Relation between Air Cargo Transported and Airport Characteristics in Indonesia using Geographically Weighted Regression

Air cargo shipments in Indonesia have recently increased. This research aims to analyze spatial inequality on the relation of air cargo volume which is transported and airport characteristics in Indonesia. The characteristics of the airport that examined are the length of airport runway and the number of departures of the aircraft. We use data of 102 airports in Indonesia. A geographically weighted regression (GWR) model has been fitted to analyze the spatial heterogeneity. The GWR model obtained is compared with the global regression model using some comparative statistics. The modeling results show that the number of air cargo transported correlates with the length of the airport runway and its relationship varies across the airports. The influence of the runway length on air cargo transportation is higher at airports in western Indonesia, while less influence occurs on airports in eastern Indonesia. The number of air cargo is also positively correlated with the number of departures of the aircraft, which influence the number of departures aircraft at airports on the island of Sumatra which is higher than in other airports in Indonesia.