...词：空间数据模型；栅格数据模型；集成化数据模型；欧氏距离变换 [gap=1150]Key words】S patial data model ; Grid data model; Integrated data model; Euclidean distance transformation ..
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3D grid data model 三维栅格数据
We could make them different by adding another column for values in the grid model data.
我们应该让这二者不同，于是我们在此网格模型数据内添加了另外一个值列。
If you keep your extended model information outside the actual grid's model, the row you modified in the grid model may not be the row you think it is in your data outside the grid.
如果将所扩展的模型信息保留在实际的网格模型之外，那么在网格模型内修改的行放到网格之外的数据中时很可能不会如预期的那样。
For example, Digital Elevation Model (DEM) data points are equally arranged in a grid pattern.
例如，数字高程模型(Digital Elevation Model, DEM)数据点在网格图形中均匀排列。
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