Digital Boswijzer Flanders 2012

De Boswijzer is a land cover map of forest. De Boswijzer defines forest on the basis of the following criteria: (a) forest area at least 0.5 ha, (b) length/width ratio at least 2.5 and (c) closure at least 50 %. This definition differs from the legal definition in the Forest Decree. The Boswijzer can therefore not be used as the only source to determine whether what is serrated as a forest on the Boswijzer is also forest according to the definition ‘forest’ from the Bosdecreet.The Boswijzer is not used for determining the forest area in Flanders. For this purpose, the Flemish forest inventory is used to identify the land use forest.With the Boswijzer, a forest mapping new style, we work with digital aerial photography with very high resolution images that can be processed automatically. Commissioned by the Agency for Nature and Forest (ANB), team Services of the Information Flanders Agency (AIV) carried out a segmentation classification of the mid-scale summer flight orthophotos from 2012 to realise the digital Boswijzer.De Boswijzer是一款森林土地覆盖制图产品。其对森林的定义基于以下三项标准：(a) 林地面积不小于0.5公顷；(b) 长宽比不小于2.5；(c) 郁闭度不低于50%。该定义与《森林法令》（Forest Decree）中的法定定义存在差异，因此无法仅依托De Boswijzer判定其中被标记为森林的区域，是否符合《森林法令》中"森林"的定义。De Boswijzer并未用于统计法兰德斯地区的森林总面积，该类用途需采用法兰德斯森林清查（Flemish forest inventory）来识别林地用地类型。作为新一代森林制图方案，De Boswijzer采用可自动化处理的超高分辨率数字航空摄影影像开展作业。受自然与森林署（Agency for Nature and Forest, ANB）委托，法兰德斯信息署（Information Flanders Agency, AIV）的服务团队对2012年夏季航拍的中等比例尺正射影像开展分割分类工作，以制作数字版De Boswijzer。