Improve walking time calculations

[Tanner]

From what I read in the generate_distance_matrix.py the walking times are using the same route that the buses make when they are driving around campus.

This makes walking times very unrealistic if the bus stops are across campus (e.g. 8thhemp and ferstcher).

I propose that the walking code should take this into account.

The implementation should be pretty simple (A*), but the tedious part is finding all the points for all sidewalks on Tech. There was a website someone posted on /r/gatech that did exactly this (walking route finding at Tech), but I can't find it. If we used those points, it would make lives easier.

Pros:

• More accurate walking times
• Walking times can take into account the huge puddles that happen across campus

Cons:

• Users may not take the "optimal" walking paths (can be fixed by taking the average of the x best unique paths)

[blueintegral]

Actually, Google takes care of finding the shortest path that it deems walkable (ie, is on sidewalks). Here's a path it calculated for driving from Klaus to the Student Center: http://goo.gl/maps/WNDW1 And here's the path it uses when changing the transportation mode to walking: http://goo.gl/maps/FW3o2

[Tanner]

Ah, you're right. I forgot about that. Disregard.