Infrastructure Engineering - Research Publications
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ItemObject-based classification of ikonos imagery for mapping large-scale vegetation communities in urban areas(MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL-MDPI, 2007-11)Effective assessment of biodiversity in cities requires detailed vegetation maps.To date, most remote sensing of urban vegetation has focused on thematically coarse landcover products. Detailed habitat maps are created by manual interpretation of aerialphotographs, but this is time consuming and costly at large scale. To address this issue, wetested the effectiveness of object-based classifications that use automated imagesegmentation to extract meaningful ground features from imagery. We applied thesetechniques to very high resolution multispectral Ikonos images to produce vegetationcommunity maps in Dunedin City, New Zealand. An Ikonos image was orthorectified and amulti-scale segmentation algorithm used to produce a hierarchical network of image objects.The upper level included four coarse strata: industrial/commercial (commercial buildings),residential (houses and backyard private gardens), vegetation (vegetation patches larger than0.8/1ha), and water. We focused on the vegetation stratum that was segmented at moredetailed level to extract and classify fifteen classes of vegetation communities. The firstclassification yielded a moderate overall classification accuracy (64%, κ = 0.52), which ledus to consider a simplified classification with ten vegetation classes. The overallclassification accuracy from the simplified classification was 77% with a κ value close tothe excellent range (κ = 0.74). These results compared favourably with similar studies inother environments. We conclude that this approach does not provide maps as detailed as those produced by manually interpreting aerial photographs, but it can still extract ecologically significant classes. It is an efficient way to generate accurate and detailed maps in significantly shorter time. The final map accuracy could be improved by integrating segmentation, automated and manual classification in the mapping process, especially when considering important vegetation classes with limited spectral contrast.
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ItemA preliminary artificial intelligence model for predicting the risk from glass windows subject to airblast overpressure(Construction Publishing House, 2007)
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ItemThe use of long term contracts to stimulate innovation and long term maintenance of Public Infrastructure(Construction Publishing House, 2007)
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ItemTowards the Next Generation of Rural Water Demand Modelling(MODELLING & SIMULATION SOC AUSTRALIA & NEW ZEALAND INC, 2007)
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ItemBar News salutes a true friend to the profession( 2007)Litigious clients are a boon to the legal profession.
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ItemThe reasonable woman: life catches up with art: fact is stranger than fiction( 2007)The issue of whether there exists "a reasonable woman" within our legal system is considered.
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ItemHistory as a learning aid( 2007)Several anecdotes comparing political, military, and realistic objective assessments of military gains.
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Item[Review of the book Arsenals of folly: the making of the nuclear arms race]( 2007)This book looks at the consequences of the end of the "cold war" with the collapse of communism and the USSR at the close of the 20th century and the Russian decision to discontinue participating in the "arms race".
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ItemVale Word 5.1a (November 4, 1992 - April 8, 2004) and Word 5 (December 2, 1991 - April 8, 2004)( 2007)The author comments on the decision by Microsoft to remove the option in its current word processing program to save the file in the older version 5 format and compares the older “user friendly” version with later and the current Microsoftword processing programs.
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ItemTrajectory Plotting System and Users Manual for use with Windows based Personal Computer( 2007)The computer program is a Microsoft Windows application in the Delphi programming language and is expected to run on Windows 95 / 98 / ME / 2000 / 2003 / XP. It requires about 5 Mb of hard disc space.
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