Capturing deprived areas using unsupervised machine learning and open data: a case study in São Paulo, Brazil

L. Trento Oliveira*, M. Kuffer, N. Schwarz, J.C. Pedrassoli

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
61 Downloads (Pure)

Abstract

Managing the rapid growth of deprived areas (commonly known as slums, informal settlements, etc.) in cities of Low- to Middle-Income Countries (LMICs) demands detailed and consistent information that is often unavailable. Recent Earth Observation (EO) mapping approaches with supervised classification models overlook the diversity of deprived areas and require resource-intensive training sets. In this study, we analyse the potential of unsupervised machine learning (ML) models to capture intra-urban diversity of deprived areas in São Paulo, using solely open geodata. We provide a workflow of characterising deprivation at a city scale with a disaggregated approach, offering scalability and transferability potential. First, we extract a pool of spatial features from open geospatial datasets to characterise the morphological and environmental conditions of the study area. After input preparation, we train and optimise a k-means model, including a coupled feature importance tool. Four cluster types emerged with different deprivation aspects such as higher and lower accessibility to services and infrastructure, sparser and denser occupation; regular and complex morphology; flat and steep terrain. This alternative methodology to capture diversity of deprived areas with open EO-based features can inform locally targeted, thus more efficient, urban policies and interventions.

Original languageEnglish
Article number2214690
JournalEuropean Journal of Remote Sensing
Volume56
Issue number1
Early online date19 May 2023
DOIs
Publication statusPublished - 31 Dec 2023

Keywords

  • Deprivation
  • Slums
  • Remote sensing
  • Unsupervised Machine Learning
  • clustering
  • Low-to-Middle-Income Countries
  • ITC-ISI-JOURNAL-ARTICLE
  • ITC-GOLD

Fingerprint

Dive into the research topics of 'Capturing deprived areas using unsupervised machine learning and open data: a case study in São Paulo, Brazil'. Together they form a unique fingerprint.

Cite this