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此特性可充当所有字段／非空间数据和几何数据的容器。
The feature acts as a container for all field/nonspatial and geometric data.
光栅数据 是由覆盖空间区域的网格值所定义的非几何数据。
Raster data is non-geometric data defined by a grid of values covering a spatial area.
计算机图形学的特点之一是广泛地使用三维几何数据来描述场景。
The property of computer graphics is that the three dimensional geometry data sets are widely used for various purposes.
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