Segment direction histogram

Functionality

The Segment direction histogram operation calculates directions and lengths within segments, i.e. between all stored coordinates of the segments. The output is a table with directions from 0 to 179° and the length and number of the segment parts in that direction.

This operation can be used to analyze the pattern of lines (segments) in a segment map. To get information on, for instance, the structure and lithology of rocks, the direction, length, and frequencies of features such as faulting and jointing can be calculated.

Example:

When segments only consist of begin and end nodes without any intermediate points (see Fig. 1), directions and lengths will be calculated for the complete segments.

Usually however segments consist of a begin and end node and multiple intermediate points (see Fig. 2). Directions and lengths will then be calculated between all stored coordinates in the segments, i.e. for all segments from the begin node to the first intermediate point, from the first intermediate point to the second, etc., until the end node.

 

Fig. 1: Segments without intermediate points.

Fig. 2: Segments with intermediate points.

Input map requirements:

No special requirements for the input segment map.

Output table:

An output table with domain None is created.

The output table has three columns:

Tips:

Notes:

See also: