[DM3-2] The raster model

The raster data model holds values in a regularly spaced matrix of cells arranged in rows and columns covering a two dimensional space. Rasters are commonly used to store continuous data like colors in an image and height values but they are also used for discrete (thematic) values like land use.

External resources

• Briese, C. (2010). Extraction of Digital Terrain Models. In G. Vosselman and H-G. Maas (Eds.), Airborne and Terrestrial Laser Scanning (pp. 135-167). Dunbeath, Scotland: Whittles Publishing.
• Freeman, H. (1974). Computer processing of line-drawing images. Computing Surveys, 6, 54-97. DOI: 10.1145/356625.356627
• Karim, H, Abdul Rahman, A, & Mohd Salleh, M. R. (2019). MULTI-SCALE AND SCALE DIMENSION PROPERTIES IN SPATIAL RASTER MODELLING – CONCEPT AND CURRENT IMPLEMENTATION. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XLII-4/W16, 339-345. DOI: 10.5194/isprs-archives-XLII-4-W16-339-2019
• Pingel, T. (2018). The Raster Data Model. The Geographic Information Science & Technology Body of Knowledge (3rd Quarter 2018 Edition), John P. Wilson (Ed.). DOI: 10.22224/gistbok/2018.3.11

Learning outcomes

• 653 - Define basic terms used in the raster data model (e.g., cell, row, column, value)
  Define basic terms used in the raster data model (e.g., cell, row, column, value)
• 654 - Explain how the raster data model instantiates a grid representation
  Explain how the raster data model instantiates a grid representation
• 655 - Interpret the header of a standard raster data file
  Interpret the header of a standard raster data file
• 656 - Compare and contrast the raster with other types of regular tessellations for geographic data storage
  Compare and contrast the raster with other types of regular tessellations for geographic data storage
• 657 - Compare and contrast the raster with other types of regular tessellations for geographic data analysis
  Compare and contrast the raster with other types of regular tessellations for geographic data analysis
• 658 - Write a program to read and write a raster data file
  Write a program to read and write a raster data file

Self assessment

Outgoing relations

• [DM3-2] The raster model subclassof [DM3] Tessellation data models