[其它] 3D Forests Show the Way for Sustainable Future

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发表于 2011-10-21 16:07:00 |只看该作者 |倒序浏览

         State-of-the-art GIS technology which can  create highly detailed 3D maps of entire forests is set to overhaul Australia’s  $2.5 billion forestry industry, according to one of the nation’s leading spatial  professionals.





         The technology, from location intelligence  specialists Esri Australia, was on display at SilviLaser 2011, an annual  showcase of LiDAR, or light detection and ranging, technology and its  applications in forestry.





         Esri Australia Senior Consultant Gordon  Sumerling, who presented on LiDAR at Ozri 2011 last week, said new advances in  GIS technology would ensure Australia’s commercial forests remain sustainable  and renewable, and are managed in line with the world's highest environmental  standards.





         “Forestry is a vital industry in Australia,  which has a total forested area of around 150 million hectares – which covers  around 21% of our continent,” Mr Sumerling said.





         “GIS, when combined with traditional  technologies such as LiDAR, can vastly improve critical industry tasks such as  assessing forest health, calculating biomass, and identifying drainage patterns  and terrain types.





         “The 3D maps generated by GIS can enable users  to see intricate forest detail such as where and how dense various canopy layers  are, and the characteristics of ground level biomass.





         “The images also provide a detailed view of  topographical changes, which will save an enormous amount of time in terms of  hauling loads and positioning machinery.





         “This level of insight will be critical in the  ongoing sustainable management of our forests.”





         LIDAR uses light beams fired from a plane to  measure tree and canopy height and terrain.





         Mr Sumerling said the Esri Australia’s GIS  technology – particularly the soon-to-be-released ArcGIS 10.1 software –  transformed raw LiDAR data into 3D maps of the landscape that provided  significantly more detail than traditional aerial photographs.





         “Aerial photographs only provide views of the  actual tree tops, whereas LiDAR can penetrate those and other layers down to the  forest floor,” Mr Sumerling said.





         “However, in the past LiDAR could only produce  simple, 2D images that were mostly useful only to highly trained  technicians.





         “GIS technology combines multiple 2D LiDAR  images and creates highly detailed 3D maps that provide an extremely accurate  picture of what forests actually look like – right down to the level of rocks  and shrubs on the forest floor.


         “This allows non-technical users to get an  understanding of the forest floor and tree and canopy heights over vast areas,  streamlining decision-making processes while also making them more accurate and  informed.”





         Mr Sumerling said SilviLaser 2011 was the  first time the ArcGIS 10.1 LiDAR applications had been exhibited to Australia’s  forestry industry.





         “Senior forestry figures have been genuinely  amazed by the 3D maps this technology is producing and how it has transformed  relatively indecipherable raw data,” Mr Sumerling said.





         “They can see the potential this technology  has in the industry to revolutionise critical forestry management activities  such as biodiversity, fertilisation, harvesting, cultural heritage and  development.”





         “It’s a very exciting time for Australia’s  forestry industry.”