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