On the usefulness of very high resolution IKONOS satellite imagery for vegetation mapping

摘要: Traditional vegetation mapping methodologies consist primarily of field surveying and from aerial photographs or high resolution satellite images. Previous applications imagery for this task (e.g. Landsat TM SPOT HRV) have not always been successful, as such proved to limited spatial resolution. Since 2000 a number very commercial satellites launched IKONOS, Quickbird some extent 5), typically producing images with 4-5 meters in multispectral mode (3-4 bands the visible – near-infrared range) 1 meter panchromatic mode. 2 0.5 m is expected be available next few years. These new datasets open up potentials detailed mapping. The usefulness demonstrated through examples on-going projects at School Surveying (University Otago). • conservation New Zealand’s native fauna requires greater understanding mammal pest movements relation landscape features. Such information helps optimise trap placement, increase catch rate, support habitat manipulation discourage predators access breeding sites. first example will demonstrate how maps produced IKONOS accurate GPS location data animals can combined analyse fine-scale use pests. In Zealand about 30% faults on electrical transmission lines are caused by trees. Utility companies spend large amounts money maintaining clear distance between power vegetation. second show help assess risk encroachment line corridors. tree clumps, identification species height may predict hot-spots potential network.