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A Fine-Grain Multi-Indicator Analysis of the Urban Form of Five Informal Settlements in East Africa

机译：东非五种非正式住区城市形态的精细谷物多指标分析

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Few studies have investigated the urban morphology of informal settlements at fine-grain level, limiting effective urban planning and policies targeting such areas. This study presents a high-resolution morphological analysis of five informal settlements located in central areas of major cities in East Africa. The analysis is based on indicators of urban form, statistical comparison, and field interviews on household conditions. The method improves the replicability and increases the spatial granularity compared to previous studies. Outcomes show that all case studies are characterised by organic street layouts. Three settlements form a comparable group with denser urban fabrics (small block size, high coverage ratios, and small private spaces), while the remaining two cases have less compact forms. The field interviews show high rates of tenancy, overcrowding, and inadequate access to water and sanitation in the first group and low rates of these conditions in the second group. We suggest that these differences are partially an outcome of levels of informal land supply. We argue that decreased informal land supply leads to increased competition and higher prices of accommodation, leaving fewer household resources for infrastructure investments and consequent compromised livelihoods. Accordingly, we argue that some modes of informal urban development should be accepted in Sub-Saharan Africa.
机译：少数研究已经调查了细粮水平的非正式定居点的城市形态，限制了有效的城市规划和针对这些领域的政策。本研究介绍了位于东非主要城市中心地区的五个非正式住区的高分辨率形态分析。分析基于城市形态，统计比较和家庭状况的实地访谈。该方法提高了可重量的可重量，并与先前的研究相比增加了空间粒度。结果表明，所有案例研究都以有机街道布局为特征。三个定居点形成具有更密集的城市织物（小块尺寸，高覆盖率比和小型私人空间）的可比组，而剩下的两种情况表格较小。现场访谈显示出高租赁，过度拥挤，在第一组的水平和卫生获得的高速度，并在第二组中这些条件的低利率。我们建议这些差异部分是非正式土地供应水平的结果。我们认为，下降的非正式土地供应导致竞争增加和高价格，留下较少的家庭资源，为基础设施投资和随之受损的生计。因此，我们认为，在撒哈拉以南非洲，应接受一些非正式城市发展模式。

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