 met to examine the status of addressing within each of the 11 organisations and assess the commitment from them to collectively build a nation-wide set of geocoded street and property addresses. A Scoping Study (Clifford et al, 1999) was commissioned that explored the need for a G-NAF within these organisations and more broadly and involved PSMA interviewing all major organisations with a known interest in the issue. The PSMA Scoping Study found that: · There was a definite need for a national geocoded address file; · PSMA was the organisation best positioned to collect, collate, maintain and disseminate such a file; · A feasibility study (or staged implementation) was required to clearly define the project boundaries, assess project difficulties and estimate project duration and cost3. At a further meeting of the G-NAF Group, held on 2 August 1999, it was decided to expand the terms of reference for the feasibility study proposed by the scoping study to: · determine the specific requirements of the G-NAF Group through close consultation; · Fix the size, location and extent of the area of the study; · estimate of the costs involved in a feasibility study; · examine the extent of the work done by Intergovernmental Committee on Surveying and Mapping (ICSM) Street Address Working Group (SAWG). The Intergovernmental Committee on Surveying and Mapping Street Addresses were first included in the list of ICSM sponsored themes at the ICSM Wellington, New Zealand meeting (13-14 November 1997). The ICSM SAWG was formally established as a result of Action 98/59 arising from the ICSM Fremantle Meeting 28-29 May 1998. Membership included each State and Territory, Australia Post, Telstra, Australian Electoral Commission, ABS and PSMA. The Street Address Working Group was established to: · Identify a subset of (or additions to) the National Standards (AS4212, DR97275, DR98301 and others) relating to street addresses which are appropriate to the street address component of the ASDI;
3 It is interesting to note that the Scoping Study (Clifford & Paull 1999) included the views of those organisations interviewed and demonstrated that it was widely believed that the G-NAF would cost $710 million.
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· Identify the key components of an address; · Promote street addressing at four levels - national, state, local government and to the individual; · Provide a networking opportunity for the exchange of ideas and approaches to implementing street addressing at a jurisdictional level; · Report on the current status of jurisdictional street address datasets; · Examine the scope and need for geocoding addresses; · Identify and establish consultation and communication mechanisms with user groups; · Develop implementation time-lines and strategies for the above actions. With the inclusion of the G-NAF group members there was a fusing of goals. The work done and the progress made by the SAWG supported and promoted the progress of the G-NAF Group. This excellent collaboration ensured that there would be a high degree of alignment between the refinement of standards relating to addressing, development of systems and procedures within the jurisdictions for the maintenance of addresses and geocodes and the creation of the G-NAF. The Feasibility Study Considering the potential magnitude and complexity of the G-NAF Project, the G-NAF Group through PSMA called for expressions of interest in December 1999 for organisations to conduct a Feasibility Study into the G-NAF. From the eight respondents, four were shortlisted and invited to tender in February 2000. The project was administered and managed by PSMA. The Project Steering Committee comprised a representative from each member of the G-NAF Group. The aims of the Study were to: · devise and test a methodology for the creation of a Geocoded National Address File (G-NAF); · assess and report on the physical and financial feasibility of the creation and maintenance of a G-NAF for Australia; · co-operate with the ICSM and assist in the formation of a new Australian and New Zealand Address Standard and G-NAF data model through detailed implementation of ICSM SAWG Draft Urban and Rural Address Standard; · produce a subset of the G-NAF for the Feasibility study area. The G-NAF feasibility Study was completed in May 2001 and considered to be a significant success with each of the aims comprehensively met. The Study determined that a Geocoded National Address File could be readily compiled relatively inexpensively. Its creation should pose limited technical difficulties but there were significant institutional challenges with the greatest task being the establishment of an exceptional maintenance regime. Without this regime, the authoritative nature of the G-NAF would be undermined, removing the key differentiator from other commercially available datasets. (Geometry, 2001) The Study confirmed that the G-NAF could be built; it devised a robust methodology and generated a methodical data model. It further determined that the methods, technology and software now available had the capacity to significantly reduce costs and for the first time the G-NAF Group were given an estimate for the G-NAF build that seemed achievable ­ two million dollars and 24 months.
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To this point, the research and development costs had been jointly shared by the G-NAF Group. PSMA commissioned a business case analysis into the G-NAF to explore a variety of funding options. Three government agencies, ECA, ABS and CentreLink expressed a willingness to at least partially fund the development. However, after considerable negotiations the parties were unable to settle on a contractual arrangement which both protected the PSMA Australia shareholders (all themselves government agencies) and fully complied with Commonwealth Government procurement guidelines. The approach finally settled upon was for the build and maintenance of the G-NAF to be wholly funded by PSMA Australia.
