The Basic Geographic Information Management Expression And A Study Of Gravity Data Display

With the GIS thorough application, put forward the new request to the management of the basic geographic information data. Now the management function of the geographic information data strengthen, and the multisource geographic information data was managed and applied availably. The geographic information system combines with the other professional system and database more and more closely. The gravity data that one of the basic geographic information display will change the weakness of the gravity data manifestation single in the past and make the spatial distribute characteristic of the data express straightly. This paper applys the database technique and visualization technique to the study of gravity data, carries out the subject combination and opens widely the subject development. It can management the large gravity data scientifically, makes each section be able to search and use the gravity data more and efficiently and provides various gravity data results processed. This paper includes something given below:1. First introduces the basic characteristic and type of basic geographic information data. Analyzes the data model and data structure of basic geographic information data. Discusses the storage mode of basic geographic information data. Researches the technique of the basic geographic information database.2. Based on the military basic geographic information data model, according to the principle of the currency use, stability and extendibility, designs the data structure of basic geographic information. Researches and constructs the basic geographic information database. Then researches the contents of space index mechanism and current database accessing engine. We can realize the operation of basic geographic information database by current data accessing engine, including the connect and disconnect the database, read and write data or big data document, supporting the multiuser access at one time.3. Studies the contents and basic methods of the basic geographic information visualization expression. Analyzes the establishment possibility and the characteristics of the map symbolic database. Designs the structure of the map symbolic database. Introduces the symbolization control technique. Considering the characteristics of the point, line and area, we study the symbolization control and symbolization realization of the basic geographic information.4. Discusses the concept of the gravity data such as the gravity anomaly, height anomaly and the deflection of the vertical. Studies the format and the processing methods of the gravity data. Realizes the gravity data marriage and the draw of the gravity data isoline and the area. Increases the encode of the gravity anomaly, height anomaly and the deflection of the vertical. Together with the basic geographic information management system and the gravity data, realizes the gravity data visualization and simple application.