Method and system for selecting source land parcels needing rectification in pipe network reconstruction project

The invention relates to the technical field of municipal engineering, in particular to a method and system for selecting a source plot needing rectification in a pipe network transformation project. Tap water meter data of each source land parcel are sorted and summarized; obtaining the coordinates and the area si of each source plot; calculating sewage quantity qi of each source plot; calculating the transformation cost wi of each source plot; calculating the total cost of transformation of all source land parcels, and comparing the total cost with the investment limit; if the investment limit is not greater than the investment limit, transforming all source land parcels; if the investment limit is greater than the investment limit, analyzing a scheme that the sewage quantity of the rectified source land parcels is maximum under the limited investment, and generating a source land parcel list A needing to be transformed; re-checking and adjusting the source land parcels needing to be transformed in the sour