pedbike

Slope + Speed + Distance + Impedance = Travel Time

Discussion created by pedbike on Aug 11, 2011
Latest reply on Aug 16, 2011 by jborgion
Hi.

I am trying to calculate a shortest path based on travel time through my pedestrian and bicycle network.

However, I want to incorporate:  slope, travel speed, distance, pedestrian impedance (sidewalks), and bicycle impedance (safest route) into an equation to help calculate travel time through the network.

I'm thinking that the easiest thing to do is create an equation in the  Field Calculator that incorporates these variables and populate a new field (Travel time).

I was thinking about modifying Tobler's equation http://mapaspects.org/courses/gis-and-anthropology/workshop-2009-viewshed-and-cost-distance/ii-cost-distance-2009

Just not sure exactly how to formulate the equation? Any thoughts?

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