I'd like to analyse navigational accuracy, comparing planned transects with the actual track flown from GPS data.
For example, the planned transects below (green) don't match perfectly with the actual flown (blue) - for the areas adjacent to the transects, what is the average error (distance), IGNORING the bits beyond the ends of each transect?
The planned transects are lines, typically only with start and end nodes. The tracks are from GPX files and may be made of many, many nodes - but may only have a few nodes recorded when the aircraft is flying particularly straight.
I'd like to use QGIS. One thought was to use the v.to.points tool from GRASS in the Processing toolbox to split each transect into points of, say, 50m spacing, and determine the nearest distance to the track for each point (then average them).
Is there, perhaps, a better way of calculating average distance than splitting the lines into individual points?