Geographic information systems (GIS) analysis has not been widely used in underdeveloped countries to ensure that vulnerable populations have accessibility to primary health-care services. This study applied GIS methods to analyse the spatial accessibility to urban primary-care centres of the population in Kermanshah city, Islamic Republic of Iran, by age and sex groups. In a descriptive-analytical study over 3 time periods, network analysis, mean centre and standard distance methods were applied using ArcGIS 9.3. The analysis was based on a standard radius of 750 m distance from health centres, walking speed of 1 m/s and desired access time to health centres of 12.5 mins. The proportion of the population with inadequate geographical access to health centres rose from 47.3% in 1997 to 58.4% in 2012. The mean centre and standard distance mapping showed that the spatial distribution of health centres in Kermanshah needed to be adjusted to changes in population distribution. 3. L'analyse reposait sur un rayon standard de 750 mètres de distance à partir des centres de soins, à une vitesse de marche d'un mètre par seconde et un temps d'accès souhaité aux centres de soins de santé de 12,5 minutes. La proportion de la population ayant un accès géographique inadéquat aux centres de soins a augmenté, passant de 47,3 % en 1997 à 58,4 % en 2012. La cartographie de la distance moyenne et standard jusqu'aux centres a révélé que la répartition spatiale des centres de soins de santé à Kermanshah devait être ajustée aux changements dans la répartition de la population.
اجلغرافية املعلومات لنظم