Towards Data-driven Spatial Justice: Identifying Walking-inaccessible Grocery Zones for Technologically Disadvantaged Groups in Dortmund

This study analyzes walking-accessibility to stationary grocery retailers for technologically disadvantaged groups (TDG) in Dortmund, Germany. As e-grocery platforms expand, populations facing barriers to digital adoption, whether due to age, migrationrelated barriers, or economic vulnerability, face a dual-exclusion risk: limited access to online platforms combined with a thinning physical retail network. TDGs are operationalized through three socio-demographic dimensions using z-score standardized indicators at the district level. Local Moran’s I identifies statistically significant spatial concentration zones. Network-based service-area analysis evaluates walking-accessibility at 500 m, 700 m, and 1,000 m thresholds around fullrange supermarkets and discounters. The findings reveal persistent inaccessible zones on the outskirts of the elderly and fragmented supply in economically disadvantaged inner-city districts.