Box Counting Method
schulzm at perm.geologie.uni-freiburg.de
Mon Sep 6 09:33:00 EDT 1999
Together with a diploma student, we are trying to use GRASS to
perform calculations with the Box Counting Method. The box method is used
here to measure the fractal dimension of the spatial and scaling
distribution of fractures.
A sequence of grids, each with a different cell size is placed over maps
of fracture traces and the number of cells intersected by the fractures
We used scanned maps of the fracture traces, imported them into GRASS and
tried to run r.reports on the same mapset with varying resolutions. this
did not work. We thought about using r.mapcalc to do some kind of
neighborhood analysis, but the problem seems to be the varying cell sizes.
Is it possible to use r.mapcalc within one location but different
resolutions of raster maps ? Could it be done with several locations (
r.mapcalc takes input from location 1 with res 1 and analyzes this grid
with neighborhood-sizes of location 2 with res 2 and writes the result to
location 2 ) ?
Any comments or ideas would be appreciated !
Christoph-Mang-Str.5 Geologisches Institut
79100 Freiburg Universitaet Freiburg
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