NDLI: Worldwide Detection of Informal Settlements via Topological Analysis of Crowdsourced Digital Maps

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Worldwide Detection of Informal Settlements via Topological Analysis of Crowdsourced Digital Maps

Content Provider	MDPI
Author	Soman, Satej Beukes, Anni Nederhood, Cooper Marchio, Nicholas Bettencourt, Luís
Copyright Year	2020
Description	The recent growth of high-resolution spatial data, especially in developing urban environments, is enabling new approaches to civic activism, urban planning and the provision of services necessary for sustainable development. A special area of great potential and urgent need deals with urban expansion through informal settlements (slums). These neighborhoods are too often characterized by a lack of connections, both physical and socioeconomic, with detrimental effects to residents and their cities. Here, we show how a scalable computational approach based on the topological properties of digital maps can identify local infrastructural deficits and propose context-appropriate minimal solutions. We analyze 1 terabyte of OpenStreetMap (OSM) crowdsourced data to create worldwide indices of street block accessibility and local cadastral maps and propose infrastructure extensions with a focus on 120 Low and Middle Income Countries (LMICs) in the Global South. We illustrate how the lack of physical accessibility can be identified in detail, how the complexity and costs of solutions can be assessed and how detailed spatial proposals are generated. We discuss how these diagnostics and solutions provide a multiscalar set of new capabilities—from individual neighborhoods to global regions—that can coordinate local community knowledge with political agency, technical capability, and further research.
Starting Page	685
e-ISSN	22209964
DOI	10.3390/ijgi9110685
Journal	ISPRS International Journal of Geo-Information
Issue Number	11
Volume Number	9
Language	English
Publisher	MDPI
Publisher Date	2020-11-16
Access Restriction	Open
Subject Keyword	ISPRS International Journal of Geo-Information Isprs International Journal of Geo-information Imaging Science Remote Sensing Openstreetmap Cities Slums Network Analysis Human Development Urban Planning Gis Cloud Computing
Content Type	Text
Resource Type	Article

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