Topographic parameters forAustraliaPresentation by Dr John Gallant and Jenet Austin (CSIRO)
Topographic links with landscape patterns
Links in the prediction chain Digitalelevation   Topographic model      parameters               (terrain                 ...
Topographic parameters•  Slope, aspect, curvature•  Relief•  Slope/relief classification•  MrVBF valley bottom flatness in...
9 second to 1 second DEM: 250 m to 30 m
1 second DEM• Removed stripes and filled voids• Removed tree offsets and noise• Enforced drainage
Carnarvon Range, Qld    10 km
Slope0   50%
Topographic wetness index (TWI) 3     13
MrVBF: Multi-resolution valley bottom           flatness index  0     6
MrRTF: Multi-resolution ridge top flatness                 index    0      6
Topographic position index (TPI)  3 top  2 middle   masked  1 bottom
Slope-Relief classification                                       0 9 30 90 150 300m                                      ...
Solar radiation: incoming shortwaveWinter                          Summer   0     10 MJ/m2/day   50 km            10   20 ...
Solar radiation: incoming shortwaveWinter                         Summer   0     10 MJ/m2/day                   10   20 MJ...
Where is the data?• Discoverable through the TERN Data Discovery Portal   http://portal.tern.org.au• Visible through TERN ...
Thank youCSIRO Land and WaterDr John Gallant                    Jenet AustinTerrain Analysis Team Leader       Spatial Ana...
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John Gallant_Topographic parameters for Australia

  1. 1. Topographic parameters forAustraliaPresentation by Dr John Gallant and Jenet Austin (CSIRO)
  2. 2. Topographic links with landscape patterns
  3. 3. Links in the prediction chain Digitalelevation Topographic model parameters (terrain Predictive covariates) models Species distribution Soil properties
  4. 4. Topographic parameters• Slope, aspect, curvature• Relief• Slope/relief classification• MrVBF valley bottom flatness index• Topographic position index• Topographic wetness index (TWI or CTI)• Solar radiationAll derived from a suitable digital elevation model (DEM)
  5. 5. 9 second to 1 second DEM: 250 m to 30 m
  6. 6. 1 second DEM• Removed stripes and filled voids• Removed tree offsets and noise• Enforced drainage
  7. 7. Carnarvon Range, Qld 10 km
  8. 8. Slope0 50%
  9. 9. Topographic wetness index (TWI) 3 13
  10. 10. MrVBF: Multi-resolution valley bottom flatness index 0 6
  11. 11. MrRTF: Multi-resolution ridge top flatness index 0 6
  12. 12. Topographic position index (TPI) 3 top 2 middle masked 1 bottom
  13. 13. Slope-Relief classification 0 9 30 90 150 300m P R L H H M Relief LE VG GE MO ST VS 0 1 3 10 32 56% Slope
  14. 14. Solar radiation: incoming shortwaveWinter Summer 0 10 MJ/m2/day 50 km 10 20 MJ/m2/day
  15. 15. Solar radiation: incoming shortwaveWinter Summer 0 10 MJ/m2/day 10 20 MJ/m2/day 5 km
  16. 16. Where is the data?• Discoverable through the TERN Data Discovery Portal http://portal.tern.org.au• Visible through TERN Soil Portal http ://www.asris.csiro.au/viewer/tern• Downloadable from CSIRO Data Access Portal http://data.csiro.au/dap• Solar radiation nearing completion• Products are at 3″ resolution – Derived from 1″ DEM and generalised – 1″ resolution exist, working out how to distribute
  17. 17. Thank youCSIRO Land and WaterDr John Gallant Jenet AustinTerrain Analysis Team Leader Spatial Analystt +61 2 6246 5734 t +61 2 6246 5707e john.gallant@csiro.au e Jenet.Austin@csiro.auw www.csiro.au/John.Gallant.html w www.csiro.au/Jenet.Austin.html

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