This study utilizes AHP to analyze the key factors in determining the location of gas stations. The relative importance and priority ranking among the factors were derived and the factors determining the location of gas stations were given number ranks. Then the locational factors of the gas stations in Seoul City were analyzed. To this end, the factors were constructed into layers. The upper layer was composed of economic, demographic, land-use, transport factors and the lower economic layers were competition facilities, number of businesses, number of registered vehicles, and the lower demographic layers were population, population density, local income tax, and the lower land-use layers were use of land, land size, land price and the lower transport layers were traffic, accessibility and visibility.
Multiple priority results analysis show that relative importance of factors were ranked as follows: 1st traffic, 2nd accessibility, 3rd competition facilities, 4th visibility, 5th number of registered vehicles, 7th number of businesses, 8th local income tax, 9th use of land, 10th population, 11th land price, 12th land size. Comprehensive assessment of location analysis based on the results utilizing GIS showed that within Seoul, Yangcheon Area is the best location.