I present a new release (vers. 0.1.1) of a Python application that calculates the theoretical intersections between a plane and a DEM (in a raster format). This application could be useful in geological investigations, i.e., for comparing structural measures of geological surfaces with their mapped (or yet to map) topographic traces.
When we define a plane attitude by its dip direction and angle, as well as by a single point point lying in the plane, we can analytically determine the intersection points between these two surfaces.
The theoretical basis of the algorithm are described in the post (in Italian): Intersezioni tra DEM e superfici planari, un tema di interesse in geologia. A case study is presented in:
gSurf: una applicazione Python per calcolare interattivamente l'intersezione fra piani e DEM.
gSurf: una applicazione Python per calcolare interattivamente l'intersezione fra piani e DEM.
This application allows to save the computed intersections as a point shapefile, for further processing in GIS software, and also images of the map.
A screen shot of the application is below.
To run this program, the following Python modules are required:
- numpy
- gdal
- PyQt4
- matplotlib
It has been tested on Windows Vista and Ubuntu Lucid Lynx.
It can be downloaded from the link gSurf: a Python program for the interactive determination of intersections between DEM and planes, where additional information is also available.
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