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The G-NAF Project G-NAF Solution Concept4 There is no definitive or authoritative address list in Australia. There are purpose built address datasets in Australia that are considered reliable for the purpose for which they were built. The concept behind the G-NAF is to use a number of these recognised and relatively independently assembled datasets, each with its own strengths and weaknesses. All contributing data sets will be deemed to have equal status in terms of authoritative data and be weighted equally. Address confidence can then be established by the number of occurrences of an address in different datasets. This differs from the normal approach which is to hold one dataset as a reference to which to compare the others. This analysis and comparison is conducted within a geospatial environment so that each component of each address can be matched against the geospatial region to which it relates: state, locality, street and finally property. This ensures the allocation of an accurate geocode and provides an opportunity to spatially test the logic and consistency of addresses as they are accepted into the G-NAF database. See Annexure A for a diagrammatic overview of the solution concept. The solution itself consists of five phases. Each phase takes the data through a discrete step, testing the validity and accuracy of the content and spatial location of each address. The G-NAF Solution concept is founded on a continuous improvement model. For the initial build which is currently underway, the five phase solution is repeated over five iterations. Each iteration is enhanced and modified depending on the outputs from the previous iterations. Each iteration removes further anomalies and discrepancies from the candidate data. After the build, each iteration will constitute an update and will deliver incremental improvements using the benefits learned from all previous iterations. The solution is structured so that it can accept additional datasets at any iteration and the spatial analysis can be enhanced with the inclusion of updated or additional information. The process is scalable and repeatable with complex history metadata to track how the data has been managed and manipulated. The linage and analysis of each address is recorded so that at any time it can be determined what has happened to an address, when it happened and where it has come from. A multiple iteration solution reduces risks associated with unknowns as strategies can be developed as the issue is uncovered and implemented in the next iteration. Furthermore the multiple iterations allow for the broad review of the detailed content of the G-NAF in its near final form while further improvements are made during the latter iterations. This will ensure a smooth transition for custodians from their old address databases to the G-NAF.
Contributors and Geospatial Datasets The G-NAF is an enormous collection of data and it is all used . Even rejected addresses are held to assist in the rectification of new addresses. The strength of the solution and the feature that makes the process unique in the world is the vast collection of high resolution spatial information that is used in combination with multiple address data sources. In
4 Readers requiring a more detailed technical insight into the workings of the G-NAF solution may wish to refer to the companion paper, "A Geocoded National Address File for Australia: The G-NAF How". In this paper, Richards and Paull (2003) focus on the technical aspects of the G-NAF and detail the GNAF solution in much greater depth.
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contrast for instance, the UK Ordnance Survey's Address Point is a simple two step process: accessing the Postal Address File from Consignia5 and then the geocoding of each address is performed by Ordnance Survey staff and includes in the field GPS capture and confirmation of addresses. This approach is impractical and uneconomical in Australia. The G-NAF sources data from no fewer than 13 organisations6 with an estimated data volume in excess of 20 gigabytes and approximately 25 million address records. In order to access the data, data share arrangements have been instigated with many of the contributors. Under this arrangement there is a free two-way exchange of data. In this way the G-NAF has access to data that it requires to develop an authoritative and ultimately definitive dataset and the contributor receives the benefit of data `purification' through the GNAF process. Australia Post, for example, feeds its National Address File (NAF) to the G-NAF. The data is used in accordance with the solution. The address data is then returned along with details of the outcomes determined through the process for each address. Importantly in this case, Australia Post will include the G-NAF persistent identifier in their Postal Address File (PAF), Post's commercial address dataset available through the AMAS program. This will ensure that there is a direct link and strong alignment between the two datasets ­ one with the Address Delivery Point Identifier (DPID) and the other with the Address Geocode. This type of arrangement facilitates alignment between the G-NAF and contributor datasets so that there is only one address dataset (or a subset) in use by all contributors. Special steps are taken to ensure that this integration is smooth, effective and efficient.
G-NAF Governance The many relationships associated with the G-NAF are both its greatest strength and its greatest challenge. With the diversity of data that will generate confidence in the dataset,comes a diversity of relationships. To a large extent, the success of G-NAF will be related to the strength and endurance of those relationships. For this reason there has been considerable effort directed toward a project governance structure that supports the maintenance and nurturing of these relationships. A G-NAF Reference Group consisting of contributors and key users of the G-NAF has been formed. This group is chaired by a member of the G-NAF Steering Committee and provides comment and feedback specific to each organisation as the project progresses. To assist the G-NAF Reference Group in assessing the technical aspects of the G-NAF and provide additional comment to the project team and data manager, a G-NAF Technical Reference Group has also been constituted. Further to this the linkage, to ICSM SAWG has been maintained with the terms of reference extended to oversee the integration of the G-NAF into internal systems. The SAWG and the G-NAF Technical Reference Group will be the primary mechanism for the delivery of technical information to and from the contributors. Of primary importance here will be ensuring that: · all the information, experience and expertise relating to contributor data is fed into the G-NAF build process; and
5 Consignia plc is a public company formed on 26 March 2001 with the responsibility of delivering a universal postal service under the Postal Service Bill 2000. They were formally known as The Post Office. 6 See Annexure B for a list of the contributing organisations and the contributor datasets.
