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

"THATíS ALL FOLKS!"