Dimension Quality Dimensions Description Example of Non-Quality Data Completeness How well the dataset captures all of the features it is The # of features in geometry matching the existing number of features (Features) intended to represent. Positional Describes how close the locations of objects The river feature is within + or 10 feet of where it is actually located. – Accuracy represented in a digital dataset correspond to the true (Normally stated in a +/- factor in some unit of measure ) locations for the real world entities Logical The presence, absence or frequency of inconsistent Comparison of feature data in one layer compared to another. Roads Consistency data do not normally go through large lakes. Attribute Summarizes how different the attributes are from the Accuracy true values. Geometric Defines whether the geometry of a raster data set is Accuracy located correctly in terms of a pixel or cell location. (Raster) Radiometric Described as the pixel values for each cell that are Accuracy collected for each band of digital imagery. (Raster) Sample Data for Practice
Dimension Quality Dimensions Description Example of Non-Quality Data Completeness (Features) How well the dataset captures all of the features it is intended to represent. The # of features in geometry matching the existing number of features Positional Accuracy Describes how close the locations of objects represented in a digital dataset correspond to the true locations for the real world entities The river feature is within + or – 10 feet of where it is actually located. (Normally stated in a +/- factor in some unit of measure ) Logical Consistency The presence, absence or frequency of inconsistent data Comparison of feature data in one layer compared to another. Roads do not normally go through large lakes. Attribute Accuracy Summarizes how different the attributes are from the true values. Geometric Accuracy (Raster) Defines whether the geometry of a raster data set is located correctly in terms of a pixel or cell location. Radiometric Accuracy (Raster) Described as the pixel values for each cell that are collected for each band of digital imagery. Sample Data for Practice
Data%20Quality%20Practice%20Sheet.docx