need help calculating point between two coordinates.
davea at ieee.org
Fri Aug 14 02:06:56 CEST 2009
> Hi there
> I'am working on a route comparison tool for carpools.
> The route comparison is based on 'steps' retrieved from google maps
> GDirection. These steps vary in length and i use the coordinates at
> the beginning of each "step". However, sometimes the distance of these
> steps is too long(ex. driving 30-40 km. on the freeway). Therefore i
> would like to calculate/find the coordinate located in between two
> given coordinates.
> Lets say one step starts at:
> and ends at:
> I would then like to calculate the point right in the middle of these
> I use the haversine form to calculate the distance between
> coordinates, but im not sure whether or not this can be used for the
> same purpose.
> http://www.mpi.nl/world/persons/private ... versine.py
> I apologize if this thread has been posted the wrong place:)
> any help is greatly appreciated!
> kind regards.
For the distances you're talking about, those coordinates are very close
to linear. So to find the midpoint, just average the coordinates. You
might be off by half a km, but roads bend more than that.
More information about the Python-list