# Determine carers willingness to walk to access services

This question was posted the Coverage assessment forum area and has 3 replies.

### FRANCK ALE

epidemiologiste

Normal user

14 Feb 2013, 09:26

### Ernest Guevarra

Katilingban

Technical expert

14 Feb 2013, 10:55

```
1 cm 20 cm
-------- = -------- ; x = 20 (0.5 km) = 10 kms
0.5 km x
```

So, the distance d between the two points is 10 kms.
There are other ways of calculating this distance depending on the geographic data that you have. For example, if you have GPS locations of points on the map, there are a lot of online applications that calculate these distances for you or you can apply simple coordinate geometry to get the difference between the two coordinates and come up with the distance.
I hope this answers your question.### Mark Myatt

Consultant Epidemiologist

Frequent user

14 Feb 2013, 13:22

**adjacent**villages and towns with markets (these are the distances shown on the map). We take the mean "d" and divide by two to give an estimate at the largest distance that carers might be willing to walk to access services. I hope this helps.

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