# How to calculate slope direction in Network?

Question asked by Andy_91 on Mar 10, 2015
Latest reply on Mar 10, 2015 by GKishor

Hi!

My goal is to calculate the fastest biking rout to school with network analyst. In the calculation I want to also include the cost of biking up/down a slope.

I think I have all the necessary information for each road segment

- Slope

- Z values

- A constant speed of 25 kph

- Meters

- Seconds it take to travel each segment

I also have FT_Seconds and TF_Seconds so that I could do Evaluator on the time when going up/down a slope.

The problem is that I don't know how to make the calculations for the FT/TF attributes, how do i calculate so that it knows the slope is Up or Down?

I had some ideas of when traveling, if the next road segments mean Z value was higher then the slope would be up. and vice versa for going down.

What and how will I write it in the field calculator?

I know there is threads of this before, but what I have found non explains how to do the calculations.

Thanks.

//Anders