visualizing a city within a city — mapping mobility within a university campus
TRANSCRIPT
Visualizing a City within a City –
Mapping Mobility Within a University Campus
Dirk Ahlers, Kristoffer Gebuhr Aulie, Jeppe
Eriksen, and John Krogstie
BigDASC 13.10.15
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Background Work in the context of
Smart Cities Urban Computing Mobility Analysis Smart Mobility Visual Analytics
Campus Analytics
Campus Guide: MazeMap
Common project between Trådløse Trondheim A/S, Information department NTNU, Studieavdelingen, NTNU IT, NTNU Videre and IME NTNU
Cisco WLAN-positioning on Campus and in the City
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Campus as Living Lab
Applications Awareness of building use Learning and improving routes on campus Service locations Bottlenecks Connection to larger mobility Sustainable campus
Self-contained campus is functionally closed But: System Boundaries
Scale up to smart city infrastructures Member of ENoLL – European Network of Living Labs
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Infrastructure Setup
Mobility data with high spatial and temporal resolution
WLAN indoor coverage on campus Passive location sensing, WLAN trilateration Device positions as proxy for people’s
locations Sampling bias and double counting
addressed in future work for improved accuracy
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Data Set 1800 access points over 350000
sqm Tracking based on probe requests Data contains anonymized ID,
timestamp, coordinates, accuracy, derived hierarchy e.g. Gloshaugen > IT-Vest > 1.
etasje, Gloshaugen > Sentralbygg II > 13. etasje
43000 devices per day, 3.2 million positions
Lots of data cleaning necessary
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Stacked movement abstraction
Position Gathering Abstraction and processing layers
Data cleaning/preprocessing Movement Extraction Building-graph extraction
Visualization
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Exploratory analyses:
Heatmap of everything
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Building matrix
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Building trajectories
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Estimates are useful
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Accuracy issues
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Mobility vs Search
[Navigating MazeMap: indoor human mobility, spatio-logical ties and future
potential, IEEE, 2014]
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Conclusion Awareness and
planning support of building use
Real-time availability of rooms and facilities
Connection to larger mobility
Sustainable campus Scaling out
