translating map fragments - plate-tectonics using GRASS???
S.Cox at solo.ned.dem.csiro.au
Mon Oct 14 08:00:00 EDT 1996
I want to do some broad-scale tectonic modelling which involves
moving chunks of maps around using translations and rotations.
Since the maps come in various flavours and involve various
attributes, I thought it would be best to use a GIS to manage them.
So, I'm thinking of doing a bit of programming to move (initially)
vector polygons around maps - v.move or some-such. If this works,
I'll think about using these to mask bits of rasters, then jump
through the reprojection hoops to get the right answers.
However, since the scales are so broad (large fractions of
Australia) I need to worry about the curvature of the earth
in order to preserve areas, scales, etc. Probably a simple
spherical earth would be good enough to start with.
I realise that this all involves spherical geometry, euler poles,
etc, stuff which is well known to tectonicians. Many goes have
been made at producing code to do all of this tuff, but
unfortunately all the bits that I am aware of reside in
proprietary packages, only available in compiled form,
so are unavailable to act as the basis for incorporation.
I wonder if anyone out there has looked into this problem,
or could offer any advice?
Dr Simon Cox - Australian Geodynamics Cooperative Research Centre
CSIRO Exploration & Mining, PO Box 437, Nedlands, WA 6009 Australia
T: +61 9 389 8421 F: +61 9 389 1906 simon at ned.dem.csiro.au
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