基于WebGIS构建区域农业资源信息发布系统

农业资源信息具有明显的空间信息特征，主要表现为空间性、时序性和分布性，上述特点决定了农业资源信息的发布需要由网络化空间信息系统——WebGIS支持。基于WebGIS建立的区域农业资源信息发布系统使用ArcSDE建立空间数据库，基于ArcIMS实现农业资源信息的发布，其体系结构由WEB展示层、逻辑事务层、数据存储层和数据管理层等4层组成。系统建成后，可以实现对大量的农业资源信息数据进行有效管理，并能及时、准确地发布多元的农业资源数据，让这些数据为分布在各地的农业相关部门以及农民所知。

DEVELOPMENT OF AN INFORMATION PUBLISHING SYSTEM FOR REGIONAL AGRICULTURAL RESOURCES BASED ON WebGIS

As agricultural resources information is characterized by its spatiality, sequentiality and distribution, its publishing resorts increasingly to the supportance from WebGIS. This paper proposes a solution to WebGIS development for a regional resources information publishing system. The overall system infrastructure is composed of web application tier, web service tier, data service tier and data management tier. A detailed presentation is given of several key development technologies, including the operation of ArcSDE to access spatial data and the introduction of ArcIMS to employ information publishing. After its development, this system will be able to publish spatial agricultural resources data to farmers and related agricultural agencies via web nationwide and provide them with more accurate and timely information.