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Assessment process in the delimitation of historic urban landscape of Algiers by AHP

Boukratem Oumelkheir

Boukratem Oumelkheir

  • EPAU, Polytechnic School of Architecture and UrbanismAlgiers, Algeria
  • Laboratory City Urbanism Sustainable Development (VUDD) EPAUAlgiers, Algeria
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Oumelkheir, Boukratem
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Djelal Nadia

Djelal Nadia

  • EPAU, Polytechnic School of Architecture and UrbanismAlgiers, Algeria
  • Laboratory City Urbanism Sustainable Development (VUDD) EPAUAlgiers, Algeria
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Nadia, Djelal
  
30 apr 2021
Assessment process in the delimitation of historic urban landscape of Algiers by AHP's Cover Image
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Pubblicato online: 30 apr 2021
Pagine: 110 - 126
Ricevuto: 20 feb 2020
Accettato: 24 ott 2020
DOI: https://doi.org/10.2478/mgrsd-2020-0053
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© 2021 Boukratem Oumelkheir et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Map of the location of the central, historic urban area of Algiers.Source: own study
Map of the location of the central, historic urban area of Algiers.Source: own study

Figure 2

The conceptual framework for the process of delimitation of landscape in the historical urban area context.Source: own study
The conceptual framework for the process of delimitation of landscape in the historical urban area context.Source: own study

Figure 3

Map Historical Evolution of Algiers on Year 1880 locationSource: based on map dating from 1880
Map Historical Evolution of Algiers on Year 1880 locationSource: based on map dating from 1880

Figure 4

Map of natural elements in the central historic urban area of AlgiersSource: own study
Map of natural elements in the central historic urban area of AlgiersSource: own study

Figure 5

Map of historical centrality of AlgiersSource: own study
Map of historical centrality of AlgiersSource: own study

Figure 6

Map of heritage concentration and recognition in the central historic urban area of AlgiersSource: own study based on information from PDAU Algiers
Map of heritage concentration and recognition in the central historic urban area of AlgiersSource: own study based on information from PDAU Algiers

Figure 7

Map of distinguishing elements of the central historic urban area of Algiers.Source: own study
Map of distinguishing elements of the central historic urban area of Algiers.Source: own study

Figure 8

Criterion value ranking in the landscape configuration of the casbah Algiers (P1)Source: own study
Criterion value ranking in the landscape configuration of the casbah Algiers (P1)Source: own study

Figure 9

Criterion value ranking in the landscape configuration of the colonial city within the protection walls of Algiers (P2)Source: own study
Criterion value ranking in the landscape configuration of the colonial city within the protection walls of Algiers (P2)Source: own study

Figure 10

Criterion value ranking in the landscape configuration of the colonial city historical centrality of Algiers (P3)Source: own study
Criterion value ranking in the landscape configuration of the colonial city historical centrality of Algiers (P3)Source: own study

Figure 11

Criterion value ranking in the landscape configuration of the colonial city evolution of heights of Algiers (P4)Source: own study
Criterion value ranking in the landscape configuration of the colonial city evolution of heights of Algiers (P4)Source: own study

Figure 12

Criteria contribution for the delimitation of HUL AlgiersSource: own study
Criteria contribution for the delimitation of HUL AlgiersSource: own study

Figure 13

Delimitation of HUL AlgiersSource: own study
Delimitation of HUL AlgiersSource: own study

Figure 14

Map alternatives for the delimitation of HUL AlgiersSource: own study
Map alternatives for the delimitation of HUL AlgiersSource: own study

Criteria and sub-criteria in the alternative delimitation of the historical urban landscape of Algiers

Criteria Sub-criteria
Site Beauty SC1 Maritime site
SC2 Bay configuration
SC3 Port site
SC4 Morphology and topography of the hilltop's relief (promontory, plateaus, amphitheatre)
SC5 Physical and natural views of the bay
Urban Beauty Configuration SC6 Sharing the exceptionality of the beauty of the coastal boulevard
SC7 Urban ensembles inclined against rugged land
SC8 Gardens location
SC9 Interdependence of the architectural dimension and the urban dimension
Relational System Configuration SC10 Territorial structuration dating from the Roman period
SC11 Interpenetration of the colonial city in the context of the medina
SC12 Road extensions in relation to the medina, the sea, and the protective walls in the first phase
SC13 Haussmann-style typology of urban axes in relation to the site and the sea in the second phase
SC14 The structural spatial typology of links through public squares
Historical Centrality Configuration SC15 Cultural heritage concentration in the casbah
SC16 Concentration of urban spaces for centralizing activities
SC17 Urban axes centralising city walks
SC18 Persistence of commercial port activity and its development as an economic exchange centre
Heritage System Configuration SC19 Universal heritage component of the traditional Algiers’ casbah
SC20 Safeguarding the casbah sector over an area of 105 ha (with protection bands)
SC21 Architectural typological diversity of landmark buildings belonging to the traditional city, and of public buildings of the colonial city
SC22 Concentration of heritage buildings with exemplary architectural and urban qualities from the nineteenth century

Performance sub-criteria in alternative delimitation of historical urban landscape of Algiers

SC1 SC2 SC3 SC4 SC5 SC6 SC7 SC8 SC9 SC10 SC11 SC12 SC13 SC14 SC15 SC16 SC17 SC18 SC19 SC20 SC21 SC22
0.297 0.103 0.077 0.059 0.023 0.067 0.031 0.021 0.008 0.041 0.074 0.021 0.014 0.008 0.040 0.022 0.038 0.008 0.028 0.012 0.008 0.004
P1 [Landscape casbah city] 0.178 0.062 0.046 0.035 0.014 0.040 0.019 0.013 0.005 0.024 0.044 0.013 0.008 0.005 0.024 0.013 0.023 0.005 0.017 0.007 0.005 0.002 0.603
P2 [Landscape colonial city within the protection walls) 0.074 0.026 0.019 0.015 0.006 0.017 0.008 0.005 0.002 0.010 0.018 0.005 0.003 0.002 0.010 0.005 0.009 0.002 0.007 0.003 0.002 0.001 0.251
P3 [Landscape colonial city historical centrality] 0.018 0.006 0.005 0.004 0.001 0.004 0.002 0.001 0.000 0.002 0.004 0.001 0.001 0.000 0.002 0.001 0.002 0.000 0.002 0.001 0.000 0.000 0.060
P4 [Landscape colonial city evolution of heights] 0.027 0.009 0.007 0.005 0.002 0.006 0.003 0.002 0.001 0.004 0.007 0.002 0.001 0.001 0.004 0.002 0.003 0.001 0.003 0.001 0.001 0.000 0.090

Pairwise comparison matrix criteria; level 1

Site Beauty Urban Beauty configuration Relational System configuration Historical Centrality Heritage System configuration Priority Vector
Site Beauty 1 1/5 1/5 1/7 1/7 0.540
Urban Beauty configuration 5 1 3 1/3 1/3 0.128
Relational System configuration 5 1/3 1 1/5 1/3 0.213
Historical Centrality configuration 7 3 5 1 1/2 0.067
Heritage System configuration 7 3 3 2 1 0.052
λmax=5.358 CI=0.089 CR=0.080
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