Fishery ViewImprovement of Time Series Line Chart Visualization of
Fishery Data
CPSC 533CFinal Presentation
Ying Zhang & Lan Wu
December 19th 2005
Background:
• Ecopath: Line chart system developed by UBC Fishery Department
No fish is an island
Motivation:
• Too many time series gathered• Curves overlapping and information
overload
Data:
• Focus: 45 fishes– The diet matrix (45 by 45 mat)– Their population at 648 discrete time points before and after fishing strategy applied (two 45 by 648 mat)
Task and Infovis Solution 1:• Task: Find the related fishes of a specific fish
• Solution: Brushing and highlighting
Task and Infovis Solution 2:• Task: Evaluate the effect of human’s fishing
• Solution: Difference graph
Task and Infovis Solution 3:• Task: Find the patterns fish populations match
• Solution: Clustering
High Level Implementation:
• Programming Platform: Visual Studio.Net
• Graphics Package: Zedgraph
• Clustering Algorithm– Distance Measure:
(Root Mean Square)
2 /rms i iD Y X M
Demo coming~
Unfinished/Future Work:
• Repeated Colors
• Overlapping reduced but still not eliminated
• Code Optimization
• More user interaction
Lessons learned:
• Understanding users’ preferences
• Developing based on an existing framework or using a visualization package
Thank you !
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