Rapids

A linear feature class representing rapids digitized across the width of the water feature within the municipal boundaries of the City of London as identified through aerial imagery.本数据集为线性要素类（linear feature class），其所表征的急流要素是通过航空影像识别，并在伦敦市（City of London）行政边界范围内沿水体景观宽度数字化获取的。