顾及水深复杂度的自适应网格DDM构建方法  

A Method for Constructing Adaptive Grid Digital Depth Model Considering Depth Complexity

作　　者：贾帅东[1] 张立华[1] 曹鸿博[1] 朱穆华[1] 

机构地区：[1]海军大连舰艇学院海洋测绘科学与工程系,辽宁大连116018

出　　处：《海洋测绘》2011年第2期4-7,共4页Hydrographic Surveying and Charting

基　　金：国家863计划项目(2009AA12Z202);国家自然科学基金(4081189)

摘　　要：针对传统网格数字水深模型(DDM)存在不能根据海区水深变化情况自动调节内插水深间隔的不足,提出顾及水深复杂度的自适应网格DDM构建方法。建立了水深复杂度评估指标,挖掘了水深复杂度、网格间距与网格DDM精度的内在关联规律,构建了顾及水深复杂度的自适应网格DDM。实验证明,与传统的网格DDM构建方法相比,所提方法可根据DDM的精度需求自动调节网格剖分层次,并能明显改善DDM精度。Aiming at the drawbacks of not being able to automatically adjust depth space according to depth variance in different sea areas in traditional methods for constructing digital depth model（DDM）,a method for constructing adaptive grid DDM considering depth complexity is proposed.A standard for evaluating depth complexity is founded;the internal relationship is mined among depth complexity,grid resolution and accuracy of grid DDM,and adaptive grid DDM considering depth complexity is constructed.Experimental results demonstrate that the proposed method can automatically adjust grid generation level according to the requirement of DDM accuracy,and improve the accuracy of grid DDM.

关 键 词：水深复杂度 自适应 数字水深模型 网格剖分 

分 类 号：P229.1[天文地球—大地测量学与测量工程]