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For a landscape analysis study, I want to extract some categorical data along a line (purple in the image) on the selected area. Before I continue to create an entire plugin to create a categorical "profile", maybe it has already been done. I will explain the situation below.

the selected area outlined in blue with the profile line in purple projected over the information in the vector-layer

Along this line I can already obtain a height profile (via elevation profile or profile tool), but would like to add "profiles" of categorical data (from a vector-layer with polygons), as horizontal bars below the height profile.

example of a categorical data "profile" below a height profile as extracted from the shown vector-data

In order to produce these bars, I already took steps to find the positions of intersections for a vector layer using Vector -> Geometry Tools -> Polygons to Lines followed by Vector -> Analysis Tools -> Line Intersections. It would then be possible to write some code to determine which polygon/category is covered in which part of the profile, but maybe someone has already done this.

the selected area where the polygons have been reduced to lines, and the intersections with the profile-line shown

Before I continue to create an entire plugin to make these charts:

  1. What would you name such a categorical "profile"?
  2. Is a plugin for creating these already available?
Vince
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