google maps middle of a polyline (centroid?)

Question

I have a list of polylines, just like google maps does when I click on the polyline I want an infowindow to show up just where I clicked, and it works just fine with this fu

Answer 1

So firstly you need to use the geometry library which calculates distances. Add libraries=geometry to your JS call, e.g.

Assuming you know the start point and end point for your polyline, you should be able to do this:

var inBetween = google.maps.geometry.spherical.interpolate(startLatlng, endLatlng, 0.5);  
infowindow.position = inBetween;

I guess if you don't already know the start and end points, you could work it out from polyline.getPath().