Similar to the Google Earth elevation profile tool, also similar to this:
I want to be able to use my own set of contours to generate the profile so it is highly accurate. I'm not sure whether it's easier to build from scratch or try to customize an existing application?
I also want to have the funcionality of the slider that shows the user the elevation when they mouse over the path.
From my understanding Google Earth uses SRTM data which has a +- 30m accuracy.... not good enough for my purposes. Any thoughts?