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:
really helpful!!!!!!!!
doesn't raster get distorted on enlargement????
Thanks for sharing the blog. I learned a lot from it!
Raster to Vector
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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