Question

Determing Catchment for a Facility Using a Polygon Layer

  • 14 November 2016
  • 1 reply
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Currently I have:

A polygon layer with a population attribute

A point file containing facility locations.

Facility A has a catchment area of x amount of people. What tools can I utilize that will allow me to create a catchment of those polygons that bring a sum of x?

 

Which tool will work best for this scenario?

Thanks very much,

Justin


1 reply

Userlevel 4
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You could iterate through a loop with a NeighborFinder to first of all find all polygons with a facility in them and then "grow" those by adding touching polygons, adding up the population numbers until you reach "or get close" to your treshold value.

With polygons it'll be a rough approximation and you'll most likely not end up with the exact numbers. If you have population points (addresses with the number of people living there) you can get a better result.

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