The National Elevation Data Framework

The National Elevation Data Framework Progress, Directions & Challenges Nerida Wilson (Phil Tickle & Chris Inskeep) Geoscience Australia

Common Framework Data Needs
Climate Change
Water Resources
Environmental and Natural Resource Management
Communications, Transport and urban/industrial infrastructure development
Emergency Management
A Digital Representation of Australia’s Landform and Seabed is fundamental to addressing these national priorities

Effects of different DEM types & resolutions 9 second DEM SRTM 3 sec DEM SRTM 1 sec DEM-H Regional 5 m Lidar 1 m

National Nested DEM Existing Regional DEMs ALOS, SPOT HRS and others Geodata 9 sec DEM SRTM (3 sec, 1 sec) Airborne IFSAR Ground Survey Existing contours spot height hydro-network data TanDEM-X (2009) LiDAR ?

NEDF Strategies (2009-2011)
Governance structures
Mechanisms for funding which promote cost sharing
Technical standards which maximise the utility and interoperability of data
Access, distribution and use arrangements
Industry development and capacity building
Vision: To ensure that decision makers, investors and the community have access to the best available elevation data describing Australia’s landforms and sea bed to address the needs of today and the decades ahead.

Investment in Elevation Data

The New National DEM
Being delivered through the BoM, CSIRO, GA, ANU “Geofabric” initiative.
Defence have released the 1 sec data for “government use” (Commonwealth, State, Local and regional NRM bodies) through GA.
4 core streams of activity under way
Mapped watercourses and water bodies.
DEM-derived watercourses
National Catchment Boundaries
1” SRTM-derived DEM development
National foundation products completed.
Investment in regional-scale data commenced
10 year road-map.
Canberra – 9 second DEM v3 Canberra – SRTM2-DSM

SRTM-2 (1 second) cleanup
A joint venture between CSIRO, BoM, GA, ANU
Fourier transform filtering to remove systematic stripes (sensor artifacts)
Removal of vegetation offsets
Identification of affected areas using vegetation mapping from remote sensing and direct detection from DEM
Measurement of vegetation height offset and construction of vegetation height surface
Removal of height offset in affected areas
Doesn’t work everywhere
Adaptive smoothing to reduce random height variations in flatter areas
Drainage enforcement with ANUDEM using mapped streams (national and regional scales)
Raw SRTM 1 sec hydro-conditioned SRTM DEM-H

The 1 sec National DEM – Current Status
4 th release of Version 1 released April, 2011
DSM, DEM, DEM-S and DEM-H products
DEM-S – smoothed
DEM-H – Hydro’ enforced
DEM-H currently enforced with 1:250K drainage
2011/12 enforcement will be undertaken using 1:25K-1:100K drainage following major investment through Geofabric initiative
In principle agreement reached with Defence to release 1 sec into “Public Domain” (pending formal approval)
Data available through NEDF-Portal
http:// nedf.ga.gov.au

Integration of LiDAR with SRTM SRTM-DSM SRTM-DEM LIDAR-DEM – 10m Brisbane

SRTM 1  contribution to catchment delineation 10 km shift in catchment boundary. 0 10 20 km 150 148 146 144

Urban DEM Project
Phase 1 of the NEDF implementation
Mapping key urban and industrial areas which may be subject to inundation due to the impacts of climate change or storm surge.
Developing an online web portal for public good data access.
Developing an online tool for government and public users to visualise the coastal inundation.
Managed by the CRCSI under contract to the Department of Climate Change with significant project and technical support from GA and ANZLIC.
Project outputs launched by the Minister for Climate Change and Energy Efficiency Dec, 2010.

