Canals

This feature class was developed to represent canals and their associated attributes for the purpose of mapping, analysis, and planning. The accuracy of this data varies and should not be used for precise measurements or calculations. Created in the Early 90's By MIS from the inverse of parcels polygons. Originally converted off of the Wang Main Frame.本要素类（feature class）专为表征运河及其关联属性而开发，以满足制图、分析与规划的需求。本数据的精度存在差异，不得用于精准测量或计算工作。该数据集于20世纪90年代初期由MIS基于宗地多边形的逆向数据构建。最初由王安大型主机（Wang Main Frame）转换得到。