Advantages and Disadvantages of Raster and Vector data model
Raster and vector data both are the spatial data type.
Both data structure play important role GIS data model. In this study we
discuss some advantages and disadvantages of raster data and vector data model.
Advantages of
Raster-
1. It is simple data structure.
2. The best way to represent continuous features data.
3. Overlay operations easy to perform.
4. Due to same
cell size it is easy for simulation.
Disadvantages of
Raster-
1. Difficult to perform coordinate transformation
process.
2. Difficult in topological representation.
3. The cell-size determines the feature resolution.
Advantages of
Vector-
1. Projection transformation can be done smoothly.
2. Easily edit
the data and Graphic output is usually aesthetically pleasing.
3. Connects
easily between topologies and networks.
4. High spatial resolution.
Disadvantages of Vectors-
1. Difficult to
represent continuous data.
2. Time
consuming and expensive.
3. Complex data structure.
|
Characteristics |
Raster data |
Vector data |
|
Introduction |
One type of spatial data that made up of a square
grid of pixel. |
Type of spatial data that comprised of vertices and
path. |
|
Nature of data |
Continuous data |
Discrete data |
|
Representation |
Data’s are represents in cells or pixel. |
Represents data using line, point, polygon symbol. |
|
Data structure |
It is a simple and low cost data structure |
It is complex and expensive data structure. |
|
Locations identifications |
The raster data model uses a series of cells or
pixel to represent locations on the earth. |
The vector data model uses point and line segments
to identify locations on the earth. |
|
Overlay operations |
In raster data overlay operations are easily
implemented. |
In vector data overlay operations are difficult to
implement. |
|
Example |
Temperature, rainfall, elevation are some example of
raster data. |
Administrative boundaries and Linear features like
road, river are some examples of vector data. |
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