The invention discloses an extensive makeup language (
XML)-based method for synchronously updating increment of spatial data, which is used for establishing a spatial data bidirectional synchronous mechanism, realizing approximate consistency maintenance of multi-copy data, and solving the problems that: according to the common
data synchronization method, offline environment is not supported, heterogeneous databases are not supported, and the synchronous object
granularity and the synchronous process cannot be freely controlled and the like. Technologies such as NET,
XML and the like are used as a basis of implementing the method for synchronously updating the spatial data. The
system comprises a changed
record collection module, a changed data organization module, a changed data conflict arbitration module and a changed
data synchronization module, wherein the four functional modules have synergistic effects of monitoring, organizing and
synchronizing the changed data to synchronously update the increment of the spatial data. According to the simple technical implementation method, the spatial data are effectively managed and automatically processed by computers, human-computer interaction is less, the time is saved, the work efficiency is improved, and the method has an extremely wide application prospect in the field of
data consistency maintenance.