• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

Raster is a method of data organization for spatial data. The data structure for raster data consists of rows and columns of discrete data points that inherently preserve the spatial relationships between the locations on the earth represented by the data points. While it is not always the case, the data “points” are usually represented as areas or “cells,” which are often rectangular. Thus, a digital camera image is a common example of a raster data set in which a rectangular pixel (picture element) is used to represent each data point. The terms pixel and cell are used some-what interchangeably, though pixel is more correctly used with respect to raster images.

The raster data structure is a widely used method of representing geospatial information. The format ...

  • Loading...
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles