The Research And Implementation Of The Full Relational Spatial Database Query Language

GSQL language which is a kind of the full relational spatial database query language ,makes use of traditional relational database mature technology and its products, expands the base spatial data types(including point,linestring , polygon and compound object) , uses spatial filter mechanism,and integrates RDBMS with the geometry model technology. Not only GSQL lanuage provides general logic operation, relational operation and arithmetic operation,but also GSQL language provides general spatial analyzing operation.The interfaces of GSQL language is identical with the interfaces of standard SQL language. Based on it,it provides graphics interfases,quadratic developing interfases and interrelated script lanuage.In addtion,it provides a full range of geodata types ,including relaiotnal ,non-relational database and file systems as well. GSQL language provides valuable use for reference.