Dudley Metropolitan Borough: A Land and Property DNF Case Study Brian Higgs Corporate GIS Manager

1. Dudley Metropolitan Borough:A Land and Property DNF Case StudyBrian HiggsCorporate GIS Manager

2. Introduction • What weaknesses exist in our current position • Why we have chosen to change • How we are implementing the project • The process we have adopted • The results so far • Benefits identified DNF System Suppliers’ Forum

3. The Problem • Questionable data integrity • Creating and maintaining spatial data continuously but not CONSISTENTLY since 1978 • GIS technologies encourage REPLICATION contributing to our current holding of 1.5 million spatial records • External factors such as LandLine annual refresh and PAI have moved the map beneath our data • Lack of metadata means we are unable to determine its fit-for-purpose status • for years strived to place GIS centric to how we manage our information but now find it gets in the way so need to move it to what it is good at, a facilitating role. DNF System Suppliers’ Forum

4. Why change • One option do nothing and continue to invest in the problem, manage risk and dream of retiring • Why we decided not to go with this option: • Wider dissemination of the information including Public Access make risk management less viable in that you do not know to what purpose it is being put • More automated business processes remove the opportunity for manual checking. Also, this type of behaviour would not be in line with Gershon thinking • Greater pressure for quality information to support informed and evidenced decision making • Need to “park” the map when it has nothing to contribute in order to: • communicate spatial relationships more through business critical access channels such as the “front office” • Make the spatial nature of the question transparent to lay users • Facilitate more flexible systems integration DNF System Suppliers’ Forum

5. Our Approach • Reviewed our experience of mainframe land and property systems and decided to re-adopt some elements of best practice such as: • Single centralised view of a property • Linked application data by association • Imposed business rules to protect the linkage • MasterMap gave us the opportunity to consider the migration of our digitised LPG extents to association with TOIDS • Migration Process to have 3 phases: • Residential, to give greatest return and likely to be easiest • Other addressable objects • Non-addressable objects • Unaware of DNF at the time but had a “you show me yours and I will show you mine” meeting with O.S. and discovered that our proposed approach was largely compliant with the principles of DNF DNF System Suppliers’ Forum

6. The Process DNF System Suppliers’ Forum

7. The results of work to-date DNF System Suppliers’ Forum

8. Failure Profile *sample consisted of 148 residential postcodes and 3515 LPG items (825 LPG failures) DNF System Suppliers’ Forum

9. Benefits • Opportunity to set up process to visit all data, clean and remove replicated records by cross-referencing • Introduces record level metadata enabling users to make judgements on whether data is fit for their purpose or not. • Enables support of meaningful data audit trails • Improved data capture; • linking to existing information where possible • faster, more accurate and consistent process for new capture • Reduces impact of data integrity erosion by offering a more effective means of managing change and retaining quality. • Establishes a G.I. Reference Engine DNF System Suppliers’ Forum

10. Thank you for your attention DNF System Suppliers’ Forum