UDEM Contributors

UDEM Project LiDAR Coverage

Tool for Visualising Sea Level Rise

Urban DEM Project Narrabeen Sydney - TIN Model of Hydrologically conditioned DEM

The NEDF Portal
A one stop elevation shop launched Dec 2010
ArcGIS server application delivering the functionality of GIS mapping tools in a web environment
Improving the management and maintenance of elevation and related data within GA and across government.
Access to million’s $ data
Data sharing amongst state/jurisdictions
Reduce duplication of data capture & purchasing costs
Ability to monitor who is using or benefits from the data
Reduce effort in distributing data & signing licences
Potential to identify gaps in elevation data around Australia & where future acquisitions should occur

http:// nedf.ga.gov.au NEDF Portal

TBs data to ingest
Data preparation
Metadata
Search extent & Rename Tools
Behind the NEDF Portal

Technical Standards ICSM Elevation Working Group
Terms of Reference
Develop technical guidelines and standards for the acquisition, processing and quality assurance of elevation data.
Develop generic best practice ‘Statements of Work’ that may be used by agencies in developing project deliverables.
Liaise with ICSM committees and other appropriate bodies to optimise alignment of activities.
Facilitate national awareness of guidelines, best practice and standards.
“ Future-Proofing” Our Collective Investment

Technical Standards http:// www.icsm.gov.au/icsm/elevation/index.html

Fit for Purpose? What DEM do I require?

Poor LiDAR Point Cloud Classification

A DEM Suitable for Coastal Modelling

Hydrologically Conditioned DEM

HDEM derived Innundation Contours

Non-Conditioned DEM

The Difference

So what next.....?

UDEM Phase 2 (June 2010-2012)
Expanding the coverage of elevation data available for public good use to support the communication of inundation risk areas.
Promoting a consistent approach to developing risk profiles for coastal communities, through developing products and tools communicating inundation risk.
Providing additional capacity for local governments and other coastal decision makers to identify risk.
Increasing information in the public domain to assist in raising community awareness.
Supporting the development of a nationally coordinated, distributed approach to manage elevation data underpinned by standards and guidelines to ensure quality of elevation products.
Addressing priority research issues to improve the technical capacity and usage of elevation data.

UDEM Phase 2 (2010-2012)
Work in progress
New data acquisition over priority areas (expanded LiDAR and imagery coverage focusing on key regional centres)
Hydrological conditioning of acquired data in selected areas to underpin accurate modelling
Expansion of NEDF-Portal capacity and capabilities
Extending the coverage and enhancement of the visualisation tool and static maps
Further research to address key technical capacity constraints.

2011 Audit of High Resolution Coastal Elevation Data

Audit of High Resolution Coastal Elevation Data

UDEM Phase 2 Research Projects
Project 1 – Performance of DEM generation technologies in coastal environments
Project 2 – Integration of multi-resolution DEMs
Project 3 – Vertical datum harmonisation across the littoral zone
Project 4 - User requirements for bathymetric data collection
Project 5 – The need for hydrological conditioning of DEMs

NEDF-Portal Roadmap
Federation of the Capabilities
Instance of the Portal implemented in NSW LPMA. Discussions with other agencies
Portal capabilities not only provide discovery and access, but just as importantly, improved data management at agency level
Current enhancements being implemented
Support for alternative gridded data and image formats
Enhancements to metadata entry tools
Support for a “federated” inter-agency catalogue that links the two Portals
Support for a “Register of Interest” function enabling users to declare their interest in acquiring data over specific regions. This will be used to target investment and create funding consortiums
Support for a “Register of Intent” function to enable agencies to expose proposed data acquisitions to avoid duplication.

NEDF-Portal Roadmap
Proposed Development
Custom metadata catalogue metadata schemas to allow ingestion of a wider range of agency schema in addition to core elements in the ANZLIC profile of ISO 19115
Distributed metadata repositories and dynamic search interface
Modularising of the geo-processing interface to allow ‘plug-in’ capabilities provided by a wider range of COTS and Open Source applications
Improved scheduling and throughput of geoprocessing jobs by better utilisation of multi-core and parallel computing environments
Automation interface via web services
Further extension into GA core business systems for data delivery
Further federation of the capabilities in collaboration with Commonwealth and State agencies.

If only….

More Information…. Contact: Nerida Wilson 02 6249 9254 Email: [email_address] NEDF-Portal: http:// nedf.ga.gov.au GA website: http://www.ga.gov.au/topographic-mapping/digital-elevation-data.html

The National Elevation Data Framework

by fungis on Jun 21, 2011

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The National Elevation Data Framework — Presentation Transcript