Fig. 1From: Mapping and enumerating houses and households to support malaria control interventions on Bioko IslandThe mapping and coding system for Bioko. A virtual grid of 1 × 1 km map-areas (grey lines) was used to generate unique identifiers. Example map-areas M0277 (urban) and M0504 (rural) are highlighted with red and blue boxes, respectively. The yellow dots represent housing units in 2018; grey areas are uninhabitedBack to article page