topic overview
term:
definition:
Potential Polycentric Integration Area - PIA
theme: Spatial Structuresdefinition:
"PIAs have been constructed by merging the PUSH areas of neighbouring cities, if the, demographically speaking, smaller one sharesat least 1/3 of its PUSH area with the larger one. Each PUSH area belongs to one PIA only, the largest neighbouring city being preferred when there are multiple overlaps.Multiple tiers of integration can occur within a single PIA. Neighbouring PIAs can overlap."
source:ESPON thematic project, project 1.1.1.'Polycentricity' (DTPI), p. 24
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