Research on embedded WebGIS based on progressive transmission;

Vector Map Data s Progressive Transmission Based on Strip-Tree;

For transfer order analysis,a mat of semantic and scale is built to describe the map data set and two kinds of transmission order is offered to apply in different progressive transfer processes,namely the semantic priority order and the scale priority order.

This paper presents a multi-way tree based multi-scale line structure for progressive transmission of vector data.

The characteristics of the mobile computing terminal are the following: the display is small and it need not much information in detail,the performance is low and it is difficult to process the models with high details,the bandwidth of wireless network is narrow and it needs a progressive transmission.

ROI progressive image transmission algorithm based on human visual specialties;

In this paper,a wavelet based Region of Interest(ROI) progressive image transmission algorithm is proposed.

Based on the consideration of the characteristic of human sight,a new progressive image transmission approach based on ROI coding method has been proposed in this paper to improve the subjective quality of .