With the industrial development of petroleum in our country, oil-field chemicals industry has become a newly arisen and fine chemical engineering profession quickly, it includes petroleum and chemical engineering and involves oil-field geology, fluid mechanics, gum chemistry, high mark sub-chemistry, etc.

This article introduces the application of GeoMedia Professional in oil field ground project digitization,and analyses some problems of confusion of setting Workspace,database and coordinate system of feature class,inconsistency of coordinate system between different database causing by the confusion,and incorrect coordinates system parameter of some feature class in a database.