Geographic information system and method for land planning

The invention relates to the technical field of geographic information, in particular to a geographic information system and method for land planning. The method comprises the following steps: preprocessing geographic information data from different sources, integrating the geographic information data into a uniform data format, performing consistency check and correction, and storing corrected consistency data and a list of identified inconsistent data points; the method comprises the following steps: optimizing processing flows of data integration, data inspection and data storage and data, ensuring seamless collaboration among modules based on output of all modules, and processing contradictions in each processing process; and performing spatial analysis based on the corrected consistent geographic information data, and performing land classification and evaluation, land utilization change simulation and land utilization planning based on spatial analysis result data to obtain an optimized land utilization