com豆丁网 ）、环境 数据编码标准（EDCS，Environment Data Coding Standard）和空间参考模型（SRM，Spatial Reference Model）实现了对自然环境进行完整的准确的表示，通过应用程序接口（API， ApplicationProgra..
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The ellipsoid model is the first part of a spatial reference system definition.
椭圆体模型是空间引用系统定义的第一部分。
Conclusion: The spatial reference memory and spatial working memory are reliable methods to examine AD model.
结论：空间参考记忆和空间工作记忆是检测ad模型的可靠方法。
For fast calculating the signed distance from spatial point to STL model, a reference ball method was put foward based on linear octree.
针对如何快速求取空间点到STL模型表面有符号距离这一问题，提出一种基于线性八叉树的参考球方法。
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