The socio-spatial dysfunction in mass housing cities of Algeria: technical wayfinding analysis by method “movement traces” and morphology analysis (space syntax) by software “depthmap”

Abstract This document develops a model of analysis and investigation of the impact of the socio-spatial dysfunction of the pedestrian movement, as well on urban reproduction, especially the transformations of the facades and also the appropriation of outdoor spaces in mass housing cities of Algeria. The technical analysis and spatial syntax of the visibility (Visibility Graph Analysis – VGA) and the accessibility (All Line Analysis – ALA) was performed by the software “DepthMap©(UCL, Londres)” and the wayfinding dysfunction analysis by the method of “movement traces”. This is a case study as the city 1000 housing of Biskra and city 500 housing of M’sila. In order to verify this hypothesis, we developed a hybrid analysis model, the diagram interference of the two techniques. The interference results show that the majority of pedestrians prefer straight roads and shorter axes with a strong syntax property of visibility and accessibility (integration, connectivity and intelligibility) in directions of the peripheral equipment (adjacent) and to the center of the two cities. These routes have a direct impact on the transformations of the facades and also the appropriation of outdoor spaces. The model developed promises future research on the quantification, modeling and simulation of the process, in particular by cellular automata.

摘要 本研究构建了一套分析与研究框架，用于探究阿尔及利亚大规模公共住房社区中，行人流动的社会空间失序对城市再生产——尤其是建筑立面改造与户外空间占用——所产生的影响。本研究依托伦敦大学学院（UCL）开发的DepthMap©软件，开展了可视性图分析（Visibility Graph Analysis, VGA）与全轴线分析（All Line Analysis, ALA），并通过“移动轨迹法”完成了寻路失序分析。本次研究以比斯克拉市1000套住房社区与姆西拉市500套住房社区作为案例对象。为验证所提出的研究假设，本研究构建了融合两类分析技术的混合模型，即双技术图示交互分析方法。分析结果显示，绝大多数行人更倾向于选择直线型道路与短距离轴线，这类轴线在通往周边配套设施（相邻地块）与两座城市中心的方向上，具备较强的可视性与可达性句法属性（整合度、连接度与可理解度）。此类路径对建筑立面改造与户外空间占用均产生了直接影响。本研究所构建的模型为后续相关研究提供了支撑，未来可依托元胞自动机（cellular automata）开展该过程的量化分析、建模与模拟工作。