银川平原湿地时空变化信息的可视化分析

针对在湿地动态变化监测中,经典的土地利用转移矩阵无法实现湿地类型变化信息的定位可视化表达的问题,提出了一种新的时空变化信息的可视化分析方法。利用由空间单元和时序单元集成的时空复合单元建立转移图谱单元分类体系,较好地记录每一个图谱单元湿地类型的起始和终止状态,实现了湿地时空变化信息的定位表达;基于遥感制图和地学图谱的湿地空间演变规律特征图谱,采用图表和图谱的形式展示湿地类型变化的数量及空间位置变化信息,实现了湿地时空变化的可视化表达。基于银川平原湿地的实验结果表明:该方法能够清晰、直观地显示1999—2013年期间银川平原湿地的时空变化,能够为该地区合理利用湿地资源提供科学的理论依据。

Visual analysis of wetland spatio-temporal variation in Yinchuan plain

According to the issue that the classical land use transfer matrix cannot achieve visualization of wetlands dynamic change information in dynamic monitoring of the wetlands,this paper presented a new method to achieve visual analysis of wetland spatio-temporal variation.By using the space-time composite element which is integrated by the space unit and timing unit,we can establish the transfer pattern classification system.It can be used to record the wetlands' starting and ending state of each map unit,realizing location expression of wetland spatio-temporal variation.Characteristic Tupu of spatial evolution of wetland,which is based on remote sensing mapping and Geo-information TuPu,can display the quantity and spatial position change information of wetland types in a more intuitive form of graphs and maps.It can realize visual expression of wetland spatio-temporal variation.The results of experiment in Yinchuan Plain indicate that the method can realize wetland spatio-temporal variation in Yinchuan plain during 1999 to 2013 in a more clear and intuitive way,and provides scientific theoretical basis for rational use of wetland resources.