Wang Mi

On three-dimensional visualization of geospatial information: graphics based or imagery based?

The three-dimensional (3D) visualization of geospatial information constitutes a fundamental property of the geo-information services nowadays, along with the requirements of popularity, openness and capabilities of target measuring and knowledge mining. Accordingly, in this article, the two major technical routines now applied to 3D visualization of geospatial information, that is the graphics-based approaches and the imagery-based approaches, are both described and discussed. After a comparative analysis of both advantages and disadvantages of the two manifestation modes, an optimized integrative strategy for 3D visualization of geospatial information is proposed finally.

Speech recognition technology applied to intelligent mobile navigation system

The capability of human-computer interaction reflects the intelligent degree of mobile navigation system. The navigation data and functions of mobile navigation system are divided into system commands and non-system commands in this paper. And then a group of speech commands are abstracted. This paper applies speech recognition technology to intelligent mobile navigation system to process speech commands and does some deep research on the integration of speech recognition technology with mobile navigation system. The navigation operation can be performed by speech commands, which makes human-computer interaction easy during navigation. Speech command interface of navigation system is implemented by Dutty ++ Software, which is based on speech recognition system-Via Voice of IBM. Through navigation experiments, navigation can be done almost without keyboard, which proved that human-computer interaction is very convenient by speech commands and the reliability is also higher.

Distribution of large volume image data using the mixed mode of Java Servlet and COM on Web

This paper reports some researches on distribution of large volume image data using techniques of the Mixed Mode of Java Servlet and COM on Web. The architecture and key technologies are discussed in detail. The web distribution system of image is implemented and the system is tested by the application instances. At last, the advantages and disadvantages for this web image distribution mode are analyzed.

Multi-resolution seamless image database

This paper presents the basic concepts and principles, data structure and high efficient spatial index for multi-resolution image database. The database is characterized by arrangement of multi-resource image data and seamless mosaic, distribution-based storage and management, integration with other spatial database software such as GeoStar and GeoGrid developed by Wuhan Technical University of Surveying and Mapping.

DEVELOPMENT OF ITS AND APPLICATION OF 3S IN ITS

This article introduces the background and development of ITS and the emphasis on developing ITS in China in the forthcoming years. Furthermore, it describes the application of the 3S (GIS, GPS, RS) technology in developing ITS.