Fig. 1From: Physical activity and activity space in patients with pulmonary fibrosis not prescribed supplemental oxygenGPS data from one subject at two time points. Panel a. GPS tracks. Panel b. SDE for the same subject. Panel c. RNB for the Footnote: SDE = standard deviational ellipse; RNB = road network buffer. Data from two timepoints are given to show capabilities of data. Blue = data collected at baseline; green = data collected after supplemental oxygen was started. For both SDE and RNB, larger areas indicated greater activity spaceBack to article page