A DISCUSSION ON SOME TRENDS OF GEOGRAPHIC INFORMATION SYSTEMS
地理信息系统发展趋势

: Based on the progress of geographic information systems (GIS) in different countries, the definition and basic components of a GIS were involved, and five trends relating to the deve- lopment of GIS were discussed. These trends are as follows: 1. The GIS has become an important component of a being perfected technical system applied to geography; 2. To perform various types of spatial analysis represents a major aim in applications and research of GIS; 3. The most important technical topic within the field of GIS concerns the spatial data structures; 4. The integration of approaches and procedures within a single system is becoming in- creasingly evident; 5. A great attention has been paid to the research on the standardization and artificiai in- telligence techniques.