The benchmark problem of spatial information;
Including geometric datum, physical datum and time datum, it is the basis of determining the geometric shape and spatial-temporal distribution of spatial information, and it is also the basic problem of the cross-study of spatial information technology and geodynamics.
The standard of spatial information;
It mainly includes: format standards of spatial data collection, storage and exchange, accuracy and quality standards of spatial data, classification and coding of spatial information, safety, confidentiality and technical service standards of spatial information, etc. The standard problem is the fundamental problem to promote the development of spatial information industry;
Spatial and temporal changes of spatial information;
Mainly to reveal and grasp the characteristics and laws of spatial information, and formally describe it, forming the theoretical basis of standardization; At the same time, time optimization and spatial scale are combined to solve the problems of information connection, sharing, integration and change detection under different scales;
Cognitive problems of spatial information;
Spatial information is based on the interrelated and restrictive elements in the earth's space, and has a circular structure. The spatial position, spatial form, spatial organization, spatial hierarchy, spatial arrangement, spatial pattern, spatial relations and constraints among the elements can be identified. Through static morphology analysis, cause analysis, dynamic process analysis, evolutionary mechanics analysis and time series simulation analysis, the earth's morphology is explained and deduced in order to achieve an objective understanding of the earth's space;
Spatial information uncertainty
It mainly includes: uncertainty of type, uncertainty of spatial position, uncertainty of spatial relationship, uncertainty of time domain, inconsistency of logic and incompleteness of data;
Interpretation and inversion of spatial information;
Through the qualitative interpretation and quantitative inversion of spatial information, the present situation and temporal and spatial variation law of the earth system are revealed and displayed, and many important scientific problems faced by earth science are answered from phenomenon to essence.
Expression and visualization of spatial information;
This paper mainly studies the expression and visualization technology of spatial information, involving multi-scale expression of spatial database, automatic synthesis of digital map, graphic visualization, dynamic simulation and virtual reality.