Research on Spatial Data Sharing Based on GML3.1

The open and standardized operational interface is important for the systematic and integrated development of geographical information system which enables different systems to interoperate in a standard way and ensure validity and efficiency of operations. This paper discusses the geo-spatial data encoding implementation specification--GML3.1,which is constituted of OGC and is based on XML, elaborates the method and process of establishing the GML3.1 application schema and introduces respectively the spatial data sharing modes including spatial data exchange, unification of spatial data formats, metadata sharing and WebGIS construction based on GML3.1.