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

Content Provider	ACM Digital Library
Author	Tu, Shengru Ratcliff, Jay J. Li, Xuefeng He, Xiangfeng
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.
Starting Page	47
Ending Page	52
Page Count	6
File Format	PDF
ISBN	1581134436
DOI	10.1145/512161.512172
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2001-11-09
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Gis Java Applet Caching Response time Web Hierarchical model Pre-fetching
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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