...约束数据域，两步法 [gap=957]eywords: Delaunay triangulation, Doubly-Connected Edge List, Divide and conquer, Constrained data set, Two-step system.
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顾及地形特征线的散点域(约束数据域)三角剖分是建立高精度数字地面模型的基础，在GIS、地学分析、计算几何、多分辨率DTM等领域中有着广泛的应用。
The triangulation of constrained data set is widely used in Geographic Information System (GIS), geo-science, computational geometry, multi-resolution and high precision DTM, et al.
由于项目受到资源和时间的约束，该分析常常集中于主要的数据元素和域。
Project constraints in resources and time invariably force a focus down to primary data elements and domains.
设计域完整性属性。考虑CHECK约束，数据类型和是否非空。
Design attribute domain integrity. Considerations include CHECK constraints, data types, and nullability.
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