Clearing the map is kind of annoying since it reloads the page yet I can clear the markers by clicking clear last marker multiple times without the page reloadi

Clearing the map is kind of annoying since it reloads the page yet I can clear the markers by clicking clear last marker multiple times without the page reloading. Plus the clear option resets my map selection and I really only want to clear the markers. I'd like to be able to draw my route with the mouse. The elevation chart is nice. How about an estimated travel time? How come the elevation limits are different for terrain and the others? Nice page. Goes in my Interesting Sites folder.