滚动球变换的高保真TIN_DDM构建及多尺度表达

针对当前不规则三角网数字水深模型（TIN_DDM）水深选取对真实海底地形表达的考虑不足，本项目将构建基于滚动球变换的高保真TIN_DDM建模及地形结构化框架精确提取技术，建立面向地形匹配的水深选取评价指标与模型，提出以地形结构化框架信息为核心支撑的层次递进式水深选取评价指标定量调控与严密转换理论及方法，设计海底地形复杂度与采样密度快速自适应匹配的高保真TIN_DDM多尺度表达方案。本项目的成功实施有望提出以“点—线—框架—面”为主线的精细化海底地形特征调控新模式，创新骨架地形定量调控、嵌套地形联合约束、细节地形辅助协调的层次递进式水深选取技术方法，使所构TIN_DDM能够满足非航海领域对于地形特征准确性、地形形态嵌套性及水深序列表达严密有序性的应用需求。

Currently, sounding selection of Triangulation Irregular Network Digital Depth Model (TIN_DDM) fails to take a full consideration about the real submarine terrain. To overcome this limitation, the project constructs a high fidelity TIN_DDM modeling technique and a precise terrain structural framework extraction method based on rolling ball transform, and builds assess indexes and models to evaluate the sounding selection for terrain matching. Taking terrain structural framework information as the core support, the project also proposes hierarchical progressive theories and methods which can be applied to quantitative regulation and rigorous conversion of sounding selection assess indexes. Meanwhile, high fidelity TIN_DDM multi-scale representation scheme is designed, under which the submarine terrain complexity can rapidly and self-adaptively match the sampling density. Achievements of this project are expected to put forward a new refined regulation model of submarine terrain features, which is set on the principle of “point-line-framework-surface”, and to innovate a new hierarchical progressive sounding selection method which is quantitatively controlled by skeleton terrain, jointly constrained by nested terrain and supported and coordinated by detail terrain. Finally, the constructed TIN_DDM is capable of satisfying the application requirements in non-navigation field for high accuracy of terrain feature, nesting of terrain morphology and rigorous and ordered expression of water depth sequence.