Updated Native Woody Vegetation Mapping of the NSW Wheat-belt VIS_ID 1629

"This map and report (cited below) present the results of research on the rate of change of native woody vegetation in the Central New South Wales wheatbelt. The study was carried out over three years and analysed vegetation change between the 1980s and 2000. ;\r\n;\r\nThe project tested methods to map changes in native woody vegetation using direct visual inspection of readily available Landsat TM satellite imagery. NPWS mapping of native woody vegetation types within the wheatbelt provided the 1980s baseline information for the study. Clearing was identified on the satellite images and digitised. The resulting clearing maps were used to produce updated maps of remaining native woody vegetation for each monitoring period.;\r\nSystematic validation of the mapping was done by comparison with specially flown, fine-scale aerial photography. Validation results showed that the mapping consistently and accurately distinguished between clearing and areas of no-change with typical accuracy rates of approximately 95%."

本地图及报告（如下文引述）呈现了新南威尔士州中部小麦带本土木本植被变化速率的研究成果。本研究历时三年，分析了20世纪80年代至21世纪初的植被变化情况。

本项目测试了通过直接目视检视易于获取的陆地卫星TM（Landsat TM）卫星影像，以绘制本土木本植被变化的方法。新南威尔士州国家公园与野生动物服务局（National Parks and Wildlife Service，NPWS）针对该小麦带内本土木本植被类型的测绘成果，为本研究提供了20世纪80年代的基线数据。研究人员在卫星影像中识别出植被清理区域并完成数字化处理，由此生成的清理地图被用于制作各监测时段剩余本土木本植被的更新地图。

本测绘工作通过与专门航拍的高分辨率航空摄影进行比对，完成了系统性验证。验证结果显示，该测绘方法能够稳定且精准地分辨植被清理区域与无变化区域，典型准确率约为95%。