基于IconMap的可视化技术及其在土壤肥力分析中的应用

IconMap Visualization Technique and Its Application to the Analysis of Soil Nutrients

基于IconMap可视化技术,将传统以像元为架构的栅格数据结构扩展为icon图形设计,使得简单的栅格数据层能够在每个位置表达多个地理空间变量,从而揭示彼此协同作用产生的空间模式,达到挖掘地理空间信息的目的。在IconMapper原型系统软件支持下,进行了成都双流县土壤有机质及养分的可视化研究实验,结果表明,静态IconMap能够较好地显示土壤有机质及各养分高值分布趋势,而动态IconMap既能反映有机质及养分之间的协同关系,又能综合表达土壤肥力的质量水平。

The IconMap visualization technique is an icon-based approach for multivariate geospatial data sets by extending the pixels of traditional images to icon images. The extension from pixels to icons in the IconMap technique enables raster GIS to represent multiple variables at a single location in the simple＇ raster data model. A very large number of adjacent icons in an icon map form geographic patterns that are based on interrelations between the individual variables. To demonstrate the usefulness of the technique, the IconMap approach was used to visualize the soil organic matter and nutrient contents in the Shuangliu County, Sichuan province under IconMapper system. The result indicates that the static icon map can well identify the distribution trend of the soil nutrient variables while the dynamic icon map can reflect the co-occurence relationships between them and the fertility quality of the soil synthetically.