CONNECT. TRANSFORM. AUTOMATE.
Michael Oberdries Growing Pains: The Auckland City ‘Capacity for Growth Study’
The Auckland Region
! Encompasses the Auckland metropolitan area, smaller towns, rural areas, and the islands of the Hauraki Gulf
! Population of 1.5 million
! Is home to 1/3 of all New Zealand’s residents
So what is the Capacity for Growth Study (CfGS) ?
! The CfGS is a way to measure the capacity a region has for accommodating residential and business growth under an operative (or proposed) planning rule book?
! The CfGS is a census of plan-enabled capacity.
The Strategic Context …
! A 30 year vision;
! For 1 million more people;
! For 400,000 more dwellings;
! Understanding WHEN, WHERE and HOW growth may occur?
The Operational Context …
! The restructuring of Local Government in Auckland …
! Combining the functions of a regional council and 7 city and district councils into an Auckland “Super City”
! Transitioning from 4 regional plans + 7 district plans to a single Auckland Unitary Plan
The Political Context …
But the biggest challenge of all ...
So what does the CfGS deliver?
Questions Segmentations ! Residential ! Business Commercial ! Business Industrial ! Rural Residential
Assessments ! Vacant land ! Redevelopment
potential ! Infill capacity
potential ! Vacant potential
Data Parcels
Rates assessments Titles
Building footprints Zoning
District plan provisions Environmental data
Infrastructure/services Floor space data
Employee counts Dwelling counts
Capacity Model
From a Workflow Schematic …
To FME Modelling Algorithms …
To Configurable Parameters …
Staged Implementation
Pilot Area
Legacy District
Supercity Region
INFILL is easy to detect visually …
INFILL is easy to conceptualise...
Residential parcel
Building footprint
District plan set backs
Geo-processing to calculate vacant portion of parcel
Geo-processing to check for vehicle access to the street
Calculate capacity Yield (dwellings)
Yield =
x additional
dwellings
But INFILL is difficult to computerize …
STEP 1 : Triangulate the vacant space on target parcels qualified by model constraints …
STEP 2 : Filter triangle candidates by AREA and SHAPE rankings …
STEP 3 : Replace triangle-geometry with circles to extend coverage on the vacant part of the parcel …
Every triangle has a circumscribed circle …
STEP 4 : Identify where the circle-geometry intersects the parcel polygon (exclusive of the building footprint) …
STEP 5 : Replace the circle-overlays with their b-box to extend coverage on the vacant part of the parcel …
STEP 6 : Identify where b-box geometry intersects the parcel polygon …
STEP 7 : Buffer building footprints and drop the INFILL candidates that exceed the zone min-area constraints …
STEP 8 : Qualify the INFILL candidates for building platform shape and test for road frontage access …
Back to the “real world” …
Business Capacity Modelling …
! Business capacity is constrained in 3 dimensions which means volumetric modelling
Consider a Business Zone and its neighbouring zones
Neighbouring zones affect business capacity : recession planes | yard setbacks | upper level road setbacks
STEP 1 : Extrude business parcels to their maximum allowable storeys
STEP 2 : Remove storeys within encroaching affectations to create the maximum permitted building envelope
STEP 3 : The potential for development is the difference between modelled and existing floor-space
STEP 4 : Illustrate various new development scenarios within maximum complying building envelope
FME generated GeoPDF Newmarket business area WITH (left) and WITHOUT (right) volcanic view-shaft height controls
Scenario Modelling …
Current Zoning Net Redevelopment Yield = 1065 new dwelling candidates
Test Zoning Net Redevelopment Yield = 2743 new dwelling candidates
Benefits from the CfGS
More informed decision making … ! Time and resource savings
! Project duration: 12 months, compared to 4 years ! Data modelling repeatability
! 1 to 2 days to run all models to completion ! Configurable “What if?” scenario modelling ! Improved information for stakeholders ! A data driven, evidence based approach
! Independent of the political pressures around outcomes ! Creation of data framework for additional research …
Thank You!
! Questions?
! For more information: ! [email protected] ! Oberdries Consulting Ltd
! http://www.aucklandcouncil.govt.nz/EN/planspoliciesprojects/reports/technicalpublications/Pages/capacityforgrowthstudy.aspx
CONNECT. TRANSFORM. AUTOMATE.
