A mosaic dataset is a collection of raster datasets (images) stored as a catalog and viewed or accessed as a single mosaicked image or individual images (rasters).

These collections can be extremely large both in total file size and number of datasets.

The metadata can be managed within the raster's record as well as attributes in the attribute table.

Storing metadata as attributes enables parameters such as sensor orientation data to be managed easily as well as enabling fast queries to enable selections.

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