VAST Challenge 2008 Participant Workshop

Migrant Boats Mini-Challenge Summary

VAST Challenge 2008 Participant Workshop

Sunday Oct 19, 2008(draft slides included in DVD distributed to participants)

VAST Challenge 2008 Participant Workshop

Migrant Boats Mini Challenge

• Dataset– Logs of landings or interception by Coast Guard– Launch point / landing point / type of vessel / date /

passengers / whether or not intercepted

• Questions– Describe pattern of landing and interdictions and how

they change over time?

• Ground Truth– Straight forward. No real trap but risk of misjudging

relative importance of certain things

VAST Challenge 2008 Participant Workshop

VAST Challenge 2008 Participant Workshop

VAST Challenge 2008 Participant Workshop

Map or no map?

Grid with lat/long coordinates (Beijing team)

Many used Google EarthSome: own GISSome: no map, or optional.

Nevac could move insert (e.g Mexico area) closer for more compact map.

(CMU team)

(U of Singapore team)

(U of Illinois team)

VAST Challenge 2008 Participant Workshop

Grouping and clustering

(Spadac team)

(Parvac – U of Wash. team)

VAST Challenge 2008 Participant Workshop

Aggregation (and dealing with overlap)

(Parvac – U. of Wash. team) Aggregation by regionX axis is region, e.g. L5 = Mexico

(Oculus team) Irregular areaAggregation on the map itself

VAST Challenge 2008 Participant Workshop

Representing Time

• Animation– Those who relied solely on animation missed the large number

of Mexico landings (they overlapped in a very small area)

• Timelines

(VSTI Prajna team)

VAST Challenge 2008 Participant Workshop

Representing Time

• 3D

(Tacc team)

VAST Challenge 2008 Participant Workshop

• Hybrid 2d-3d (projection)

Representing Time

(Oculus team)

VAST Challenge 2008 Participant Workshop

Symbol used on the map

Dots (CORE team) Lines (Tacc team)

Centroid (Tacc team)

(Spadac team) Arrows (drawn by hand!)

VAST Challenge 2008 Participant Workshop

Coordinated displays

GET COMVIS EXAMPLE

(Zagreb/VrVis/VTech team)

(Palantir team)

Simple and Effective Integrated Display Award

VAST Challenge 2008 Participant Workshop

Search

(PNNL Core team)

VAST Challenge 2008 Participant Workshop

Analysis support

• Many merely report numbers

• Some make hypotheses

• Few provide some analysis and reporting support

• Analysis Summary Award to Spadac team (read it!)

(Oculus team)

VAST Challenge 2008 Participant Workshop

Thoroughness of analysis

(Tacc team) X is time, Y latitudeBlack lines are coast guard patrol traces)

• Some teams provided the minimum answers • Other looked at the data in a very thorough fashion looking at every angles of the data (e.g. Palantir team).• Few gave suggestions: better patrolling areas for Coast Guard

VAST Challenge 2008 Participant Workshop

• Periodic patterns– There were clear seasonal patterns

• Names of passengers– Tells where Paraiso members landed

Thoroughness of analysis