Spatial Raster Data 空间栅格数据
Raster data is non-geometric data defined by a grid of values covering a spatial area.
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。
However, storage might not be quite as important for raster data, whose spatial component likely contains fairly simple numerical data.
然而，存储可能不像栅格数据那样重要，其空间构成可能包含相当简单的数字数据。
It is essential to the spatial raster data structure of GIS; in fact, all spatial analysis about raster data is based on the digital topology.
数字拓扑主要研究栅格空间中离散几何对象的拓扑性质，这些性质在GIS空间分析和栅格数据处理中非常重要。
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