Physiographic Regions of Australia

The Physiographic Regions of Australia (Pain, Gregory, Wilson and McKenzie 2011) are a modification of those compiled by Jennings and Mabbutt (1977), and are based on a visual interpretation of landforms as expressed on the Shuttle Radar Terrain Mission (SRTM) digital elevation model (DEM). Apart from its descriptive role, a map of physiographic regions provides a regional system of reference for geomorphological and related physical geographical accounts. Through the groupings of physiographic regional characteristics at different levels, the action of underlying controls, for instance geologic or climatic, may be made apparent. Further, the map can provide a regional basis for an understanding of land characteristics that are dependent upon landforms, for example the distribution of soils or natural vegetation. Jennings J.N. and Mabbutt J.A. (1977) Physiographic outlines and regions. In 'Australia, a geography. Volume 1. The natural environment.' (Ed. DN Jeans) (Sydney University Press: Sydney).\nLineage: The Physiographic Regions were digitized or scanned from line work on 1:1 000 000 maps of elevation (SRTM 90m), shaded with an illumination in the NW. Lines were drawn onto the maps (with 4B pencils), by comparing the original lines of Jennings and Mabbutt and the landform patterns that could be seen in the SRTM hill shaded data. State and territory agencies provided corrections and updates to this initial line work, which were also digitized. Line work in Western Australia has been altered significantly, so that it approximates to an aggregation of the state soil landscape survey boundaries.\nThe 1:100 000 Geoscience Australia Coastline (2004) has been used, rather than state specific line work, to provide national consistency. Attributes within the accompanying database were attached to the polygons via the region_id.\n-------------------\nPositional Accuracy: \nThe nominal scale of this dataset is 1:2 500 000\n-------------------\nAttribute Accuracy\nAttribute accuracy is consistent across the dataset. Polygon ID's were used to join attribute data that was entered and managed in an Access database. ID's, names and descriptions have been checked for accuracy and consistency. Regolith materials are a concatenation of 3 materials listed in the database, including proportions.\n-------------------\nLogical Consistency\nThe spatial dataset has been checked for overlaps and gaps, and correct labelling.\n-------------------\nCompleteness\nThe dataset coverage is complete for the whole of continental Australia.

澳大利亚地貌区域（Physiographic Regions）由Pain、Gregory、Wilson与McKenzie于2011年修订，其原型为Jennings与Mabbutt（1977）编制的地貌区域方案，基于对航天飞机雷达地形测绘任务（Shuttle Radar Terrain Mission, SRTM）数字高程模型（Digital Elevation Model, DEM）所呈现地貌的目视解译。该地貌区域图除具备描述性功能外，还可为地貌学及相关自然地理研究提供区域性参考体系。通过不同层级的地貌区域特征聚类，诸如地质、气候等下伏控制因素的作用可得以明晰。此外，该图可作为理解依赖于地貌的土地特征（如土壤或天然植被分布）的区域基础。

Jennings J.N. 与 Mabbutt J.A.（1977）《地貌轮廓与区域》，收录于《澳大利亚地理学 第一卷：自然环境》（DN Jeans 主编）（悉尼大学出版社，悉尼）。

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数据集溯源：本地貌区域矢量数据系从1:1 000 000比例尺高程图（SRTM 90m分辨率）的线划要素数字化或扫描得到，该图采用西北方向光照晕渲。制作人员通过比对Jennings与Mabbutt的原始线划及SRTM晕渲地形数据中可见的地貌格局，使用4B铅笔在底图上绘制区域界线。澳大利亚各州及领地机构对初始线划成果进行了校正与更新，并完成了数字化处理。其中西澳大利亚州的线划成果经过大幅调整，以近似聚合该州土壤景观调查的边界。

本次制图采用1:100 000比例尺的澳大利亚地球科学局（Geoscience Australia）海岸线数据（2004）而非各州专属线划，以保障全国范围的一致性。附属数据库中的属性信息通过region_id字段关联至各多边形要素。
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位置精度：
本数据集的标称比例尺为1:2 500 000
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属性精度
全数据集属性精度保持一致。多边形ID用于关联在Access数据库中录入与管理的属性数据。已对ID、名称及描述信息进行准确性与一致性核查。残积物（regolith）材料字段由数据库中列出的3种材料及其占比拼接而成。
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逻辑一致性
已对本空间数据集进行重叠、间隙及标注正确性检查。
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完整性
本数据集覆盖澳大利亚全部大陆领土，无缺失。

搜集汇总

背景与挑战

背景概述

该数据集为澳大利亚的地貌区域图，基于SRTM数字高程模型的视觉解释，覆盖整个澳大利亚大陆，用于地貌学和相关物理地理学研究。