Contour Based Visualization of Vessel Movement Predictions

Roeland ScheepensHuub van de Wetering

Jarke J. van Wijk

Project

• PhD Project of Roeland Scheepens (2011-2015)

– Visualization of heterogeneous and uncertain data in the maritime domain.

– Part of Metis project: http://www.esi.nl/metis/

– Supervisors:• Jarke J. van Wijk (TU/e)• Huub van de Wetering (TU/e)

Context

• Maritime Safety and Security Domain

• Law Enforcement

• Monitoring vessel traffic for suspicious behavior.

• Inspired by discussions at:– MOVE meeting hosted at Marin– MOVE Summer School and YRF 2011 – Dagstuhl Seminar 12512: Representation, Analysis and

Visualization of Moving Objects

Problem

• Intent of observed vessels not always clear

• When and where to use scarce resources or expensives responses, e.g.: Intercept, send Unmanned Aerial Vehicle (UAV)?

Observer

Suspicious vessel

?What is going

to happen?

Action

Observation

What to do?• Intercept• Send UAV• Nothing• ...

Prediction

• vessel position• Vessel interaction• ...

5

?

? ?? ?

?

? ?? ?

Attack?

Collision?

Decision Support

Prediction Models

Model I Model II

• Model provides time-dependant probability distributions.

• Position distribution for each .

Aggregated over

Prediction Visualization

• How to visualize such that an operator can see where a vessel is likely to be at what time?

Prediction Visualization

• is chance that vessel is inside contour.

• Contours are rendered for one or more for multiple periods or instances in time.

Contour

Time Period

Prediction Visualization

• A colored inner lining is added to identify the vessel.

• Haloes are used to separate contour lines.

Prediction Visualization

• Predictions further in the future fade to white due to their increased uncertainty.

Prediction Visualization

• When and where can the suspected pirate vessel attack the tanker?

?Where/when can the pirate attack

the tanker?

Prediction Visualization

• When and where can the suspected pirate vessel attack the tanker?

Conclusions

• Prediction of future vessel positions

• Prediction of future vessel interactions

• Give operator insight to support decision on what action to take

Future Work

• Visualization of uncertain vessel information

• Visualization of reasoning on vessel intent

• Common ground:– Uncertainty– Moving Vessels

References• Uncertainty Based Vessel Interaction Model for maritime safety and security systems

Roeland Scheepens, Huub van de Wetering, Jarke J. van WijkWorking with Uncertainty Workshop at IEEE VisWeek 2011

• Metis: Dependable cooperative systems for public safetyTeun Hendriks and Pierre van de LaarProc. Computer Science, 16(0):542 – 551, 2013, Conference on Systems Engineering Research

• Composite Density Maps for Multivariate TrajectoriesRoeland Scheepens, Niels Willems, Huub van de Wetering, Gennady Andrienko, Natalia Andrienko, Jarke J. van WijkIEEE Transactions on Visualization and Computer Graphics, vol. 17, no. 12, p. 2518-2527, 2011