The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Dans le système d'information géographique (SIG) Web conventionnel, il existe de sérieux inconvénients en termes de temps d'attente élevé et de faible accessibilité, car la requête ultérieure doit attendre que toutes les données spatiales aient été complètement transmises. Pour résoudre ces problèmes, cet article propose une méthode de transmission progressive qui peut réduire le temps d'attente et augmenter l'accessibilité. La méthode proposée comporte les étapes suivantes. Tout d'abord, les sommets significatifs des objets géographiques sont sélectionnés sur la base d'un algorithme, Priority_Order_Estimation (POE). Deuxièmement, les sommets sélectionnés sont insérés dans la structure de données, Priority_Order_Queue (POQ). Cela permet à un client de visualiser, de demander et parfois de rejeter des données spatiales, plutôt que d'attendre que la carte entière arrive. Troisièmement, les étapes de transmission sont traitées progressivement, où les sommets significatifs de POQ sont envoyés un par un du serveur au client. Dans la dernière étape, si nécessaire, l'ensemble des données spatiales de SENDOBJSP, qui est une structure de transmission, est transmis afin que la carte originale soit affichée avec précision. Les performances du système proposé ici ont été évaluées en fonction de facteurs tels que le temps de réponse du système et l'espace de stockage client. Pour les comparaisons, la méthode de transmission totale, la méthode de transmission par couches et la méthode de transmission en quatre étapes proposée ont été utilisées. Par rapport au SIG Web classique, le temps de réponse du système est de vingt-deux pour cent plus court et l'espace de stockage client est réduit d'environ vingt et un pour cent. En conséquence, une amélioration des performances, un temps de réponse rapide et une utilisation moindre du stockage client sont obtenus. Par conséquent, la méthode proposée peut apporter une contribution significative à la prise en charge des applications SIG vectorielles basées sur le Web telles que la gestion de l'environnement, le service de carte à la demande et le système d'évaluation et de planification.
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Young-Hwan OH, Hae-Young BAE, "Minimizing Up-Front Data Transmission on Web Based Vector GIS" in IEICE TRANSACTIONS on Information,
vol. E85-D, no. 10, pp. 1628-1635, October 2002, doi: .
Abstract: In conventional Web Geographic Information System (GIS), there are serious drawbacks of high waiting time and low accessibility because the subsequent query has to wait until all the spatial data has been completely transmitted. In addressing these problems, this paper proposes a progressive transmission method which can reduce waiting time and increase accessibility. The proposed method has the following steps. First, significant vertices of geographic objects are selected into based on an algorithm, Priority_Order_Estimation (POE). Second, the selected vertices are inserted the data structure, Priority_Order_Queue (POQ). This allows a client to view, to request and occasionally to reject spatial data, rather than waiting for the whole map to arrive. Third, the transmission steps are processed progressively, where significant vertices of POQ are sent from server to client one by one. In the final step, if necessary, the entire spatial data set of SENDOBJSP, which is a transmission structure, is transmitted so that the original map is accurately displayed. The performance of the system proposed here has been evaluated according to the factors such as system response time and client storage space. For the comparisons, the total transmission method, layer transmission method and the proposed four-step transmission method were used. Compared with the conventional Web-based GIS, the system response time is twenty-two percent shorter and client storage space is reduced by about twenty-one percent. As a result, performance improvement, fast response time and less client storage usage, is achieved. Therefore, the proposed method can make a significant contribution in support of Web-based Vector GIS applications such as Environmental Management, Map On Demand Service and Assessment and Planning System.
URL: https://global.ieice.org/en_transactions/information/10.1587/e85-d_10_1628/_p
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@ARTICLE{e85-d_10_1628,
author={Young-Hwan OH, Hae-Young BAE, },
journal={IEICE TRANSACTIONS on Information},
title={Minimizing Up-Front Data Transmission on Web Based Vector GIS},
year={2002},
volume={E85-D},
number={10},
pages={1628-1635},
abstract={In conventional Web Geographic Information System (GIS), there are serious drawbacks of high waiting time and low accessibility because the subsequent query has to wait until all the spatial data has been completely transmitted. In addressing these problems, this paper proposes a progressive transmission method which can reduce waiting time and increase accessibility. The proposed method has the following steps. First, significant vertices of geographic objects are selected into based on an algorithm, Priority_Order_Estimation (POE). Second, the selected vertices are inserted the data structure, Priority_Order_Queue (POQ). This allows a client to view, to request and occasionally to reject spatial data, rather than waiting for the whole map to arrive. Third, the transmission steps are processed progressively, where significant vertices of POQ are sent from server to client one by one. In the final step, if necessary, the entire spatial data set of SENDOBJSP, which is a transmission structure, is transmitted so that the original map is accurately displayed. The performance of the system proposed here has been evaluated according to the factors such as system response time and client storage space. For the comparisons, the total transmission method, layer transmission method and the proposed four-step transmission method were used. Compared with the conventional Web-based GIS, the system response time is twenty-two percent shorter and client storage space is reduced by about twenty-one percent. As a result, performance improvement, fast response time and less client storage usage, is achieved. Therefore, the proposed method can make a significant contribution in support of Web-based Vector GIS applications such as Environmental Management, Map On Demand Service and Assessment and Planning System.},
keywords={},
doi={},
ISSN={},
month={October},}
Copier
TY - JOUR
TI - Minimizing Up-Front Data Transmission on Web Based Vector GIS
T2 - IEICE TRANSACTIONS on Information
SP - 1628
EP - 1635
AU - Young-Hwan OH
AU - Hae-Young BAE
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Information
SN -
VL - E85-D
IS - 10
JA - IEICE TRANSACTIONS on Information
Y1 - October 2002
AB - In conventional Web Geographic Information System (GIS), there are serious drawbacks of high waiting time and low accessibility because the subsequent query has to wait until all the spatial data has been completely transmitted. In addressing these problems, this paper proposes a progressive transmission method which can reduce waiting time and increase accessibility. The proposed method has the following steps. First, significant vertices of geographic objects are selected into based on an algorithm, Priority_Order_Estimation (POE). Second, the selected vertices are inserted the data structure, Priority_Order_Queue (POQ). This allows a client to view, to request and occasionally to reject spatial data, rather than waiting for the whole map to arrive. Third, the transmission steps are processed progressively, where significant vertices of POQ are sent from server to client one by one. In the final step, if necessary, the entire spatial data set of SENDOBJSP, which is a transmission structure, is transmitted so that the original map is accurately displayed. The performance of the system proposed here has been evaluated according to the factors such as system response time and client storage space. For the comparisons, the total transmission method, layer transmission method and the proposed four-step transmission method were used. Compared with the conventional Web-based GIS, the system response time is twenty-two percent shorter and client storage space is reduced by about twenty-one percent. As a result, performance improvement, fast response time and less client storage usage, is achieved. Therefore, the proposed method can make a significant contribution in support of Web-based Vector GIS applications such as Environmental Management, Map On Demand Service and Assessment and Planning System.
ER -