[postgis-users] Using routing to create polygons of estimated travel distances

[Simon O'Malley]

Hi List

Trying to get my head around the easiest way to generate a contour map of
travel times from a central location based on road centreline network.

We have a central location and need to generate polygons showing which
properties are with 5, 10, 15 etc minutes of this location.

A road network is present with estimated speeds along each segment so we can
calculate estimated travel time along each segment.

How do we go about traversing the networking and creating points at say 5
minute intervals, making sure we are travelling away from the central
location.

The idea was then to join up the points to create polygons and overlay over
the property boundaries.

Any ideas/help much appreciated.

Simon
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