Fig. 1From: Development of a method for walking step observation based on large-scale GPS dataDensity of GPS logs. Density (number of GPS logs per square kilometre) was clculated by the kernel density tool of ArcGIS Pro (Ver. 2.8.3). For the density of all of Japan, the cell size was 1Â km, and the bandwidth was 10Â km. For the density around Sendai, the cell size was 50Â m, and the bandwidth was 250Â mBack to article page