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Vector Data Vs. Raster Data

Vector Data

  • Represented by point, line and polygon.
  • Relatively small file size (small data volume)
  • Excellent representation of networks.
  • A large no. of attributes can be attached, hence more information intensive and a number of thematic maps can be prepared from a single layer.
  • Features are more detailed & accurate.
  • Creating, cleaning and updating data is more time and labour consuming.
  • Topology-based analysis & operations are easier to perform (like network analysis etc.).
  • Can not represent continuous values like land use, elevation etc. very well.
  • Assigning projection and transformations are less time taking and consumes less memory of the computer system.
  • Topology makes data structure complex.

Raster Data

  • Points, line & polygons everything in the form of Pixels.
  • File size is larger than vector data.
  • Networks are not so well represented.
  • Only one pixel value represents each grid cell.
  • Generalization of features (like boundaries) hence accuracy may decrease.
  • Simulations and modeling is easier (spatial analysis, terrain modeling etc.).
  • Maintaining is easier.
  • Excellent for representing data containing continuous values (like land use, elevation etc.)
  • Coordinate-system transformations take more time and consume a lot of memory.
  • Grid cells or pixel makes simpler data structure.

5 comments:

Unknown said...

really helpful!!!!!!!!

Unknown said...

doesn't raster get distorted on enlargement????

Julia Robert said...
This comment has been removed by the author.
Clipping Path Express said...

Thanks for sharing the blog. I learned a lot from it!
Raster to Vector

Jennifer said...

Great tutorial on vector art services and also great tips to convert raster to vector art and other types of graphics. It's useful. Thanks a lot.

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