The analysis of allowable error implies that the allowable error of relational data of database is non-uniform.
数据误差分析显示：关系数据的允许误差是不均匀的。
For the macroscopic reservoir parameters, the permeability was enhanced, and the porosity variation was within the range of allowable error.
在宏观参数上则表现为渗透率的增加，储层渗透性变好，而孔隙度变化值在误差允许的范围基本不变。
Then a feature based polyhedral model is reconstructed adaptively, so a large scale precise data reduction, under allowable error, is also realized at the same time.
在此基础上，完成了基于特征的曲面网格自适应构造，实现了大规模点云的精确数据压缩。
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