This topic describes the terms related to Raster SQL.
| Term | Description |
|---|---|
| raster object | The regular grid that represents a space. Each cell in a raster object is assigned an attribute value to represent a data model of an entity. A raster object can be a satellite image, a digital elevation model (DEM), or a picture. |
| cell/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 measure of a single characteristic of a raster object. A band is represented by a single matrix of cell values. A raster object can have one or more bands. |
| chunk | The portion of a raster object. The size of a chunk can be customized, such as 256 × 256 × 3. |
| pyramid | The downsampled version of a raster object. A pyramid can contain one or more downsampled layers. Consecutive pyramid layers are downsampled at a scale of 2:1. Layer 0 stores the raw data. |
| pyramid level | The layer in a pyramid. |
| mosaic | The operation to integrate one or more raster objects into an existing raster dataset. |
| 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 geographic coordinates of a raster object. |
| raster space | The pixel coordinates of a raster object. The top-left corner of the raster object is used as the starting point. |
| metadata | The metadata of a raster object, which includes the spatial range, projection type, and pixel type. The metadata of the remote sensing platform is not included. |