First really thank for your work and excuse me for my bad english.
I try to split a LineString in two LineString.
I have a point (i named PointA) on this LineString (but not in LineString Vertice Array) and i would create 2 LineString , the end of the first and the begining of the second is the PointA.
In first i try to get the first Vertices of the LineString near the PointA (with low distance) but i can't know if is before or after the PointA ....
Have you an idea to do this very thanks.