Tree canopies 2019

This dataset contains spatial polygons which represent tree canopy areas across the City of Melbourne. It can be easily mapped using the geometry column. Tree canopy polygons have been derived by ArborCarbon from high-resolution airborne multispectral imagery. ArborCarbon collected this imagery using the ArborCam, a unique 11-band airborne multispectral camera system optimized for the accurate detection of vegetation and subtle changes in vegetation condition. The high-resolution airborne imagery datasets were geometrically corrected and orthorectified using the City of Melbourne’s publicly available 2018 aerial imagery and a Digital Terrain Model supplied by the City. A Digital Surface Model was generated from the acquired imagery for the full extent of the City, enabling the stratification of vegetation into a range of height categories. All vegetation >3m above the ground was classified as canopy (excluding vegetation on building rooftops).

该数据集包含代表墨尔本市全域树木冠层区域的空间多边形，可通过几何列（geometry column）轻松映射。树木冠层多边形由ArborCarbon公司基于高分辨率机载多光谱影像（airborne multispectral imagery）生成。ArborCarbon使用ArborCam（一款独特的11波段机载多光谱相机系统，专为精准检测植被及植被状况的细微变化而优化）采集了该影像。高分辨率机载影像数据集利用墨尔本市公开可用的2018年航空影像及该市提供的数字地形模型（Digital Terrain Model）进行了几何校正与正射纠正。基于采集的影像，为墨尔本市全域生成了数字表面模型（Digital Surface Model），从而可将植被按高度分层为多个类别。所有地面以上高度超过3米的植被均被归类为冠层（不包括建筑物屋顶上的植被）。