This topic introduces the basic concepts related to Raster SQL.

Concept Description
raster object The regular grid that represents a space. Each cell in a raster object is assigned an attribute value. A raster object can be a satellite image, a digital elevation model (DEM), or a picture.
cell or pixel The cell in a raster object, which is also called a pixel. The data type of cells can vary with the raster object, such as byte, short, integer, or double.
band The layer of the cell value matrix in a raster object. A raster object can have multiple bands.
chunk The portion of a raster object. The size of a chunk can be customized, such as 256 × 256 × 3.
pyramid The downsample version of a raster object. A pyramid can contain multiple downsample layers. Consecutive pyramid layers are downsampled at a scale of 2:1. Layer 0 stores the raw data.
pyramid level The level in a pyramid.
mosaic The operation to integrate multiple raster objects into an existing raster object.
interleaving The arrangement of pixels in a raster object. The interleaving types include band sequential (BSQ), band interleaved by pixel (BIP), and band interleaved by line (BIL).
world space The world coordinates (geographic coordinates) of a raster object.
raster space The pixel coordinates of a raster object.
metadata The metadata of a raster object, including the spatial range, projection type, and pixel type. The metadata of the remote sensing platform is excluded.