... 光栅图形，光域图形 raster graphics 光栅网格 raster grid 光栅影像档案格式 raster image file format ...
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As raster grid networks of digital elevation model in GIS can be used as the finite difference mesh, the continuity and momentum equations are solved numerically using the finite difference method.
由于GIS中的栅格网络数据可以直接作为有限差分的网格，二维数值模型可用有限差分来求解。
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。
Taking a 10-meter-by-10-meter grid and making one observation for each intersection (100 observations) would constitute a raster dataset.
比如 10 米乘 10 米的网格，取每个交叉点的值（共有 100 组）就形成一个光栅数据集。
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