WebGIS中三层结构技术的应用

钟涛

WebGIS中三层结构技术的应用

钟涛

南京航空航天大学民航学院江苏南京 210016

详细信息

作者简介:
钟涛(1977-), 男, 江苏省宜兴人, 南京航空航天大学硕士生, 从事交通信息管理及通信研究

中图分类号: TP393
计量
- 文章访问数: 268
- HTML全文浏览量: 80
- PDF下载量: 593
- 被引次数: 0
出版历程
- 收稿日期: 2002-06-10
- 刊出日期: 2002-12-25

Application of three-tired structure technology in WebGIS

ZHONG Tao

School of Givil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

More Information

Author Bio:
ZHONG Tao (1977-), male, a graduate student of Nanjing University of Aeronautics and Astronautics, engaged in research of transportation information management and communication

摘要

摘要: 为了寻找一种适合民航运输行业特点的GIS建设方案, 在比较了几种GIS设计方案, 分析了Web GIS的特点, 对目前三种主要的Web GIS实现方法进行了研究, 最终选择了三层结构的客户机/服务器模型作为实现民航运输地理信息系统的基本框架; 从逻辑结构和功能结构两方面, 对三层结构模型进行了详细介绍, 并简要介绍了三层结构模型在民航运输地理信息系统中的具体实现。通过实践, 尽管还存在一些缺点有待克服, 但三层结构客户机/服务器模式的Web GIS所具有的维护少, 操作简便, 客户端要求低, 可以较好平衡负载等特点, 使它成为一种理想的、适合民航运输业用户分散、数量众多、数据量大等特点的地理信息系统建设方案。
- 民航运输 /
- WebGIS /
- 三层结构 /
- 地理信息系统
Abstract: In order to find a plan to build the GIS that is suitable for civil aviation transportation, several current building plans for GIS and the characteristics of WebGIS were introduced and compared with each other. Three main methods for WebGIS building were analyzed. It is decided to take the three tired structure client/server model as the fundamental frame of the civil aviation transportation geographic information system (CATGIS). The three tired structure model was described. This model is realized in CATGIS. Through the practice, though the system has some disadvantages, but its advantages, such as less maintenance, simpler operation, lower requirement for users and easier allocation of loads, make it be an ideal scheme for building CATGIS, which meets the needs of civil aviation transportation.
- civil aviation /
- WebGIS /
- three tired structure /
- GIS

HTML全文

图 1 三层结构模型逻辑划分

Figure 1. Logic structure of the three-tired model

下载: 全尺寸图片幻灯片

图 2 系统框架

Figure 2. System Frame

下载: 全尺寸图片幻灯片

图 3 数据访问响应时间与进程数的关系

Figure 3. Relationship between the data access time and the number of processes

下载: 全尺寸图片幻灯片

参考文献(5)

[1]	LIN Lian-sheng. Development and forward problems of geographic information system[J]. Jiangxi Hydraulic Science and Technology, 2000, 26(3): 137-143.
[2]	ZHUO Yong. Analysis of WebGIS technology[J]. PC World China, 1998, 49(1): 54-55.
[3]	XUE Xiao-feng, WANG Xiao-cheng. The research on the processing models of WebGIS[J]. Microcomputer Applications, 2000, 16(1): 26-27.
[4]	PENG Ming-jun. The research on the implementation and development of WebGIS[J]. Wtusm Bullerin of Science and Technology, 2000, 25(1): 41-44.
[5]	CHENG Chang-xiu, YAO Yan-min. The research of WebGIS based on the N-layer model[J]. Remote Sensing Information, 2000, 15(3): 5-8.