So sánh phương pháp

	Mô hình Tương tác Không gian (Trọng lực)	Mô hình Phân bổ-Địa điểm
Lĩnh vực	Phân tích không gian	Phân tích không gian
Họ	Regression model	Process / pipeline
Năm ra đời	1971	1963
Người khởi xướng	Alan Wilson (entropy-maximizing family)	Leon Cooper; S. L. Hakimi
Loại	Model of flows between spatial origins and destinations	Spatial facility-location optimization
Công trình gốc	Wilson, A. G. (1971). A family of spatial interaction models, and associated developments. Environment and Planning A, 3(1), 1–32.	Cooper, L. (1963). Location-allocation problems. Operations Research, 11(3), 331–343.
Tên gọi khác	gravity model, spatial interaction model, competing destinations model, mekânsal etkileşim modeli	facility location, p-median problem, maximal covering location problem, yer-tahsis modelleri
Liên quan	4	4
Tóm tắt	Spatial interaction models predict the volume of flows — migrants, commuters, shoppers, trade, trips — between origins and destinations as a function of the size of each place and the distance or cost separating them. By analogy to Newton's gravity, interaction rises with the 'mass' of origin and destination and falls with separation, and Wilson's 1971 entropy-maximizing family put these models on a rigorous footing for transport, migration, and retail analysis.	Location-allocation models decide where to place a set of facilities and simultaneously assign demand points to them so as to optimize an objective such as total travel cost, worst-case distance, or population covered. Rooted in the operations-research work of Cooper (1963) and Hakimi (1964) and central to network GIS, they answer questions like where to site warehouses, hospitals, fire stations, or schools to best serve a spatially distributed population.