I have gotten a fairly large polyline-dataset of GPS-recorded tracks. I'd like to have a sample along the tracks for different variables. The problem is that the data has overlapping tracks. This type of situation occures in example when same track has been walked (recorded) back and forth:
Points in the picture are 3 m apart from one another (measured along the polyline). As you can see, there are duplicate observations, which would corrupt my sample.
What is a convenient way of moving points (=observations) that are too close to each other and, most importantly, how do I keep one observation and delete the other?
I think I should clean the polyline data first and then take the sample, but I'm still figuring out how to do this.