Fig. 2
From: Map-based assessment of older adults’ life space: validity and reliability
Illustration of different possibilities to quantify life space by area-related life-space indicators from GPS data (blue) as well as from data collected with the map-based assessment (orange): left – convex hull; right – standard deviational ellipse. Map-based assessment data were weighted by the number of visits per location for calculation of the standard deviational ellipse