基于IDL的二维海洋遥感数据地图化的实现方法

Visualization programming of mapping 2D oecan data using IDL

二维海洋信息对应着物理要素的地理空间分布,通常须叠绘在真实感地图背景上,通过提高图像的可视化显示效果帮助人们理解和分析数据,而如何选择地图图像并使其与待绘制海洋数据有机叠加是海洋信息可视化实现的关键。基于GEBCO数字地图集(GDA)和IDL的对象图形系统,利用累积的阿尔法混合技术,详细阐述了二维海洋数据显示模型的构建与可视化实现途径。目前,该方法已成功用于海洋要素及海洋现象的二维显示。应用事例说明,该方法可有效改善二维海洋信息可视化效果。

2D ocean information, corresponding to the＇geographically spacial distribution of physical data, usually should be overplotted with needed realisticmap, which would improve image visual eltect and help to understand and analyze the data. llae key to achieving ocean imtormation visualization is to choose map data available and fuse it with objective data. Based on GEBCO digital atlas data set and IDL object graphics system, by means of cumulative alpha blending technology, the construction of 2D ocean remoting sensing data display model and its visualization method is detailedly demonstrated. The proposed method has been successfully applied to the visualization of 2D ocean element and ocean phenomenon structure, q＇he application results show that it can improve the 2D ocean data visualization effectively.