Meaning & Definition of word "Raster"
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Raster
/ˈræstər/
noun:
- 1. A raster is a grid of pixels or dots that represent images or data, commonly used in digital imaging, geographic information systems (GIS), and graphic design.
- Example: The satellite imagery was provided in raster format, allowing us to analyze land use changes over time.
- 2. In computer graphics, a raster refers to a data structure that represents a pixel-based image in two dimensions.
- Example: The graphic designer converted the vector image into a raster to ensure compatibility with the printing process.
- 3. In the context of GIS, a raster is a type of data representation that uses a matrix of cells arranged in rows and columns to represent spatial information.
- Example: The elevation data was stored as a raster, with each cell representing a specific elevation value.
Etymology
From the Latin 'rastrum', meaning 'a rake' or 'to scrape'.
Common Phrases and Expressions
raster graphics:
Graphics made up of pixels with defined colors.
raster scan:
A method of displaying images by scanning lines across the screen.
Related Words
pixel:
The smallest unit of a digital image or display.
vector:
A type of graphic that uses geometric shapes instead of pixels.
resolution:
The detail an image holds, usually measured by the number of pixels.