Method and system for updating drainage pipe network data

The invention relates to the technical field of pipe network data processing, and provides a drainage pipe network data updating method and system, and the method comprises the steps: obtaining the field data of a measurement region, and generating new library pipe network data; searching a main pipeline and a main pipeline point from the new library pipe network data; screening out edge connecting points from the main pipe points; pipeline types and Y-axis coordinate values of all edge connecting points are extracted; for each pipeline type, the edge connecting point with the maximum Y-axis coordinate value is taken as an edge connecting path starting point pipe point, and the other edge connecting points are taken as edge connecting path end point pipe points; creating a road network table; obtaining a space vector of the shortest path of the road network table according to the edge matching path starting point pipe point and the edge matching path end point pipe point; obtaining intersecting main pipelines