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ENV510 Landscape Ecology and GIS
Definitions
& descriptions | Concepts
& issues | Setting
up GIS | Using
GIS
| Applications
Representation
| Spatial data | Referencing
| Data issues
| Accuracy
| Micro-level
| Positional | Attribute
| Logical | Resolution
| Macro-level | Usage
| Error | Management
The resolution
of a data set is defined as 'the smallest discernible unit or the smallest unit
represented' (Aranoff,
1989).
For satellite
images, the spatial resolution is equivalent to the size of the pixels making
up the image. A pixel is the area of the Earth's surface represented by a single
image value.
For thematic
maps eg soil or land use maps, the resolution of the data is equal to the size
of the smallest object that is represented, that is the minimum mapping unit.
It is important to note that data are produced at levels of accuracy and resolution that make them only appropriate for use at certain scales.
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