mapping the quality of life experience in alfama: a case study in lisbon, portugal pearl may dela...
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A case study in Lisbon, Portugal
Mapping the Quality of Life Experience in Alfama
Pearl May dela CruzPedro CabralJorge Mateu
Introduction
“Socrates, we have strong evidence that the city pleased you; for you would never have stayed if you had not been better pleased
with it.” — Plato
Introduction Lisbon –
45th out of 420 cities worldwide(Mercer 2010 Quality of Living Survey)
Quality of Livingvs.
Quality of Life (QoL)
Objectives Assess the urban QoL in Alfama
Determine the relationship between objective and subjective QoL
Evaluate the current situation in Alfama
Determine which subjective indicators have the highest priorities
Determine if subjective QoL is spatially autocorrelated
Hypotheses There is no linear relationship between
objective and subjective QoL
Subjective QoL is not spatially dependent
Conceptual Framework
Quality of Life (QoL)
Correlation and Spatial autocorrelation analysis
Spatial prediction
Multi-Criteria Decision Analysis (MCDA)
Indicator Domains
Physical Social Economic
Perceptions to indicators
Subjective QoL
Objective QoL
Distance to services
Study Area
Lisbon
Portugal
DNKRW 1CBE 2CBE 3CBE CSEC
Study Area
DRW – Do not know how to read and write UNIVC – Completed university course1CBE – Completed 1º cycle of basic education 1COBE – Studying 1º cycle of basic education2CBE – Completed 2º cycle of basic education 2COBE – Studying 2º cycle of basic education3CBE – Completed 3º cycle of basic education 3COBE – Studying 3º cycle of basic educationCSEC – Completed secondary education COHI – Studying in high schoolMEDC – Completed medium course COUNI – Studying in the University
2001 Educational Attainment in Alfama (INE, 2001)
15186
74 87 91 117144
0
200
400
600
800
1000
1200
1400
1600
MEDC UNIVC 1COBE 2COBE 3COBE COHI COUNIV
Fre
qu
ency
548
1437
390475
338
Study Area
2001 Building Age statistics
228
31 33
0
50
100
150
200
250
300
350
400
1919-1945 1945-1980 1980-2001
Date Built
Nu
mb
er
of
Bu
ild
ing
s
363
Before 1919
Study Area
Social Services in Alfama
Study Area
Market and Food Services in Alfama
Research Methodology
Objective QoL Subjective QoL
Perceptions
Field data collection
Distance to services
GPS points of service locations
Residential Survey
Likert scale
INPUT DATA
Research Methodology
Objective QoL Subjective QoL
Perceptions
Field data collection
Distance to services
GPS points of service locations
Residential Survey
Likert scale
INPUT DATA
Objective Indicators
Distance from a nearest service Recycling bin Parking lot Police station Recreational center Market Urban open space Main street Public transport stop Restaurant Institution High and low order
shop
10.24 m
23.12 m
Subjective IndicatorsPhysical Domain
Street cleanliness Car circulation Parking space sufficiency Green space availability
Social Domain Safety at home Safety at streets Health care center
accessibility Supermarket accessibility Public transport facility
accessibility Recreational center
accessibility Recycling bin accessibility Neighborhood InteractionEconomic Domain
Level of education Affordability of housing
cost Housing quality
CorrelatedNot correlated
Research Methodology
Not correlated
Linear regression model
Spatial autocorrelation of residuals
Variogram analysis
Regression-kriging
Correlation Analysis
Environmental Correlation
Correlated
Spatial autocorrelation of variables
Ordinary krigingIDW
>1 parameterPure nugget effect
Voronoi Polygons
Cross Validation Cross Validation
Correlated
Spatial Prediction
Not correlated
Research Methodology
Weighted Sum
Spatial predictions of all indicators
Multi-Criteria Decision Analysis (MCDA)
Specified weights of respondents
Weighted Sum
Overall QoL map
Results
Respondent Survey Points in Alfama
Results
Service locations in Alfama
Services within Alfama
Services Frequency Services Frequency
Urban open space 9 Phone booths 2
Pharmacy 1 Shower place 1
Bakeries 4 Hostel 1
Markets 15 Drinking fountains 4
Salon 7
Bus stops 2 Recycling bins 2
Tram stops 2 Museums 3
Laundry shop 1
Internet café 1 Art Galleries 2
Government offices 3 Churches 2
Police station 1 Recreational centers
2
Bank 1 Sports centers 2
Restaurants 85
High and low order shops 24
Results – Polyserial Correlation
Objective Subjective
Distance from a nearest service
Street cleanliness Car circulation Parking space Green Space
Rho P-value Rho P-value Rho P-value Rho P-value
Recycling bins 0.06 0.128 0.09 0.126 0.04 0.128 -0.05 0.130
