With applying modern technologies to generating spatial data, the amount of spatial data is increasing dramatically and huge amounts of data sets are being created and stored by different agencies.
Despite the growth of spatial datasets and the expansion of their use in different applications and new emerging services, they are being acquired and maintained by different organizations under different policies and even by organizations from different political and administrative levels. In such organizational arrangement, the spatial data providers produce and manage their own datasets without considering the reuse and integration of the datasets by other users, so most of the datasets have been produced and managed for a single purpose…