Spatial@gov conference 2011 john gallant

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  • 1. The national hydrological one-seconddigital elevation modelDr John GallantA water information R & D alliance between the Bureau of Meteorology andCSIRO’s Water for a Healthy Country Flagship
  • 2. 9 second to 1 second: Barcoo and Thomson 20 km
  • 3. SRTM and 1 second national DEM NGA1″ data DIGO BoM GA ANUNASA SRTM CSIROCapture Feb 2000Release 2005Public release at 3″ DSM DEM DEM-S DEM-H GA Public release at 1″ Public release at 3″
  • 4. SRTM: Global elevation dataImage courtesy NASA/JPL-Caltech
  • 5. Haddon Corner, northeast SA and southwest Qld 10 km
  • 6. Lachlan River below Cowra, NSW 10 km
  • 7. The overland track, Tasmania 10 km
  • 8. SRTM
  • 9. SRTMdestriped
  • 10. DSM
  • 11. DEM
  • 12. DEM-S
  • 13. DEM-H
  • 14. SRTM
  • 15. Streamlines adjusted to match DEM Mapped – retained Mapped – removed New lines from DEM
  • 16. 1 second national DEM products 2000 1 second SRTM 2005 Destripe, void fill2008 1 second DSM v1.0 3 second DSM v1.0 9 second DSM v1.0 Remove tree offsets 2009 1 second DEM v1.0 3 second DEM v1.0 9 second DEM v1.0 Adaptive smoothing2010 1 second DEM-S v1.0 3 second DEM-S v1.0 9 second DEM-S v1.0 Drainage enforcement Drainage enforcement2011 1 second DEM-H v1.0 3 second DEM-H v1.0 9 second DEM-H v1.0
  • 17. Depressions: lower Darling, NSW 90 m 50 m 20 km
  • 18. Implications for the Geofabric:Hydrological features, changes in catchment boundaries
  • 19. Taking Australian technology to the world• Improve the quality of the global SRTM data • Collaboration with NASA in development • Removing stripes, treating tree offsets, reducing noise • Drainage enforcement? Needs good stream line data • Combining with improved ASTER G-DEM• Accessible high quality terrain data and derived products for the globe
  • 20. Ongoing improvement of Australian DEM• Improved hydrological enforcement with finer scale source data• Better DEM source data • Lidar • IFSAR • Photogrammetry• How much better do we need? • Coasts and floodplains need better vertical accuracy for inundation modelling
  • 21. Finer scale stream lines
  • 22. Murray floodplain, Yarrawonga: Original SRTM data 150 110 2 km
  • 23. Murray floodplain, Yarrawonga: DEM-H 150 110 2 km
  • 24. Murray floodplain, Yarrawonga: DEM-H and lidar 150 110 2 km
  • 25. still the best data over most of Australia 10 km
  • 26. Access to 1 second DEM• Search: Australian one second dem • www.ga.gov.au/topographic-mapping/digital-elevation-data.html• nedf.ga.gov.au
  • 27. CSIRO Land and WaterJohn Gallant DIGOTerrain Analysis Team Leader Jim CrouchPhone: +61 2 6246 5734Email: John.Gallant@csiro.au ANUWeb: www.csiro.au/science/Soil-and-Landscape-Science Mike Hutchinsonwww.csiro.au/people/John.Gallant.html Janet SteinCLW team BoM Geoscience AustraliaArthur Read Elizabeth McDonald Phil Tickle Shane CrossmanTrevor Dowling Darren Smith Nerida Wilson Katherine GreenJen Austin Malcolm Parnell Chris Pietrucha Rohan JacobsonLinda Gregory Matt Brooks Sarah Corrigan Megan McCabeAlan Marks Dovey Dee Chris Inskeep Mark von BehrensDavid LemonThank you Contact Us Phone: 1300 363 400 or +61 3 9545 2176 Email: Enquiries@csiro.au Web: www.csiro.au