The Dynamic Landcover Dataset of Australia

## **Abstract** \n\nThis dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied.\n\n\n\nThe Dynamic Land Cover Dataset of Australia is the first nationally consistent and thematically comprehensive land cover reference for Australia. It is the result of a collaboration between Geoscience Australia and the Australian Bureau of Agriculture and Resource Economics and Sciences, and provides a base-line for identifying and reporting on change and trends in vegetation cover and extent. Land cover is the observed biophysical cover on the Earth's surface, including native vegetation, soils, exposed rocks and water bodies as well as anthropogenic elements such as plantations, crops and built environments. Remote sensing data recorded over a period of time allows the observation of land cover dynamics. Different land cover types display distinct responses due to seasonal, climatic and anthropogenic drivers. Classifying these responses provides a robust and repeatable way of characterising land cover types. A key aspect of land cover is vegetation greenness. The greenness of vegetation is directly related to the amount of photosynthesis occurring, and can be measured as an index such as the Enhanced Vegetation Index (EVI). The Dynamic Land Cover Dataset presents land cover information for every 250m by 250m area of the country from April 2000 to April 2008. The classification scheme used to describe land cover categories in the Dynamic Land Cover Dataset conforms to the 2007 International Standards Organisation (ISO) land cover standard (19144-2). The Dynamic Land Cover Dataset shows Australian land covers clustered into 34 ISO classes. These reflect the structural character of vegetation, ranging from cultivated and managed land covers (crops and pastures) to natural land covers such as closed forest and sparse, open grasslands.\n\n## **Dataset History** \n\nThe source data for the Dynamic Land Cover Dataset is a time series of Enhanced Vegetation Index (EVI) data from the Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra and Aqua satellites operated by NASA. The time series includes 186 snapshots of vegetation greenness for each 250m by 250m area across the continent over an 8 year period from 2000 to 2008. Complete information on the creation of this product can be found in the following documents available from the Geoscience Australia website www.ga.gov.au/landcover.\n\n\n\nFurther information can be found at http://www.ga.gov.au/metadata-gateway/metadata/record/gcat_71071\n\n## **Dataset Citation** \n\nGeoscience Australia (2013) The Dynamic Landcover Dataset of Australia. Bioregional Assessment Source Dataset. Viewed 14 June 2018, http://data.bioregionalassessments.gov.au/dataset/b85713ee-5fa3-44a5-b145-25b01efa3e31.

**摘要**

本数据集及其元数据声明由第三方提交至生物区域评估计划（Bioregional Assessment Programme），此处严格按照原始提交版本予以呈现。

澳大利亚动态土地覆盖数据集（Dynamic Land Cover Dataset of Australia）是澳大利亚首个全国统一且主题覆盖全面的土地覆盖基准参考数据集。该数据集由澳大利亚地球科学局（Geoscience Australia）与澳大利亚农业与资源经济科学局（Australian Bureau of Agriculture and Resource Economics and Sciences）合作研制，可为识别并报告植被覆盖与范围的变化及趋势提供基准依据。

土地覆盖是指地球表面可观测到的生物物理覆盖物，包括原生植被、土壤、裸露岩石与水体，以及人工营造的人工林、农作物与建成环境等人为要素。通过长时间序列的遥感观测数据，可实现土地覆盖动态变化的监测。受季节、气候与人为驱动因素影响，不同土地覆盖类型会呈现出各异的响应特征。对这些响应特征进行分类，可为土地覆盖类型的表征提供一种稳健且可重复的方法。

植被绿度是土地覆盖的核心属性之一。植被绿度与光合作用强度直接相关，可通过增强型植被指数（Enhanced Vegetation Index, EVI）等指数进行量化表征。澳大利亚动态土地覆盖数据集覆盖澳大利亚全境每一块250米×250米的区域，提供了2000年4月至2008年4月期间的土地覆盖信息。

本数据集所采用的土地覆盖类别分类体系，符合2007年发布的国际标准化组织（International Standards Organisation, ISO）19144-2土地覆盖标准。澳大利亚动态土地覆盖数据集将全国土地覆盖划分为34个ISO标准类别，这些类别反映了植被的结构特征，覆盖范围从耕作与管理型土地覆盖（农作物与牧场）到自然土地覆盖（如封闭林与稀疏开阔草原）不等。

**数据集历史**

本数据集的源数据为美国国家航空航天局（National Aeronautics and Space Administration, NASA）运营的泰拉（Terra）与阿奎拉（Aqua）卫星搭载的中分辨率成像光谱仪（Moderate Resolution Imaging Spectroradiometer, MODIS）获取的增强型植被指数时间序列数据。该时间序列涵盖了2000年至2008年这8年间，澳大利亚全境每一块250米×250米区域的186帧植被绿度观测快照。

有关该产品研制的完整细节，可登录澳大利亚地球科学局官网www.ga.gov.au/landcover查阅相关文档。

更多详细信息可访问：http://www.ga.gov.au/metadata-gateway/metadata/record/gcat_71071

**数据集引用**

澳大利亚地球科学局（2013）：澳大利亚动态土地覆盖数据集，生物区域评估源数据集。检索于2018年6月14日，网址：http://data.bioregionalassessments.gov.au/dataset/b85713ee-5fa3-44a5-b145-25b01efa3e31。