Application of Sub-pixel Mapping in Water Quality Mapping(WQM) for Lakes 子像元定位方法在湖泊水质制图中的应用研究
Thirdly, a new assessment model for coastal water quality was proposed through the study on the nonlinear mapping theory and DPS software. 再次,本文通过对非线性映射理论及技术进行深入学习,以DPS软件为工具,建立了近海水质综合评价的新模型。
At present, the pollution issues of lake in China are very serious, such as the pollution of water quality and sludge pollution. And the surveying and mapping data of lake are lacking for the management of lake. 目前,我国湖泊污染问题十分严重,主要是水质污染和淤泥污染,且湖泊测绘资料比较缺少。
Firstly, the high-dimension water quality data were mapped to two-dimension plane by nonlinear mapping method. Secondly, the water quality assessment model was established according to location of the mapping points. 首先,通过非线性映射理论对高维水质监测数据进行非线性变换,得到二维映射值并将其描绘在平面坐标上;然后,根据映射点之间的位置关系进行分类,从而实现对近海水质的准确评价。