เปรียบเทียบวิธี

	Multi-Criteria Site Selection	Accessibility Analysis
สาขาวิชา	Urban Studies	Human Geography
ตระกูล	MCDM	Process / pipeline
ปีกำเนิด	2006	1959
ผู้ริเริ่ม	Jacek Malczewski (GIS-MCDA synthesis); Thomas Saaty (AHP weighting)	Walter G. Hansen
ประเภท	Spatial multi-criteria decision analysis for siting facilities or land uses	Spatial index of the ease of reaching opportunities from a location
แหล่งต้นตำรับ	Malczewski, J. (2006). GIS-based multicriteria decision analysis: a survey of the literature. International Journal of Geographical Information Science, 20(7), 703–726.	Hansen, W. G. (1959). How accessibility shapes land use. Journal of the American Institute of Planners, 25(2), 73–76.
ชื่อเรียกอื่น	GIS-MCDA, Weighted Overlay Suitability, AHP Site Suitability, Spatial Multi-Criteria Evaluation	Hansen Accessibility, Gravity Accessibility Measure, Potential Accessibility, Spatial Accessibility Index
ที่เกี่ยวข้อง	4	4
สรุป	Multi-criteria site selection combines multi-criteria decision analysis (MCDA) with geographic information systems to choose where to locate a facility or land use when many, often conflicting, spatial criteria matter at once. Synthesized as GIS-based MCDA by Jacek Malczewski, it standardizes each criterion layer to a common scale, assigns the criteria importance weights — frequently via Saaty's Analytic Hierarchy Process — and combines them through weighted overlay to produce a suitability surface that ranks every candidate location. The method makes an inherently messy, value-laden siting decision explicit, reproducible, and auditable.	Accessibility analysis measures how easily opportunities — jobs, shops, clinics, parks — can be reached from a given location, combining the attractiveness (size) of destinations with the cost of travelling to them. The gravity-based formulation introduced by Walter Hansen in 1959 sums the opportunities at all destinations, each discounted by a distance-decay function of travel cost, producing a single accessibility score per origin that has become a foundational concept in transport geography and urban planning.