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BjornNyberg / NetworkGT

The NetworkGT (Network Geometry and Topology) Toolbox is a set of tools designed for the geometrical and topological analysis of fracture networks.
GNU General Public License v3.0
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Rose plot orientation calculation #8

Closed nialov closed 4 years ago

nialov commented 4 years ago

I'm having some trouble understanding the orientation calculation for rose plotting in NetworkGT. As I've understood it calculates every angle between adjacent points in a LineString and uses the average of these angles to determine the final orientation of a single LineString. But if the lengths of each part of a LineString differ this would not result in the right solution.

I've provided a Jupyter notebook with my testing to illustrate the problem:

Notebook

A vectorial approach as I understand it is to simply take the start and end points of a LineString and calculate the orientation of the line between the start and end points.

BjornNyberg commented 4 years ago

Thanks for noticing this @nialov . A fix is about to be implemented in the release of the next version. Temporary fix: inlcude a continue statement after the startx,starty = point line and remove the if bearing >= 180: bearing -= 180 statement.

Note as you say this will not account for different lengths of each line segment. This is also added corrected for in the next release