how to draw symmetrical line to the polygon?

Question

I have a road polygon that I need to divide in given lanes. So I get a JTS geometry of roads from shapefile and I need to create lines or basically create a geometry lines (lanes) within that polygon. Something like this

The more complex scenarios are when roads are not straight for e.g.

So I need to create lanes within that polygon as the polygon lines go. Is it possible to get those lane/line geometries using JTS geometry functions?

user_439194 · Answer

TL;DR; no.

I wrote a blog entry a while ago about how to add "CenterLines" to polygons and it was not nearly as easy as I expected. That code may be enough to get you started. Feel free to ask for advice on the GeoTools users list.

how to draw symmetrical line to the polygon?

1 Answers