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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
| Error | Sources
| Types | Managing
| Management
Error is introduced at
every step of the process of generating geographic information. It is impossible
to eliminate error completely from GIS processing, the best we can do is manage
it and acknowledge that it exists.
Sources
of error
Types of error
Managing error
Sometimes trade offs have
to be made. It may not always be cost-effective to reduce the level of error
and it may not always be necessary to reduce the uncertainty in the data set
for the level of detail required in the GIS output.
Read
Reading 2.2 Burrough and McDonnell chapter on error
Do this - Predicting error - Why?What errors you might encounter in your GIS if you were setting up an environmental GIS that made use of classified satellite imagery, data typed in at the keyboard and a digitised land cover map.
What might the implications be for your output after analysis if you don't try to reduce these errors?
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