2010 Index of Stream Condition - River Centre Lines at the 100 Section Level

The ISC2010_RIVER_CENTRELINE_S line features represent the set of river reaches that are assessed in the 2010 ISC. This data set is a version of the ISC2010_RIVER_CENTRELINE_R data set where each Reach is divided into 100m Sections. Each 100m Section has Metric Statistics assessed and recorded in Section Summary (_S) Tabes. The ISC2010_RIVER_CENTRELINE_S is designed to JOIN to all ISC2010__S tables.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_RIVER_CENTRELINE_S线要素集代表了2010年溪流状况指数（Index of Stream Condition，ISC）评估范围内的全部河段集合。该数据集是ISC2010_RIVER_CENTRELINE_R数据集的衍生版本，其将每个河段均划分为100米的分段；每个100米分段均配有经评估的度量统计指标，并记录于分段摘要（_S）表中。ISC2010_RIVER_CENTRELINE_S数据集设计用于与所有ISC2010__S表进行关联连接。维多利亚州每5年便会借助溪流状况指数（ISC）对河流状况开展评估。环境与初级产业部（Department of Environment and Primary Industries，DEPI）研发了一套方法，依托遥感数据——尤其是激光雷达（LiDAR）与航空摄影——对ISC的物理形态与河岸植被组分开展评估。2010至2013年间，项目组实施了一项全州范围制图工程，以精准绘制ISC的物理形态与河岸植被度量指标。本项目未对其余ISC度量指标进行评估，相关数据源自其他渠道。物理形态与河岸植被度量产品由矢量（Vector）、栅格（Raster）制图数据，以及针对制图要素的表格摘要统计数据共同组成。在本项目语境中，“度量指标”一词同时指代制图要素与摘要统计数据。所用遥感数据包含15厘米分辨率真彩色与红外航空摄影，以及四返回多脉冲激光雷达（LiDAR）数据。依托该源数据可衍生出多种栅格数据集，涵盖数字地形模型、坡度、植被高度与植被覆盖度数据。数字地形与坡度栅格被用于绘制物理形态度量指标，包括河床、岸顶与河流中心线；而植被高度与覆盖度栅格则被用于绘制河岸植被度量指标。项目报告《用于物理河道形态与河岸植被制图的航空遥感技术》（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方法。