DCDB WorkshopACT
Rene de Kiefte & Ron Jarman
Surveying & Spatial Data
Outline
• Unique features of ACT system
• Critical elements of DCDB
• Database process
• DA / EDP approval
• Data format & database updates
• Issues
• Challenges
Unique features of ACT system
• Small jurisdiction
• Relatively young
• Land tenure - Leasehold
• Planned City
• Self Government (1989)
• Surveyor-General’s office
Critical Elements• Single source of data
• Completeness, currency, accuracy
• Lifecycle stage of parcels
• Mathematical model
• Surveyors peg dcdb
• ACTMAPi is effectively ‘live’
Database Process
• Intergraph Geomedia with Oracle DB• Planning approval by ACTPLA –
advantage of being in-house• Estate Development Plan (EDP) • Development Application (DA)• Data format• ACTMAPi
DA/EDP Approval
• Governments Land release program• EDP circulated to agencies and may
involve several rounds of comments/corrections
• Approves section/block and road layout• Survey control adequate for development • Starts the Nomenclature process
- trigger for researching street names
Data Format
• CAD Drawings (Autocad 2009 dwg or earlier)
• Stromlo Grid
• New/changed data needs to be supplied with some existing surrounding data
• Sections, blocks, road centrelines, kerbs, islands, driveways
Data Format (continued)
• Use the layer naming specified• SECTION, SECTION_TXT• BLOCK, BLOCK_TXT• EASEMENT, EASEMENT_TXT• CENTRELINE, KERB_NEW,
DRIVEWAY,CARPARK• Comp sheets for Green fields• Diagram showing new boundaries
Database Updated
• Sections/Blocks added using survey data – checked against dimensions & area from supplied comp sheet/diagram
• Road data – Road names are Gazetted, centreline, kerbs, road polygon and name added
• Addresses added
Advantages of the system
• Data is available to builders, developers, suppliers and the public well in advance of any development
• Addresses available to Real Estate agents and the public
• Data for emergency services while construction under way
Follow on (once database is updated)
• Survey plan may be lodged for examination once blocks created in database
• Road opening/closure gazettal initiated • DP registration• Approved blocks are changed to
Registered, Easements and Footprints are added.
• Lease registration
Issues• DCDB - mathematical model draped over
geodetic network• Not an observational database • Level of maturity of cadastre
– Graphical cadastre– Upgraded graphical cadastre– Survey accurate cadastre– Reinstated cadastre– Legal cadastre
Challenges
• Resources– Funding & people
• Customers expectations– Increased technology
• 3D cadastre– Presentation / visualization
• ePlan development (we’ll be looking to beg, borrow or
steal from the larger jurisdictions –particularly from NSW)
Questions?
More Information
• ACTPLA Website has links to ACTMAPi and Digital Data standards
• http://www.actmapi.act.gov.au/
• http://www.actpla.act.gov.au/__data/assets/pdf_file/0003/6384/Digital_Data_Standards.pdf