Geomorphology of Victoria

This dataset provides a hierarchical framework of geomorphological spatial entities at three tiers (Tier 1 represents the coarsest scale, Tier 3 representing the finest scale). Over the last decade in Victoria, geomorphology has been used to create a hierarchical classification of landforms and landscapes, known as the Victorian Geomorphology Framework (VGF). The VGF is a spatial framework consisting of a hierarchical system of land unit descriptions. The framework hierarchy is a spatial system to assist planning, monitoring and reporting for natural resource management in Victoria and Australia. The VGF describes and defines details of Victorias landscapes and provides a hierarchy to align past and future soil and land information. The upper level (Tier 1) has 8 Divisions and approximates to a scale of 1:1 000 000 to 5 000 000. Tier 2 has 34 categories, approximating to a scale of 1:500 000 to 2 000 000 while Tier 3 has 95 categories approximating to a scale of 1:100 000 to 500 000. Many of the boundaries are derived from the aggregation of soil-landform units/land systems, forming a hierarchical land type, particularly in relation to landform.\n\nThe GMU250 layer includes soil erosion susceptibility assessments sourced from soil information contained in underlying regional studies which have been developed at regional scales of 1:100 000 or finer. The regional Land Resource Assessment (LRA) mapping at 1:100 000 scale effectively equates to the fourth tier of GMU mapping detail. As these units have been scaled up for use at the third tier, i.e. GMU250, it has meant a degree of generalisation across the LRA units. In these cases the dominant soil type, based upon maximum spatial extent, has been used for the susceptibility assessments.\n\nMore information on the geomorpohology of Victoria can be found on Victorian Resources Online (http://vro.depi.vic.gov.au/dpi/vro/vrosite.nsf/pages/landform_geomorphology#mapping).\n\n\nDOI 10.4226/92/58e6f2752cfd6该数据集提供了一个包含三个层级的地貌空间实体层次框架（Tier 1代表最粗尺度，Tier 3代表最细尺度）。过去十年间，维多利亚州利用地貌学构建了一套土地形态与景观的层次分类体系，即维多利亚地貌框架（Victorian Geomorphology Framework，VGF）。VGF是一个由土地单元描述层次系统组成的空间框架，其层次结构可辅助维多利亚州及澳大利亚自然资源管理的规划、监测与报告工作。VGF描述并定义了维多利亚州景观的细节，提供了整合过去与未来土壤及土地信息的层次结构。上层（Tier 1）包含8个分区，比例尺约为1:1000000至1:5000000；Tier 2包含34个类别，比例尺约为1:500000至1:2000000；Tier 3包含95个类别，比例尺约为1:100000至1:500000。许多边界源自土壤-土地单元/土地系统的聚合，形成了与地貌相关的层次化土地类型。 GMU250图层包含土壤侵蚀敏感性评估数据，这些数据来源于区域尺度（1:100000或更精细）的基础区域研究中的土壤信息。1:100000比例尺的区域土地资源评估（Land Resource Assessment，LRA）制图实际上相当于GMU制图细节的第四层级。由于这些单元被放大用于第三层级（即GMU250），因此需要对LRA单元进行一定程度的概括。在此情况下，基于最大空间范围的优势土壤类型被用于敏感性评估。 关于维多利亚州地貌的更多信息可在维多利亚资源在线网站查询（http://vro.depi.vic.gov.au/dpi/vro/vrosite.nsf/pages/landform_geomorphology#mapping）。 DOI 10.4226/92/58e6f2752cfd6