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MODIS level 2 grid with the ISIN map projection

The Moderate Resolution Image Spectroradiometer (MODIS) land data products are stored using the level 2 grid (L2G) approach. We describe some improvements, which includes a scheme for more accurate observation coverage calculations, and a set of selection rules for reducing the size of L2G storage. Also, we describe the improvement on the nesting scheme for different size grid cells of the global grid defined by the integerized sinusoidal (ISIN) map projection.