Using multi-source data to assess livability in Hong Kong at the community-based level: A combined subjective-objective approach

•An evaluation index system about the intra-city livability of Hong Kong is developed.•Multiple datasets such as statistic data, geo-data, and social media data are used.•Personal emotions on Instagram are extracted for measuring the intra-city livability.•The relationship between personal sentiment and intra-city livability is discussed.