DCDB National Workshop Sydney 2010 Geoscience Australia Utilising Digital Cadastre David Campbell National Geographic Information Group DCDB National Workshop Sydney 2010

DCDB National Workshop Sydney 2010 GA and the DCDB Digital Cadastre Data is utilised as a valued reference source across many project areas within Geoscience Australia. However, GA is neither a creator or maintainer of digital cadastre. Digital cadastre data is sourced from the States & Territories, and PSMA’s national dataset. Two GA project activities using the DCDB in different ways… National Geographic Information Group (NGIG) National Exposure Information Systems (NEXIS)

DCDB National Workshop Sydney 2010 The DCDB and Topographic Information The National Geographic Information Group (NGIG) utilises the DCDB as a valued contextual reference source in the gathering of topographic information. For example, the DCDB viewed over imagery provides context in such areas as… Recent land sub-division a pointer of new development and associated infrastructure activities Roads falling within road easements an indication of public versus private road Positioning of high voltage electricity transmission lines along easements Land tenure indication of land use Alignment of boundaries eg National Parks, Reserves, Fence lines

DCDB National Workshop Sydney 2010 National Topographic Initiative Commonwealth/State Collaboration Capture once, use many – sharing of information between State/Territory jurisdictions Enhanced positional accuracy and greater number of attributes stored in GA’s topographic database Different topographic specifications used across jurisdictions Cadastre assists in acquiring greater level of accuracy and attribute information when working with other data sources as part of topographic revision

DCDB National Workshop Sydney 2010 Cadastre and the National Exposure Information System (NEXIS) NEXIS Project Description….. NEXIS is being developed to provide consistent exposure information to support regional and national risk assessments of buildings and infrastructure to natural hazards. NEXIS was created in response to COAG reform Commitment 2 – “establish a nationally consistent system of data collection, research and analysis to ensure a sound knowledge base on natural disasters and disaster mitigation”, Geoscience Australia’s (GA’s) Risk & Impact Analysis Group is working on the development of the NEXIS. The DCDB is critically important for the part it plays in the NEXIS Project.

DCDB National Workshop Sydney 2010 ResidentialCommercialIndustrial Latitude Longitude Address Block size Footprint area Latitude Longitude Address Block size Footprint area Latitude Longitude Address Block size Footprint area Construction type Floor area Roof type Wall type Storeys Age Construction type Floor area Roof type Wall type Storeys Basement Car parks Age Construction type Floor area Roof type Wall type Age ANZSIC category No. Businesses Structural value ANZSIC category No. Businesses Structural value Income group No. Residences No. People Structural value Content value Structural Demographic/ Economic Spatial Information required by NEXIS

DCDB National Workshop Sydney 2010 Cadastre and the National Exposure Information System (NEXIS) – cont. NEXIS uses PSMA cadastre to calculate…. Type of building (SH, SD, etc) by number of GNAF and Cadastre parcel size Block size Foot print (needed to calculate building replacement value)

DCDB National Workshop Sydney 2010 Cadastre and the National Exposure Information System (NEXIS) – cont. NEXIS uses cadastre directly from the States to…. Calculate building age from the parcel registration date Extract tenure type Provide a contact to discuss queries & clarify issues

DCDB National Workshop Sydney 2010 Cadastre and the National Exposure Information System (NEXIS) – cont. NEXIS - Issues with the DCDB include…… Currency Inconsistency across jurisdictions Spatial and attribute errors found Lack of attributes in PSMA Cadastre Error reporting process – point of contact with the jurisdictions

DCDB National Workshop Sydney 2010 Conclusion: Cadastre is a valued reference source, supporting informed decision making across a number of GA project activities, which in turn allows for informed decision making by Government and non-Government alike in such areas as infrastructure, resource & emergency management.