摘要
以Visual C++为平台开发了等值线ActiveX控件。针对渔业环境要素数据的数据量大、分布范围广、空间分布形式不同等特点,对于数据规模较大的近似规则分布的数据点,采用了先对缺失值的补插,再搜索生成原始等值线,然后进行磨光的方法;而对于散乱原始数据点的数据,则分别采用了反距离插值、普通克里金法以及多面函数法三种不同的方式分别进行数据加密处理,再生成等值线的方法。最后将此控件用于渔场环境制图的开发,并对其实现效果进行了比较。
A contour control ActiveX was developed under the Visual C＋ ＋ 6.0 platform. In consideration of the large volume, vast extent and various distribution styles of sample points of fishery environment in the ocean, different measures were taken to generate contours. In the case of huge data points distributed more or less uniformly, then firstly interpolate the not existed data, via which to generate original contour lines and smooth them to improve their appearance. For the scattered data points, three interpolation methods were applied to densify them and afterwards convert them to regular data grid in order to produce contour lines. The control ActiveX was applied to the fishery environmental cartography and a comparison of contour maps created by different algorithms was also made at the end.
出处
《遥感信息》
CSCD
2008年第2期76-79,共4页
Remote Sensing Information
基金
国家高技术863计划(2003AA637030)
国家科技支撑计划(2006BAD09A05)项目
