2010 Index of Stream Condition - Water Body polygon features

The ISC2010_WATER_BODIES polygon features represent the areas of the stream bed that contained water at the time of the survey. Water body features less than 5m2 have been removed so that data volume is manageable.River condition in Victoria is assessed every 5 years using the Index of Stream Condition (ISC). The Department of Environment and Primary Industries (DEPI) developed a methodology to assess the Physical Form and Riparian Vegetation components of the ISC using remote sensing data, specifically LIDAR and aerial photography. A State Wide mapping project was undertaken in 2010-13 to accurately map the Physical Form and Riparian Vegetation metrics of the ISC . Other ISC metrics were not assessed in the project and were derived from other sources.The Physical Form and Riparian Vegetation Metric products are a combination of mapped Vector and Raster data as well as Tabular Summary Statistics about the mapped features. In the context of the project, the term Metrics is used to refer to both the mapped features and the summary statistics. Remote sensing data used includes 15cm true colour and infra-red aerial photography and four return multi-pulse LiDAR data. This source data was used to derive a variety of Raster data sets including Digital Terrain Models, Slope, Vegetation Height and Vegetation Cover. The Digital Terrain and Slope rasters were used to map Physical Form metrics including Stream Bed, Top of Bank and River Centre Lines while the Vegetation Height and Cover rasters were used to map the Riparian Vegetation metrics.The Project Report "Aerial Remote Sensing for Physical Channel Form and Riparian Vegetation Mapping" describes the remote sensing and mapping approach used to create this data set.

ISC2010_WATER_BODIES 多边形要素（polygon features）指代调查时段内存有水体的河床区域。为控制数据体量，面积小于5平方米的水体要素已被剔除。
维多利亚州的河流状况每5年通过河流状况指数（Index of Stream Condition, ISC）开展一次评估。环境与初级产业部（Department of Environment and Primary Industries, DEPI）研发了一套方法，借助遥感数据——激光雷达（LIDAR）与航空摄影——评估河流状况指数的物理形态与河岸植被两大组成部分。
2010至2013年，该州启动了一项全州制图项目，以精准绘制河流状况指数的物理形态与河岸植被指标（metrics）。本项目未覆盖其余河流状况指数指标，此类指标均来源于其他渠道。
物理形态与河岸植被指标产品整合了矢量数据（Vector）与栅格数据（Raster）的制图成果，以及针对制图要素的表格汇总统计信息。在本项目语境下，“指标（Metrics）”一词同时涵盖制图要素与汇总统计数据两类内容。
本项目所用遥感数据包含15厘米分辨率的真彩色与红外航空摄影，以及四次回波多脉冲激光雷达数据。基于上述源数据衍生出多类栅格数据集，包括数字地形模型（Digital Terrain Models）、坡度、植被高度与植被覆盖度。其中，数字地形与坡度栅格被用于绘制河床（Stream Bed）、岸顶（Top of Bank）与河道中心线（River Centre Lines）等物理形态指标，而植被高度与覆盖度栅格则被用于绘制河岸植被指标。
项目报告《用于物理河道形态与河岸植被制图的航空遥感》（"Aerial Remote Sensing for Physical Channel Form and Riparian Vegetation Mapping"）详细阐述了用于构建本数据集的遥感与制图技术方案。