Geographic Information Systems
Data Quality Issues

Mark Foley
mark.foley@dit.ie

Data Quality Issues

Accuracy versus precision

Accuracy versus precision

Resolution and generalization of raster datasets

Resolution and generalization of raster datasets

Scale-related generalization

Scale-related generalization

Sources of Error

Conceptual view of uncertainty

Conceptual view of uncertainty

Two mental maps of the location of Northallerton in the UK

Two mental maps of the location of Northallerton in the UK