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Trouble with Service Area polygon size

Question asked by stevetaylor82 on Aug 29, 2012
Latest reply on Aug 31, 2012 by stevetaylor82

I've had a look at previous threads discussing this issue but the solutions suggested on those threads have not seemed to help with the problem I have.

I have set the Service Area Polygons to distances of 5, 10 and 20 miles from my locations (using the equivalent number of meters - 8047m, 16093m, 32187m) but the result is confusing. As you can see in the picture there is very little difference between the 5mile and 10mile polygon in the North-East direction despite roads existing there.  Also I measured the 20 mile polygon distance using the green route (applied to the same network) but the route measures 12.5miles yet reaches the edge of the 20mile polygon boundary?


Can anyone explain why this is? In previous threads creating a route on the network was suggested to identify broken links but in this case the route is fine but the service area is incorrect?

Thanks for your time,