I'm looking for a visualisation method that enables me to represent bimodal or even multimodal attribute value distributions on line features.
A bimodal distribution has two different modes that appear as distinct peaks in the probability density function (image #1). Mean, median and standard deviation values are of little use to describe such data.
#1 Example of a bimodal distribution:
My use case is the following: For all road links in a network, I have associated speed measurements (many hundreds per link) in bimodal - sometimes multimodal (three modes) - distributions. Now, I'm looking for a way to visualize this data on a map.
Besides attaching a bar diagram to each link, I haven't found any way to achieve my goal using a GIS. The visualisation results should be printable so animations won't do.
#2 Example visualisation using diagrams:
All ideas welcome!