基于WebGIS 中国农田养分平衡与环境风险评价系统的构建

在分析了ArcIMS的体系结构及其运行机制的基础上,基于ArcIMS9.0平台,采用空间数据引擎技术、数据库技术及ASP.NET编程技术,结合农田养分平衡模型和环境风险评价模型,设计开发基于WebGIS中国农田养分平衡与环境风险评价系统。系统主要包括远程基础数据库管理、基本数据查询分析、养分专题制图、在线养分平衡分析、环境风险评价分析及施肥策略咨询等6大功能,将农业基础数据通过模型运算的结果与地图数据相结合,实现了全国范围内基本农业数据、农田养分平衡与环境风险等信息的在线共享、评价与施肥咨询服务。

WebGIS-based information system for nutrient balances and environmental risk evaluation in Chinese agroecosystem

The system frame work and operation mechanism for ArcIMS were analyzed. Based on the platform of ArcIMS 9.0, a scheme with multi architecture for WebGIS was put forward with the help of ASP.NET technology. Combined with the knowledge models of farmland nutrient balance and environmental risk assessment, the WebGIS-based information system for the nutrient balances and environmental risk evaluation in Chinese agroecosystem has been developed. The system included six function modules named as basic database management module, data query and analysis module, the nutrient thematic mapping module, on-line nutrient analysis module, environmental risk assessment module, and fertilizer consultancy service module. Combining map data with the result of the modules which deal with agricultural basic data, the system could provide the services of on-line share, evaluation and consultation of the national farmland nutrient balance and environmental risk assessment.