Victorian Update CGSIC July 2006 Peter Ramm

Outline Introduction Current Status Current Issues Future

Introduction

Victoria Area < 3% of Australia Population 24.9 % of Australia)

2004 CGSIC Report 21 Sep 2004 Long Beach Issues –Policy Framework –Location Based Services Project –Implications for Victoria Realisation of the datum Reg 13

Current Status

Policy Framework Continues to be important –Provides the policy context for positioning infrastructure –Within Policy, positioning is becoming more important Facilitates other activities Exposes quality issue in other spatial DB Coordination of infrastructure

LBS Planned to have about 0.5 m accuracy real time solution over Vic –Delivered Dec 2004

Implications For Vic For all practical purposes GPSnet is the realisation of the geodetic datum in Vic Now have Reg 13 Certificates on 18 Base Stations

Victorian GPS Base Station Network

Comparison Sep 2004Jul 2006 Number of Base Stations1924 (5 more scheduled for installation in next year) RTK (single Base)7 Radio only19 All Internet 7 Radio still DGPS (Sub Metre)PlannedEstablished and State Wide Networked RTK (2 cm)None8

Current Issues

Networks solutions not quite there –Inter Station Distance too small –Poor understanding of how they work –Low sat numbers a problem at times Driving changes in spatial data –Increased spatial accuracy in mapping Coordination Multiple software systems on the one network Hardware Costs down, but operators still have high costs CRC SI NCRIS

The Future

State wide Real time 2-3 cm Horiz Accuracy 3-5 cm Vertical Accuracy

Relevant papers (Vic Priorities) Denham et al Contemporary Position and Navigation Needs of Precision Agriculture and Victoria’s GPSnet CORS Network Gordini et al Testing and Evaluation of a GPS VCORS Network for Real Time Centimetric Positioning – The Victorian GPSnet Hale et al validating a Model For CORS Network Management Yousufi et al Temporal variations of the Victoria GPSnet Base Stations Zhang et al Sparse or Dense: Challenges of Australian Network RTK Timeframes a problem

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