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· G-NAF is seamlessly integrated into the contributors' own address management systems. Finally, PSMA Australia has engaged the services of a highly regarded Project quality assurance consultant, John Smyrk, to independently monitor the project and report to the Steering committee to ensure; · The realisation of target outcomes from G-NAF; · The meeting of cost and time constraints; and · The minimising the project's risk exposures. The diagram below illustrates the specific structure of the G-NAF Project. Project Steering Committee (CEO + sub committee of PSMA Australia Board)
Project Quality Consultant (John Smyrk ­ Sigma Management Science Pty Ltd)
Project Sponsor (CEO PSMA Australia)
Project Reference Group (ABS, AEC, ECA, Centrelink, Telstra, Australia Post)
Project Manager & Project Team
Technical Reference Group (ABS, AEC, ECA, Centrelink, Telstra, Australia Post)
G-NAF Data Manager (LogicaCMG Pty Ltd in conjunction with Geometry Pty Ltd)
ICSM SAWG (Qld, NSW, ACT, Comm, Vic, Tas, NT, SA, WA)
Standards and Data Models The work of SAWG on the review of address standards and the G-NAF Feasibility Study ran in parallel. Collaboration enabled the physical testing and implementation of the developing standard. Feedback from the Feasibility study was fed into the SAWG and carefully reviewed. As changes were incorporated into the draft standard they were reflected in the GNAF model and so the cycle would continue. The result is a practical standard, the implementation of which has been proven and a G-NAF data model that closely aligns to the standard.7
7 G-NAF is the first physical implementation of the new address standard AS/NZS4819.
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Key features of the G-NAF data model include: · alignment with the Address Standard8; · alignment with the ICSM Harmonised Data Model; · a hierarchical model, which stories information about streets and localities separate from address sites; · metadata linking an address site to the contributor/s and the dataset/s which provided the address details; · aliases in a flexible and data rich manner; · multiple geocodes per address and associated metadata; · multiple addresses for a single geocoded location (e.g. a complex address site). · each address and geocode can be related to the originating dataset · historical information is retained using date_created and date_retired metadata in accordance ICSM Guidelines for Incremental Update procedures. · addresses can be stored and later identified as an alias without major modifications to the database. This will help progressive loading where an existing address is identified as an alias to a new address, either during the build process or as a result of on-going maintenance. · the G-NAF model is more structured than the model depicted in the Address Standard model as records are divided into address field components rather than stored as unstructured text. This structure is the basis of the EXtensible Markup Language (XML) Document Type Definition (DTD) and promotes the submission of well-formed address records by data providers. · whilst abbreviations should be avoided, the model can enforce the use of abbreviations defined in the Address Standard by incorporating these lists of values as look-up tables. · the model can store authoritative data, such as valid streets for a locality, independent of any addresses; · includes a comprehensive data dictionary. Project Timeframes and G-NAF Availability The request for tenders was published 3 May 2003 and closed on 30 May 2003. The evaluation committee made a recommendation to the June meeting of the PSMA Australia Board and contract negotiation commenced shortly thereafter. Work on the G-NAF commenced as planned on 1 July 2003 and is scheduled for delivery to PSMA Australia by 30 November 20039. Once received, PSMA will perform a range of quality assurance tests and seek feedback from each of the contributors on the final content and structure of the GNAF. The dataset will then be released to the market at the beginning of 2004. Updates will immediately commence on a quarterly basis until June 2005, after which they will be availably on a monthly basis. Dependant on Market demand, the availability of monthly updates may be pushed back or brought forward.
8 The draft Standard was released on 29 May 2003 as AS/NZS4819:2003 : Geographic information Urban and Rural Addressing. 9 See Annexure C for a summary of the project timeframe.
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During the G-NAF build, the existing PSMA Australia data access and Pricing Policy will be reviewed and enhanced to include the G-NAF. At this stage the nature of the access is envisaged to be similar to that currently established for other PSMA Australia datasets. A price will be determined in line with PSMA Australia policy, that is, price, access and licensing should not be a barrier to access.10
Conclusion The G-NAF constitutes a significant challenge not only technically but institutionally. It demonstrates the value of collaboration but emphasises the difficulty in bring organisations with different priorities together. The wait for G-NAF has been considerable but hopefully this paper provides an explanation for its considerable gestation. There will be no shortcuts in the build of the G-NAF. G-NAF will be 'the authoritative database of reference in Australia for street address data and the associated geocode attribute'. PSMA Australia has spent considerable time, energy and money investigating and securing the process that will deliver a G-NAF. We are confident that the build methodology is robust and meticulous. It combines a variety of address matching techniques with geospatial analysis to deliver a superior solution of world class standing. With the delivery of G-NAF in early 2004, Australia will, for the first time, have available a comprehensive suite of national geospatial framework datasets: Transport, Topography, Points of Interest, Cadastre and Geocoded Addresses. PSMA Australia's G-NAF may not be the panacea for all spatial analysis problems but this dataset will contribute significantly to Spatially Enabling the Information Economy in Australia.
