这种方法遵守名称空间覆盖规则，因此只有距离最近的名称空间定义是有效的。

This approach respects the namespace overridden rule so that only the closest namespace definition takes effect.

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散射计和辐射计数据具有较大的空间覆盖和快速重访率，这使其成为联系监测南极冰盖的极好工具。

Scatterometer and radiometer image data have a greater spatial and more frequent coverage, albeit at a lower spatial resolution, making these instruments ideal for monitoring the Antarctic ice sheet.

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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.

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