Advantages and Disadvantages of Raster Versus TIN (Especially for GATE-Geospatial 2022)

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GIS packages can convert from one to the other. It differs in data flexibility and computational accuracy.

Image Shows Raster Versus TIN

Raster

Effect of Grid Size on Surface Representation

  • Sampling interval will affect
  • Amount of detail captured (accuracy)
  • Amount of storage (redundancy, efficiency)
  • Optimum sampling interval depends on the nature of the terrain
  • Raster DEM & TINs

TIN

  • Each vertex must have the following information
  • Height
  • Connectivity information
  • Surface normal
  • The triangle legs can be forced to coincide with the break lines

Raster vs. TINs

Table Content of Raster vs. TINs
TINGRID
Advantages
  • Ability to describe the surface at different level of resolution
  • Efficiency in storing data
  • Easy to store and manipulate
  • Easy integration with raster databases
  • Smoother, more natural appearance of derived terrain features
Disadvantages
  • In many cases require visual inspection and manual control of the network
  • Inability to use various grid sizes to reflect areas to different complexity of relief

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