1. What is SRTM?
Definitions of SRTM on the Web:
•The Shuttle Radar Topography Mission (SRTM) is an international
research effort that obtained digital elevation models on a near-
global scale from ... en.wikipedia.org/wiki/SRTM
•A NASA Space Shuttle mission that used C-band and X-band
interferometric synthetic aperture radars (IFSARs) to acquire
topographic data over 80 ...
5. How can you use SRTM?
•Mapping current geomorphology
•Mapping lineaments and other structural features
•Landsat shows surface variations while SRTM has a
penetration depth – ie reveals subsurface
information useful for structural interpretations
•Spatial Analyst (ESRI) can be used to creat
hillshades of the data as shown on following slides
SRTM can be used in
combination with other
to reveal variations in
/ processes with time.
An example of this is
detecting changes in
drainage channel patterns
with time – which is NB
When considering alluvial
10. Older paleochannel course (red
vectors from aeromagentics data)
More recent paleochannel
(from SRTM greyscale
Comparing recent drainage with
paleodrainage from geophysics data
18. A closer look at using multiple datasets for exploration
•Geological problems are often regional in nature
There are many gaps in detailed geological mapping
Remote sensing techniques provide a way to bridge
GIS facilitates this process immensely
19. A closer look at using multiple datasets for exploration
In the following example we see how regional
aeromagnetic data is used in a regional study to trace
the trail of a geological unit of interest.
Data from historical studies, digital geological data,
structural and other geophysical data sets are all
analyzed together in an attempt to define the unit
across country boundaries.
29. Can one link the trends back to the most likely
continuation of the unit?
30. More on Aeromagnetic data
•Ring features are sometimes viewed on
aeromagnetic / Landsat datasets
•These maybe associated with radial dykes /
intrusives or impact craters
•Both provide an potential area of interest for
•In the following example we see how such
features may appear on the imagery