基于开源WebGIS的土壤环境质量信息系统的设计与开发

Design and development of soil environment quality information system based on open source WebGIS

以开源WebGIS技术为基础,将WebGIS和评价模型有效结合,设计并建立了土壤监测评价系统并成功应用。该系统具备GIS常用的图形操作功能,还能进行数据管理、综合查询、统计分析评价及可视化结果发布。不仅能对各点位各监测指标进行单项查询和评价,还可以结合时间尺度、监测范围和土地利用类型等信息进行统计分析和综合评价。通过对数据进行对标分级的质量状况评价、变量序列的统计分析和时空变化上的对比分析,实现了单点单指标监测点基本信息及监测数据检索、单点多指标的监测数据检索及对比分析、多点单指标的监测数据检索与对比分析、多点区域平均对比及统计分析、单因子污染评价和内梅罗指数综合评价以及等值面统计等具体功能,并利用WebGIS技术的优势,将各种数据信息及综合分析结果可视化,便于土壤环境的信息化管理及决策支持。

Based on open-source WebGIS technology, and through effective combination of WebGIS and evaluation models, a soil monitoring and evaluation system was designed and successfully applied. This system has not only the general functions of GIS graphic operation, but also the functions of data management, comprehensive query, statistical analysis and evaluation results visualization. It can not only query and evaluate each monitoring index, but also combine the time scale, monitoring range, land use type and other information to carry out statistical analysis and evaluation. By implementing three kinds of statistics processing of the huge data, including quality status evaluation, variable sequence statistics analysis and spatiotemporal change contrast analysis,the following functions are realized: single-point single-index basic information and monitoring data retrieval;single-point multiindex monitoring data retrieval and comparative analysis;multi-point single-index monitoring data retrieval and comparative analysis;multi-point regional average comparison and statistical analysis;single-factor pollution evaluation;Nemerow index comprehensive evaluation and ISOSURFACE statistics. Taking advantage of the convenience of WebGIS technology, visualization is achieved of all the data information and comprehensive analysis results to facilitate information management and decision-making for soil environment.