Fishery View Improvement of Time Series Line Chart Visualization of Fishery Data

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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