Constraints of progressive transmission of spatial data on the web |
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Authors: | Tinghua Ai |
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Institution: | AI Tinghua School of Resource and Environment Sciences,Wuhan University,129 Luoyu Road,Wuhan 430079,China |
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Abstract: | The progressive transmission of map data on the World Wide Web provides the user with a self-adaptive strategy to access remote
data. It not only speeds up the web transfer but also offers an efficient navigation guide for information acquisition. The
key technology in this transmission is the efficient multiple representation of spatial data and pre-organization on the server
site. This paper aims at progressive transmission investigating some constraints from three aspects: data organization on
server site, data control in the transmission process and data restore after reaching the client. Two strategies, namely on-line
map generalization and off-line map generalization, are examined respectively for this kind of progressive transmission. |
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Keywords: | progressive transmission map generalization spatial resolution |
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