A Web-based two-dimensional/three dimensional geospatial image visualization system.

摘要

Intemet-based Geospatial information services (GIServices) are emerging as an important technological trend, driven by the innovations of geospatial information and communication technology. Towards this end, one of the main challenges is related to the capacity to effectively handle large-volume spatial data sets across a limited network bandwidth. The main purpose of GeoServNet (GSN), developed by the GeoICT (Geospatial Information and Communication Technology) Lab at York University, is to address this challenge. GSN is an advanced Intemet-based geospatial information system (GIS) that has the capacity to perform both 2D and 3D geospatial processing. The system is also capable of handling all major spatial data types, namely: vectors, images and DEMs. The present thesis focuses on applying image streaming technology, as well as several advanced data management techniques, to improve visualization, transmission and access of large image data sets. The thesis also addresses several issues related to the integration of a new GSN Globe viewer, a technology for dealing with high resolution images (using Canada as a showcase) over the internet.