urban design quality, a function of variety prof.dr.ir. taeke m. de jong r. schmaeling conference...
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Urban design quality, a function of variety
Prof.dr.ir. Taeke M. de Jong R. Schmaeling conference
Rīga October 29th 2014
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The domain of Urban and Architectural design
Imagine a school with elevators and corridors leading you through different spatial levels, time-spans, and layers of design.
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A scale paradox, its factor 3
Any conclusion about space is scale-sensitive.
It can change into its opposite already with a factor 3 of scale.
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Ten levels of variety to be explored
R={30, 10km} R=10km R=3km 1930 R=1km R=0,3km 1650
R=100m 1970 R=30m R=10m R=3m R=1m (2x2m)
Look for differences at any level of scale
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A frame 100x the grain of a drawing representing a building
Any representation has an upper and a lower boundary:a frame and a grain.
Let us notate them as a ‘nominal radius’ R and r.
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Boundaries of nominal R and r
A ‘nominal’ radius is a name for a range of measures.
‘R=10m’ is something between 3m and 30m.
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Usual names fitting R=
10000km Global 30m Building complex 3000km Continental 10m Building 1000km Subcontinental 3m Building segment
300km National 1m Building part 100km Sub national 300mm Building component
30km Regional 100mm Super element 10km Sub regional 30mm Element
3km Town 10mm Sub element 1km District 3mm Super material
300m Neighbourhood 1mm Material 100m Ensemble <1mm Sub material
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Object in Context (months, years)
Any object has impacts in different layers of context at different levels of scale.
A programme is simply a set of intended impacts.
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Ten levels of variety to be explored
R={30, 10km} R=10km R=3km 1930 R=1km R=0,3km 1650
R=100m 1970 R=30m R=10m R=3m R=1m (2x2m)
Look for differences at any level of scale
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Content diversifies space
Fig. 1 Example 6x6km 1930a
0├──────────────3km Ecology3km lifeless many species Housing3km attached detached Agriculture3km fields settlements
Technology3km energy information
Economy3km consumption supply
Meeting3km home work
Culture3km traditional experimental
Management3km laissez-faire initiative ... … …
Fig. 2 Example 2x2km
0├──────────────1km
History1km -300 000 000yr +10yr
Occupation1km natural urban
Network Density1km 0.7km/km2 7km/km2
Intensity1km 0hrs/yr 8 760hrs/inh*yr
Pollution1km clean contaminated
Routing1km points surfaces
Image1km homogeneous heterogeneous
... … …
a Bonnekaart(1929)
Some values of named variables may serve as legend units.
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Form distributes content in space
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Form = state of distribution
AccumulationDeconcentration
Concentration
Sprawl
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States of distribution of 100 spots
Any shape appears between total sprawl and total accumu-lation
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Concentration and Deconcentrationat 2 levels ...
… result in accumulation and sprawlat different levels of scale.
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Structure stabilises form
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Functions at different levels of scale
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Intentions and expectations about the object in its context
Stakeholders, specialists and users can be located on scale and layer.Ask them to specify the intentions and expectations in their position.
Package
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Intentions and expectations are different modes of thinking
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What is spatial quality?
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Quality as a function of variety
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ÝVa10m
Va30m
Va10m
Va3m
Va1m
ÝRe10m
Re30m
Re10m
Re3m
Re1m
ÝVa10m
Va30m
Re10m
Va3m
Re1m
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ÝVa10m
Va30m
Re10m
Va3m
Re1m
ÝRe10m
Va30m
Re10m
Re3m
Re1m
ÝVa10m
Va30m
Re10m
Va3m
Va1m
ÝVa10m
Va30m
Va10m
Va3m
Va1m
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Variety in modes, orders, levels and layers
modes orders levels layersprobable intention … managerialpossible function 1mm cultural
imaginable structure … economic form 1m technical
desirable content 3m biological 10m physical …
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Further reading