Types of error
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Absolute Error Position on Earth's surface Measured in distance units (eg meters) Needed to reference data layers to one another |
Relative Error Relative size and position of things Measured as ration |
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Topological Error Connections and other spatial relationships of objects in the database Measured as % eg topology of lines and polygons representing objects such as rivers |
Referential Error Labels and values of objects Measured as % eg names of cities on a map |