Acknowledgments Marni Bower, Business Operations Manager, PSMA Australia Limited, for assistance in reviewing this paper and providing constructive criticism.
Bibliography Appleyard, G., November 2001, Business Case Analysis for the Development of a Geocoded National Address File, 27pp, Internal PSMA Document. Clifford, E. and Paull, D., April 1999, Geocoded National Address File (G-NAF) Scoping Study for the Public Sector Mapping Agencies, 44pp, Internal PSMA Document. Geometry Pty Ltd, May 2001, Feasibility Study into a Geocoded National Address File (G-NAF) Version 5.0, 195pp, Report prepared for the G-NAF Group. Mobbs, J. and Grant, Prof. D., Nov 1998, PSMA Position Paper on Geocoding of a National Address File, 35pp, Internal PSMA Document.
10 Further information will be published at http://www.G-NAF.com.au as it becomes available.
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LogicaCMG Pty Ltd and Geometry Pty Ltd, May 2003, LogicaCMG & Geometry Response to the G-NAF Request For Tender, Paull, D., September 1999, Geocoded National Address File (G-NAF): Terms of Reference for a Feasibility Study, 26pp, Internal PSMA Document. Paull, D., December 1999, Geocoded National Address File (G-NAF): Call for Expressions of Interest, 23pp, PSMA briefing package for EOI. Paull, D., February 2000, Provision of a Consultancy to Conduct a Feasibility Study into a Geocoded National Address File (G-NAF): Request for Tenders, 87pp, PSMA briefing package for RFT. http://www.auspost.com.au http://www.ordsvy.gov.uk
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Annexure A
Contributor Address Data
IU Submission Tool Future IU Web Service
Resolution (Future Web Service)
Contributor PSMA Australia Reject Resolution
Resolution (Future Web Service)
Reject
Reject
Data translation
Data Cleansing
Address Scrubbing
Address Processing
Address Standardisation
Standard Address Format
Build/Update Process Build / Update
Associated Spatial Data
Streets (PSMA)
LGA (Jurisdictions)
Suburb/Locality (Jurisdictions)
Gazetteer (PSMA)
Cadastre (PSMA) Rural Address Datum (Jurisdictions)
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Spatial Loading Loader © Copyright PSMA Australia Limited 2003
G-NAF
ANNEXURE B: G-NAF Data Contributors
The G-NAF will include data from the following organisations:
Australian Electoral Commission
Address File (excluding personal details)
Australia Post
National Address File (excluding DPID and personal details) Postcode-Locality lookup file
Queensland Department of natural resources and Mines
Property Location Index (excluding personal details)
Land and Property Information, New South Wales
Address data sourced from the Valuer General's database and from the Integrated Property Warehouse (excluding personal details)
Australian Capital Territory Planning and Land Authority
Address data and geocode information (excluding personal details)
Land Victoria, Department of Sustainability and Environment
Address data and geocode information (excluding personal details)
Information and Land Services, Tasmanian Department of Primary Industries, Water & Environment
Address data and geocode information (excluding personal details)
Land Information, Northern Territory Address data and geocode information (excluding Department of Infrastructure, Planning personal details) and Environment
Environmental Information, South
Address data and geocode information (excluding
Australian Department of Environment personal details)
and Heritage
Western Australian Department of Land Information
Address data and geocode information (excluding personal details)
PSMA Australia Limited
National Transport and Topography Dataset Cadastral Lite Administrative Boundaries (including local government areas, gazetted locality boundaries)
Australian Bureau of Statistics
Statistical Geography including CCD and UCL boundaries.
Committee for Geographical Names in Gazetteer of Australia - edition 2002 Australasia, Intergovernmental Committee on Surveying and Mapping
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Annexure C: Summary G-NAF Build Timeframe
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D Paull

File: a-geocoded-national-address-file-for-australia-the-g-naf-what.pdf
Title: A Geocoded National Address File for Australia: The G-NAF What, Why, Who and When
Author: D Paull
Author: Daniel Paull - CEO PSMA Australia
Subject: Geocoded National Address File
Keywords: National Address File, G-NAF overview, G-NAF history, spatial data, definitative address dataset
Published: Wed Aug 27 13:51:11 2003
Pages: 16
File size: 0.57 Mb


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