Five results: I spent time proving splines don't help trajectory databases

If you work with GPS tracks, this idea shows up sooner or later: why store a trajectory as a polyline of thousands of points when a vehicle moves smoothly? Accelerate, turn, brake — that's a smooth curve. A cubic B-spline describes it naturally; a polyline only approximates it with straight segments and kinks. The idea then develops on its own. A... Weiterlesen