3. Links in the prediction chain
Digital
elevation Topographic
model parameters
(terrain
Predictive
covariates)
models Species distribution
Soil properties
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 radiation
All derived from a suitable digital elevation model (DEM)
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. Thank you
CSIRO Land and Water
Dr John Gallant Jenet Austin
Terrain Analysis Team Leader Spatial Analyst
t +61 2 6246 5734 t +61 2 6246 5707
e john.gallant@csiro.au e Jenet.Austin@csiro.au
w www.csiro.au/John.Gallant.html w www.csiro.au/Jenet.Austin.html