Pre-European vegetation in Western Australia

The pre-European type vegetation dataset builds on the vegetation map database
developed over the past 14 years by G.R. Beeston and A.J.M. Hopkins which is
based on 1:250,000 scale mapping.
A total of 819 vegetation types is recognised in Western Australia. These are
considered to be Association-level units, for the purposes of edge-matching and
comparing data from other States and Territories. These Vegetation Associations
range from tall forests, through a wide variety of forests and woodlands, shrublands
and grasslands, mostly with an overstorey of trees.
The pre-European vegetation type and present extent datasets were intersected in
order to develop a surrogate dataset on present vegetation type and extent. (ref: http://www.agric.wa.gov.au/objtwr/imported_assets/content/lwe/vegt/tr249_part1.pdf)

前欧洲殖民时期植被类型数据集基于G.R.比斯顿（G.R. Beeston）与A.J.M.霍普金斯（A.J.M. Hopkins）耗时14年构建的植被地图数据库，该数据库采用1:250000比例尺制图。
西澳大利亚州共计识别出819种植被类型。为满足跨州及领地数据的接边匹配与对比需求，上述类型均被划定为群丛级（Association-level）单元。此类植被群丛（Vegetation Association）涵盖高大森林，以及种类丰富的森林、疏林、灌丛与草原，多数以乔木层为优势上层结构。
为构建当前植被类型与分布范围的替代数据集，研究团队将前欧洲殖民时期植被类型数据集与当前植被分布范围数据集进行了空间叠加分析。（参考文献：http://www.agric.wa.gov.au/objtwr/imported_assets/content/lwe/vegt/tr249_part1.pdf）