The Western Australian MarineScience Institution [WAMSI]

Presentation to the WALIS Marine Group – NEDF

Workshop Report 28 March 2008

Steve Blake

The story so far

NEDF Concept;

2006/07 User/ Stakeholder Meetings;

Audit, Science Case, Business Case, Background Papers;

NEDF Workshop – Canberra, 18 Mar 2008

Workshop Report

By invitation only workshop;

G. Searle, S. Blake & W. Featherstone attended from WA;

Very professionally put together & sponsored by The Australian Academy of Science with senior representation

Workshop Report

Clear user-requirement[s] esp. the + 20 m coastal regions;

No new $$; no articulated priority regions;

Environment for governance & coordination as the main focus of effort

Workshop Report

Attention of key decision makers;

Do need a seamless DEM – nested product;

Future upgrade/ maintenance path required

Workshop Report

900 separate elevation datasets across Govt alone & more in private sector;

Most project driven;

Diverse, no consistency in specification

Workshop Report

ASIBA interest;

Prof Clive Fraser’s talk – excellent technical reference [need to source a copy];

Three scales: sub-metre, 1-2 m & 5-15 m

Workshop Report

DSM – DEM conversion can be costly;

Horizontal Datum – not an issue;

Vertical Datum – “the” issue

Workshop Report

Other main issue: the interface between bathymetry [tidal datum] & land elevation;

LIDAR stats: DSM’s at 10 -30cm res = $150 - $350 km2 [assuming a 1 km swath];

But DSM – DEM costs still high

Workshop Report

LADS: up to 60m water depth but problematic in turbid/ surf zone;

Quickbird satellite: 2-3m DSM’s routine

SPOT 5 HRS: being captured for whole continent [AGO Project]

Workshop Report

Future = High frequency LIDAR – can fly higher – cheaper cost per unit area;

AHD – can be revised now [40 yrs of data that can be applied]

WA tilt = 0.4 m caused by sea surface topography

Workshop Report

Large volumes of data – proprietary storage formats;

LIDAR – largest current investment:- 15 cm highest res- 50 cm lowest res

AHD = OK as base datum

Workshop Report

Importance of “repeatability” around key locations around Australia;

ie. temporal aspect as well as 3-D aspect

Brokering point, LIDAR specifications etc to reduce transaction costs??

Workshop Report - Summary

Good background documents prepared;

Some good technical summary PPT’s;

No agreed way forward – in terms of governance & coordination in short term;

No cashed-up client??