GRIDS Version
1.0:
Digital Elevation Model processing
Chipro Research Cluster Meeting Talk
2005-02-09
Andy Turner
Outline
1. Introduction
Mediterranean SRTM data
Slide 5
Global SRTM data
Future DEMs
Personal priorities
Mediterranean SRTM data
processing
2. GRIDS 1.0
Overview
core
(Theoretical) Limitations
Chunks?
Different types of Chunk
64CellMap (1/2)
64CellMap (2/2)
Map type chunks in
general
Factories and Iterators
Statistics (1/3)
Statistics (2/3)
Statistics (3/3)
Memory handling
Memory handling special
cases
process
GWS extension
DEM extension
3. Example outputs
A basic metric
Slope and Aspect
Slope 2
Slope 4
Slope 8
Slope 16
Aspect 2
Aspect 4
Aspect 8
Aspect 16
Distance weighting again
Scale again
Upness
Downness
Composite slopyness
Recall Equidistant
orthogonal comparisons
Rotation invariant
metrics
Considerations
Example 1:
w_hhll
Example 2:
mind_hhhh
Example 3:
maxd_llll
Example
4:
sumd_abs_xlxh_ai_lllh
Axis based metrics
Considerations
4. Further work
"THAT’S ALL FOLKS!"