Vegetation Formations and Classes of NSW (version 3.03 - 200m Raster) - David A. Keith and Christopher C. Simpson. VIS_ID 3848

This vegetation map shows the extant distributions of vegetation formations and classes throughout NSW, and provides users with information about the resolution, currency and uncertainties in the underlying data that were used to assemble the map. Data represents NSW native vegetation extent, compiled from various vegetation maps using methods outlined in Simpson et al. (2011) and in Keith and Simpson (2010). The NSW vegetation map (version 2.2, Keith and Simpson 2006) was revised by interpreting additional candidate maps as vector layers and synthesising these into a single raster-based data set. This involved eight steps: developing a comprehensive ‘standard’ classification of vegetation classes for NSW; collating and standardising the projection and format of candidate source maps; assigning vegetation units of source maps to NSW vegetation classes; assessing the spatial resolution, currency and reliability of candidate source maps; assembling a composite map from candidate source maps to maximise reliability; applying a spatial mask to represent extant native vegetation; adjusting spatial resolution by dissolving small polygons and converting to 200 m raster; attributing the spatial resolution, currency and reliability of the underlying source data sets. The classification of 106 vegetation classes described by Keith (2004) was adopted as the framework for preparation of version 3.03 of the NSW vegetation map. Polygons from the “Estuarine macrophytes CCA” dataset of less than 0.1 ha were eliminated. For all other datasets polygons of less than 2 ha were eliminated. The map incorporates data from a statewide woody vegetation mask from the NSW Woody Vegetation Change Detection Program (Kitchen et al. 2010). The map is presented as a raster within an ESRI ArcGIS (9.3) geodatabase. Supersedes Keith and Simpson (2006), Keith (2004) and Pressey et al. (2000). Pressey et al. (2000) was the native veg extent product used to calculate native veg cover values for the Over-Cleared Landscapes Database prior to July 2006. References: Keith D. A. (2004) Ocean Shores to Desert Dunes: The native vegetation of New South Wales and the ACT. Department of Environment and Conservation, Sydney. Keith, D. A. and Simpson, C. C. (2010) Vegetation Formations of NSW (version 3.0): A seamless map for modelling fire spread and behaviour. Report to the Rural Fire Service. NSW Department of Environment and Climate Change. October 2010. Keith, D. A. and Simpson, C. C. (2006). A protocol for assessment and integration of vegetation maps, with an application to spatial data sets from south-eastern Australia. Austral Ecology 33, 761–774. Pressey, R.L., Hager, T.C., Ryan, K.M., Schwarz, J., Wall, S., Ferrier, S. and Creaser, P.M. (2000). Using abiotic data for conservation assessments over extensive regions: quantitative methods applied across New South Wales, Australia. Biological Conservation 96, 55-82

本植被地图展示了新南威尔士州（NSW，New South Wales）全境现存的植被群系与植被类群分布现状，并为使用者提供了用于编制该地图的基础数据的分辨率、现势性与不确定性相关信息。本数据集涵盖新南威尔士州原生植被分布范围，基于多份植被地图，采用Simpson等人（2011年）以及Keith与Simpson（2010年）所述方法整合编制而成。
本新南威尔士州植被地图（2.2版本，Keith与Simpson，2006年）经修订完成：将额外的候选地图以矢量图层形式进行解译，并将其合成为单一的栅格数据集。本次修订共包含八个环节：其一，为新南威尔士州建立一套完整统一的‘标准’植被分类体系；其二，整理并标准化候选源地图的投影坐标系与数据格式；其三，将源地图中的植被单元匹配至新南威尔士州植被类群；其四，评估候选源地图的空间分辨率、现势性与可靠性；其五，整合多份候选源地图以生成复合地图，最大化数据可靠性；其六，应用空间掩码以标识现存原生植被分布；其七，通过融合小多边形并转换为200米分辨率栅格，调整空间分辨率；其八，为基础源数据集标注其空间分辨率、现势性与可靠性属性。
本3.03版本新南威尔士州植被地图的编制框架，采用了Keith（2004年）所描述的106个植被类群分类体系。‘河口大型植物CCA’数据集中面积小于0.1公顷的多边形将被剔除，其余数据集内面积小于2公顷的多边形亦予以剔除。
本地图整合了来自新南威尔士州木本植被变化检测项目（NSW Woody Vegetation Change Detection Program）的全州木本植被掩码数据（Kitchen等人，2010年）。本地图以栅格形式存储于ESRI ArcGIS（9.3）地理数据库中。
本数据集取代了Keith与Simpson（2006年）、Keith（2004年）以及Pressey等人（2000年）的相关成果。2006年7月之前，用于计算‘过度开垦景观数据库’原生植被覆盖值的原生植被范围产品，正是Pressey等人（2000年）的成果。
参考文献：
1. Keith D.A.（2004年）《从海岸沙丘到荒漠沙丘：新南威尔士州与澳大利亚首都领地的原生植被》，新南威尔士州环境与保育部，悉尼。
2. Keith D.A.与Simpson C.C.（2010年）《新南威尔士州植被群系（3.0版本）：用于火灾蔓延与行为模拟的无缝地图》，提交给乡村消防局的报告，新南威尔士州环境与气候变更部，2010年10月。
3. Keith D.A.与Simpson C.C.（2006年）《植被地图的评估与整合协议：兼论澳大利亚东南部空间数据集的应用》，《澳大利亚生态学》，第33卷，第761–774页。
4. Pressey R.L.、Hager T.C.、Ryan K.M.、Schwarz J.、Wall S.、Ferrier S.与Creaser P.M.（2000年）《在广域区域利用非生物数据开展保护评估：应用于澳大利亚新南威尔士州的定量方法》，《生物保护》，第96卷，第55–82页。