Land remediation planning status database integrates the 2010 change survey database information and land use overall planning database, which is used to plan the land type and space control area information and engineering information of the final round of completed acceptance projects. The following points: (1) Each layer after the spatial overlay analysis should maintain a good topological relationship. The land remediation planning status database integrates the 2010 change survey database information, the land use master plan database, used to plan the land type and spatial control area information and engineering information for the last round of completed acceptance projects, in the process of overlaying, generally should pay attention to the following points: (1) each layer after spatial overlay analysis to maintain good topology relations, the new element layer into the warehouse,