摘要
针对现有数字水深模型(DDM)多尺度表达过程中由于单一固守"安全性"准则所导致的DDM表达精度不高和DDM产品形式单一及使用范围受限的问题,该文在简要介绍二维滚动圆变换及其在等深线化简中的应用的基础上,通过对二维滚动圆变换的维数扩展,提出了滚动球变换的概念。经过大量的计算推导,得到了正(负)向滚动球变换的不同组合方式,实现了既可以顾及"安全性"准则,又能够满足"保真性"需求的DDM多尺度表达方法。该方法可以提高测深数据的利用率和数据表达精度,适应多领域不同层次的DDM应用需求。
The problems that the DDM expressed with low accuracy,shortcomings of single form and limitation of scope were showed up,for complying with the safety standards.Based on the brief introduction of 2Drolling circle transform and its application in contour reduction,the concept of rolling ball transform by Dimension extension of 2Drolling circle transform was put forward in the paper.By a lot of calculation and formulas derivation,the different combination of positive（negative）direction rolling ball transform was obtained and the automated generalization considering both safety and reality principle were realized.This method can improve the utilization rate of the sounding data and the data precision,it can meet the needs of DDM application of various fields and different levels.
出处
《测绘科学》
CSCD
北大核心
2016年第12期19-21,38,共4页
Science of Surveying and Mapping
基金
国家自然科学基金项目(41571441)
