Paula Ezinne Melariri, June Teare, Opeoluwa Oyedele, Kirstie Eastwood, Wilma Ten Ham-Baloyi
Impact of an educational intervention on water, sanitation and hygiene knowledge, attitudes, and practices in early childhood development centres in low-socio-economic areas in the Nelson Mandela Bay, South Africa
PloS one
google maps directions application programming interface api accessmod tools increasingly used estimate travel time healthcare however formal comparison estimates tools conducted modelled compared median travel time mtt comprehensive emergency obstetric care cemoc using tools three nigerian conurbations kano portharcourt lagos compiled spatial layers cemoc healthcare facilities road network elevation land cover used leastcost path algorithm within accessmod estimate mtt nearest cemoc facility comparable mtt estimates extracted using api peak nonpeak travel scenarios investigated relationship mtt estimates generated tools raster celllevel 06 km resolution also aggregated raster cell estimates generate administratively relevant wardlevel mtt compared wardlevel estimates identified wards within conurbation falling different 15minute incremental categories 1515303045456060 189 101 375 wards 720 723 901 categorised 15 minute category kano portharcourt lagos respectively concordance decreased wards longer mtt accessmod mtt longer apis areas 45min raster celllevel mtt strong positive correlation 08 conurbations adjusted r2 linear model 06240723 high increasing marginally piecewise linear model 06770807 conclusion 45minutes wardlevel estimates api accessmod marginally different however longer travel times substantial differences exist amenable conversion factors