Pilleriine Kamenjuk Anto Aasa Importance of the subject Widen the - PowerPoint PPT Presentation

Changes in sizes of daily activity spaces and change of residence according to mobile positioning data The case of Estonia Pilleriine Kamenjuk Anto Aasa

Importance of the subject • Widen the concept of migration and travel behaviour. • Longitudinal data – new analysis on new levels. • Differences in spatial mobility.

Migration • Change of residence from one area to another crossing municipal or country borders. • More dynamic approach needed. • Migration as everyday practice (Halfacree, 2012; Ho & Hatfield, 2011). • Home as a centre of gravity (Hägerstrand, 1970; Roseman, 1971).

Activity spaces • Activity space approach (Colledge & Stimson, 1997; Newsome, 1998). • Everyday activities and individual movement between them – home, work, leisure. • Interconnectedness of change of residence and everyday mobility.

Aim of the study • Develop a methodology. • Give an estimation on the size of actual activity spaces of Estonians (year 2011). • Research questions: – Does the activity space of movers differ from those who stayed put? How does it vary with different socio- demographic groups? Settlemet hierarchy? – Does the change in residence affect the size of the activity space?

Data and method (1) • Passive mobile positioning data, anchor point model (Ahas et al., 2010). • Change in residence – permanent change in home anchor point. – Criterias: distance, character of the move.

Data and method (2) • Estimation of the sizes of activity spaces. – Actual, regularly visited (measured/positioned) locations. – Size of the activity space – activity ellipses (standard deviational ellipse – ArcMap), buffers. – Socio-demographic variables, levels of settlement hierarchy. • Statistical analysis: Kruskal- Wallis, Duncan’s multiple range test.

1 anchor point activity spaces

2 anchor points activity spaces

3 and more anchor points activity spaces

Activity spaces of … • movers • non-movers • Mean 1715 km 2 , • Mean 706 km 2 , median median 409 km 2 . 109 km 2 . • Men (23%) > women • Men (47%) > women • Estonians (51%) > • Estonians (44%) > Russians Russians • With age the size of activity space decreased. • Settlement hierarchy – towns and their hinterland, rural areas.

Change in residence and the size of activity spaces • Change in residence had no impact on the size of activity spaces. • Particular directions: – City and its proximate hinterland (change of home anchor point less than 30 km). – Distant hinterland (30 – 100 km).

Conclusions • Alternative method for measuring migration. Mapping interconnections between change of residence and everyday space usage. – Differences in sizes of activity spaces. – Movers had overall bigger activity spaces than non- movers. – Change of residence had no impact on the size of activity space. • Critics: – Ellipses are sensitive to locations of activities in space and distances  is there any better approach? – Add more variables to the ellipses and buffers . – Add more socio-demographic variables.

Thank you! pillerii@ut.ee Supported by the Tiger University Program of the Information Technology Foundation for Education