A systematic approach to reduction of user-perceived response time for GIS web services

  • Authors:

  • Shengru Tu;Xiangfeng He;Xuefeng Li;Jay J. Ratcliff

  • Affiliations:

  • University of New Orleans, New Orleans, LA;University of New Orleans, New Orleans, LA;Loyola University, New Orleans, LA;US Army Corps of Engineers, New Orleans, LA

  • Venue:
  • Proceedings of the 9th ACM international symposium on Advances in geographic information systems
  • Year:
  • 2001

Quantified Score

Hi-index 0.00

Visualization

Abstract

The research of Internet distribution of GIS contents is still in its infancy. This paper reports an implementation of a systematic approach to optimize Internet distribution of GIS datasets. The goal is to reduce user-perceived response time and improve users' navigation efficiency.On the server side, a large GIS dataset associated with a map is decomposed into small blocks and organized into an overview guiding hierarchy. On the client side, locality-based caching and pre-fetching techniques are devised at the application level. To prevent the GIS application server from being overwhelmed by the excessive pre-fetching requests, it is necessary to enforce a priority queue for the web server: user requests always have high priority than pre-fetching requests. Experiments have shown significant improvement on user-perceived response time.