Model-driven Space-based Vector Data Conversion Method

It is in urgent request to sharing space information for people of 21 centuries in the space information application. For carrying space information of space data, sharing space data is vital approach of sharing space information. People now come to realize that it's important to study the technique of sharing space information, but with some restrictions, it's still difficult for us to realize the large-scale space data sharing. In the production of the digital military map, the exploitation of multi-source data is also very important for producing digital map now.As one kind of theories in sharing space data, data fusion has been introduced for a long time, according to which many method of sharing data are coming forth continuously now. But, because of the operation difficulties, these methods usually can't be properly meet demand.In order to investigating a new the path of fusion, this article put forward a new method for data conversion that based model driven, with learning the conception of semanteme and theory of model driven, by which we can solve the problems of data structure expansion and losing information during transacting.It's a new trial to introducing model driven style in data fusion. Through the research on model driven technical, analysis and conclusion on the data fusion method, this article divides it into three technical modules for designing and studying: 1.Set up a suitable management of data structure; 2.Set up a suitable management of conversion method; 3.Set up a suitable management of "operation process".It's the classification on the whole constitution of model driven. These parts together realize data fusion methods according to the model driven theory. Also, they are the keystones of this article.At the same time, we analyze the requirements which we mention above, and give the proper measures:1. Managing data structures according to the conception at "sect replaces entireness", by which we can not only avoid the crisis of data structure expanding, but also manage the structures in the particular model driven way.2. Managing the operations of data fusion in an abstract style, and make them don't rely on the given structure any longer.3. Adopting the style of model driven, we can process the data fusion without some manymanual works, and the problem of a batch processing seems to be easy.4. The visible environment meets the requirement of convenience and celerity, by which themodels can be more clearer.These sects constitute the whole architecture of realization of data fusion sustained by model driven technique. Based on these, we develop a test system:"CPM", which is used to verify the feasibility of model driven technique, has been applied in map production.