基于ArcGIS API for JavaScript的森林抚育成效监测专题图研究

为了及时掌握森林抚育的实施情况,科学评价政策实施绩效,准确反映森林抚育对森林生长和效益等各方面的影响,建立森林抚育成效监测体系。本文首先对森林抚育成效监测的相关业务调查分析,总结了现阶段森林抚育成效监测的主要内容,分析适用于森林抚育成效监测专题地图的可视化表达机制,设计并实现了森林抚育成效监测专题图表达框架。并针对ArcGIS API for JavaScript没有提供图表专题类的问题,提出了一种与ECharts图表库相结合制作专题图的方法。此方法通过Canvas方式在客户端生成统计图表,具有丰富的图表类型和强大的交互功能,能够满足不同数据的处理需求,丰富了统计图表专题图表达形式,让数据呈现更加完美,能满足各种用户的制图需求。

Research on Thematic Map of Forest Tending Monitoring Based on ArcGIS API for JavaScript

In order to timely grasp the implementation of forest tending,, and scientifically evaluate the performance of policy imple-mentation, accurately reflect the impact of forest tending on forest growth ,benefits and other aspects, establish a forest tending effec-tiveness monitoring system. In this paper, the main contents of forest tending effectiveness monitoring are summarized, and the visual expression mechanism of thematic map for monitoring the forest tending effectiveness is analyzed. The expression monitoring framework of forest tending effectiveness monitoring is designed and realized. The ArcGIS API for JavaScript does not provide a class to imple-ment the thematic maps, and proposes a method for making thematic maps with the ECharts chart library. This method can generate statistical charts on the client side through Canvas, has rich chart types, can meet the processing requirements of different data, enrich expression in the form of thematic maps charts, make the data show more perfect, and can meet the drawing needs of various users.