Victorian Spatial Showcase

Hosted by Strategic Land Assessment and InformationTuesday 10 December | State Library Victoria

Modernising Victoria’s digital cadastreDr Roger FraserChief Geospatial Scientist, VictoriaStrategic Land Assessment & Information | Land Use Victoria Department of Environment, Land, Water and Planning

What’s in a digital cadastre?

Graphical representation of property boundaries

A ‘property index’

Created in 1990s

Updated via development and subdivision activity

Spatial accuracy is poor in many areas of the state

Less than 4% parcels meet user spatial accuracy requirements

Drivers for change

Source: Fibre Optic Association, United States

Many hidden ‘costs’ arise from poor spatial accuracy

Regulatory compliance gaps, poor decision-making, reputational risk . . .

Inaccuracy impedes planning and stifles development

Update processes: non-digital, highly inefficient, duplicate effort

Background and current status

2011• Business Case to upgrade spatial

accuracy released

2016-2017• Pilot study to assess practical

feasibility of 2011 Business Case

2017• Revised Business Case prepared• $45M (3-year) DCM project

approved

2018• Procurement and commencement

of back capture

2019• Procurement of adjustment,

integration and maintenance• Stakeholder engagement begins

2020• Staged adjustment and

integration begin• Transformation activities begin

2022• DCM Project completes• 3D Cadastre begins

The cadastral system

Positioning framework

(datum)

Land registration system

Land planning system

Land valuation system

Digital cadastre Instruments

defining land

Delivery and access

of information

Legal framework

Survey marks and physical

evidence

Licensed Surveyors

Surveying standards

Cadastral plans and surveys

Stage IBack Capture

Stage IIAdjustment

Stage IIIIntegration

Stage IVAutomation

Scope of the DCM Project

Data from cadastral plans and surveys

captured, checked and stored in digital format

Digital cadastre‘fabric’ rigorously calculated from back-captured

data; Uncertainty calculated and

verified

Updated digital cadastre published; Changes in location cascaded through Vicmap products

Development of automated processes to

keep the digital cadastre and Vicmap

up to date

Back capture

Capture of ‘essential’ information from survey records spanning 150 years in a consistent digital format

Back capture schedule (2019-2021)

Least squares adjustment

back-captured data verified

digital cadastre parcels rigorously estimated from back-captured

data

Cadastral issues to be addressed:• rounding, gross errors• variation in age of survey• absence of cadastral data• hiatus• . . . Corrections and uncertainties

Outcomes and deliverables

IntegrationVicmapTM

Victoria’s core spatial dataset

VicmapTM productsupdated to reflect changes in the digital cadastre

TRANSPORT

HYDRO

ADDRESS

CROWN LAND

PROPERTY

FEATURES

BOUNDARIES

Automation – a digital workflow for updates

Validation of data; Update proposed layer;

Registration of title & ePlan; Archive ePlan

Adjustment and verification of digital cadastre; generate

corrections grid

Vicmap productsupdated to reflect

changes in the digital cadastre

Surveyor retrieves the digital cadastre;

undertakes survey; prepares plan; submitsePlan (plan and survey)

Update

Upg

rade

Adju

stm

ent

Back capture

Integration

Vicmap productsupdated to reflect

changes in the digital cadastre

Automation

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