Parking lots -0.04 0.128 0.08 0.129 <-0.0 0.130 <0.0 0.131
Police stations 0.10 0.126 0.02 0.131 0.01 0.129 0.06 0.128
Recreational centers 0.05 0.127 0.26 0.119 0.07 0.127 0.05 0.127
Markets 0.18 0.123 0.16 0.125 -0.13 0.125 <0.0 0.129
Urban open spaces 0.10 0.126 -0.02 0.128 0.02 0.127 0.09 0.128
Main streets -0.02 0.128 0.23 0.119 -0.02 0.128 -0.10 0.130
Public transport facilities
-0.03 0.127 -0.16 0.124 -0.10 0.126 -0.10 0.128
Restaurants 0.13 0.125 0.20 0.12 -0.26 0.118 0.09 0.128
Institutions -0.01 0.128 -0.16 0.124 0.04 0.128 0.33 0.112
High and low order shops
0.07 0.127 -0.07 0.126 -0.12 0.124 -0.02 0.129
Results – Moran’s I Test
Subjective Indicator Moran's Index P-value
Street cleanliness -0.075618 0.453490
Car Circulation 0.084046 0.226065
Parking Space 0.040147 0.500866
Green Space 0.029617 0.584764
Safety at Streets 0.107389 0.134920
Health Care center Accessibility -0.082397 0.405184
Supermarket Accessibility -0.056243 0.608571
Recreational Center Accessibility 0.027370 0.606232
Neighborhood Interaction -0.084477 0.388314
Level of Education 0.020318 0.664140
Affordability of Housing Cost -0.011197 0.965526
Housing Quality 0.102984 0.147231
Safety at Home 0.209053 0.005651
Public Transport Facilities Accessibility 0.215310 0.004544
Recycling Bin Accessibility 0.234164 0.002270
Voronoi Polygons - Physical1. Car Parking Space 2. Street Cleanliness
3. Green Space 4. Car Circulation
Variogram Modeling
distance
sem
ivar
ianc
e
0.05
0.10
0.15
0.20
0.25
0.30
20 40 60
distance
sem
iva
ria
nce
0.01
0.02
0.03
0.04
0.05
20 40 60 80 100
distance
sem
ivar
ianc
e
0.05
0.10
20 40 60 80 100
2. Safety at home1. Recycling bin accessibility
3. Public transport facilities
accessibility
Results – Ordinary Kriging
Excellent
Extremely Poor
Average
Above Average
Below Average
Safety at Home
Excellent
Extremely Poor
Average
Above Average
Below Average
Results – Ordinary Kriging
Recycling Bin Accessibility
Results – Ordinary Kriging
Public Transport Facilities Accessibility
Excellent
Extremely Poor
Average
Above Average
Below Average
8.942
0.009
-11.301
Public Transport Facilities Accessibility
Prediction Prediction Variance
Observed Values
Residuals Z-score
Min. 2.440 0.009422 1.000
1st Qu. 3.411 0.035374 3.000 -0.571409 -2.916
Median 3.761 0.043237 4.000 0.035570 0.189
Mean 3.681 0.038150 3.681
3rd Qu. 3.934 0.045650 4.000 0.5704147 2.670
Max. 4.682 0.051803 5.000
-2.359038
0.0003426
1.8702533 Residuals Z-score
-0.04447 -0.0822
Residuals Z-score
0.01018 0.01915
Residuals Z-score
0.000343 0.009
Safety at HomePublic Transport
Facilities AccessibilityRecycling Bin Accessibility
Results – Cross Validation (CV)
Housing Quality 0.314
Results – Weighted SumPhysical QoL
Domain Weight
Car circulation 0.19
Car parking space 0.22
Green space 0.28
Social QoL
Domain Weight
Health care accessibility
0.136
Supermarket accessibility
0.117
Public transport facilities accessibility
0.123
Recreational center accessibility
0.099
Recycling bin accessibility
0.087
Neighborhood interaction
0.076
Economic QoL
Domain Weight
Safety at home 0.182
Safety at streets 0.180
Street cleanliness 0.31
Affordability of housing cost
0.343
Level of education 0.343
Results – Weighted Sum
Physical Quality of Life
Results – Weighted Sum
Economic Quality of Life
Results – Weighted Sum
Social Quality of Life
Results – Weighted Sum
Overall Quality of Life
Overall QoL
Domain Weights
Physical 0.246
Social 0.377
Economic 0.377
Discussion & Conclusion Objective and subjective indicators are not
significantly correlated
“Absence of evidence is not evidence of absence.” (Altman & Bland, 1995)
Discussion & Conclusion Problems occurred in correlation
Sample size Geographical scale Significance criterion Validity doubts
“Moving between scales trade off the loss of heterogeneity for the gain of predictability.” (Costanza et al., 2007)
Discussion & Conclusion Inter-correlations within subjective QoL shows moderate to
high correlations
Spatial-autocorrelation has similar issues with correlation
Poor CV of variogram does not mean it is wrong ( i.e. anisotropy, nonstationarity)
Low objective QoL threshold experience (LOTE), means higher covariation with subjective QoL (Cummins, 2000)
Measured QoL is only a depiction at a particular time
Future Work Multiple correlation Improve the experimental and
semivariogram Consider anisotropy and nonstationarity Cluster analysis
Recommendation Larger geographic region Enough and well-distributed sample size Involvement of local government
Thank you!
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