Drainage Catchment Digital Elevation Model Collection

The Drainage Catchment Digital Elevation Model (DEM) collection includes DEMs created by Geoscience Australia using open elevation data sourced from the Elvis Elevation and Depth system. The drainage catchment DEMs provide a regional product filling the gap between localised high resolution tiled data and the national low resolution mosaic provided by the 1-second Shutte Radar Topographic Mission dataset. The drainage catchment DEMs fill a critical gap, providing data to support efficient planning, research and decision-making by government, industry, and research communities. DEMs for available drainage catchments are delivered as a mosaicked product in raster format. Metadata for each drainage catchment is supplied in word document and shapefile format. The shapefile enables users to inspect metadata in a Geographic Information System.Value: Data used at regional scales to represent and provide understanding of ground surface topography. Supply of models as a single file allows easier use and wider uptake, for example in assessments of water movement through the landscape or the potential movements of fires. Provide access to all Drainage Catchment Digital Elevation Models through a single record.

流域数字高程模型（Digital Elevation Model, DEM）数据集合集包含由澳大利亚地球科学局（Geoscience Australia）基于从Elvis高程与深度系统获取的公开高程数据生成的DEM数据。该流域DEM作为区域级产品，填补了本地化高分辨率分幅数据与1秒航天飞机雷达地形测绘任务（Shuttle Radar Topography Mission）数据集所提供的国家级低分辨率镶嵌数据之间的空白。此类流域DEM填补了一项关键空白，可为政府、行业及科研群体的高效规划、研究与决策提供数据支撑。现有流域的DEM以镶嵌后栅格格式交付。每个流域的元数据均以Word文档与形状文件（shapefile）格式提供。借助形状文件，用户可在地理信息系统（GIS）中查看元数据。数据集价值：可在区域尺度上表征并辅助理解地表地形。将模型以单个文件形式交付，可降低使用门槛并扩大应用范围，例如用于景观内水流运动评估或火灾潜在蔓延路径分析。通过单条记录即可获取全部流域数字高程模型数据。