NU Taxon Update_Sept 2005

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Napier Update May-Sept 2005

• Produced TCS Data Sets for multiple taxonomy visualisation
• Kopersky Moss (14 * 10-10,000 taxa & species)
• MANIS (15 * 1,000-9,000 taxa & species)
• ITIS (7 * 200,000-250,000 taxa)
• ITIS TCS XML file huge for seven entire hierarchies - 650MB
• Unwieldy for large data sets?
• Takes 2.5 minutes to read in and parse (slightly faster with StAX v SAX parser) and uses 350MB+ memory
• Two pass parsing uses less memory but 4 minutes to parse

• Additions/Refinements to visualisation
• Ability to find uniquely named taxa out of a set of classifications
• Speeded up large tree comparisons - 2.5s to find classification structural changes
• Simple hash functions to reference names across classifications reduce memory footprint for sparser datasets without detriment to speed