基于IDL语言的太湖蓝藻水华遥感监测信息系统设计

以MODIS L1B数据为数据源,采用IDL语言,运用系统配置与插件技术实现系统架构,设计中间件解决系统框架和IDLDrawWidget控件通信接口的衔接问题,设计模型对象管理器组织模型对象,设计IDL数据显示的组织结构实现图像显示及其与矢量数据的叠加显示,使用相对图像坐标系显示叠加的矢量数据,并运用影像匹配技术和仿射变换技术分别实现了MODIS L1B影像"双眼皮"消除及其几何校正,在此基础上运用蓝藻水华遥感监测模型,实现蓝藻水华空间分布信息自动化提取。

Design of Remote Sensing Information System for Monitoring Cyanobacteria Bloom in Taihu Lake Based on Interactive Data Language

The quickly monitoring of cyanobacteria bloom in Taihu Lake is significant to emergency response plan and the building remote sensing monitoring system can provide effective support.The system data are derived from MODIS Level 1B,and the system is designed based on interactive data language.The System configuration and plug-in techniques are used to implement system architecture,the middleware is designed to solve problem of communication between system architecture and IDL Draw Widget control,the model manager is designed to organize all model objects,the IDL display data structure is arranged to view and overlay vector data on image based on relative image coordinate system.Image matching and affine transform methods are adopted to remove MODIS bowtie and perform the geometric correction.Based on these techniques,cyanobacteria bloom spatial distribution information is automatically extracted from pretreated image data using the remote sensing inversion model,eventually achieving remarkable results in monitoring cyanobacteria bloom in Lake Taihu when running the information system.