identify and define the key aspects of data quality, including resolution, precision, and accuracy.Students who successfully complete Chapter 5 should be able to: This chapter explores the technologies and procedures used to produce positional data, and the factors that determine its quality. Resolution and precision are two aspects of data quality. In practice, positions occupy 2- or 3-dimensional areas as a result of the limited resolution of measurement technologies and the limited precision of location coordinates. In theory, a single position is a '0-dimensional' feature: an infinitesimally small point from which 1-dimensional, 2-dimensional, and 3-dimensional features (lines, areas, and volumes) are formed. A property boundary, for example, is made up of a set of positions connected by line segments. Like the letters that make up these words, positions are the building blocks from which features are constructed. Positions, then, are a fundamental element of geographic data.

We defined 'feature' as a set of positions that specifies the location and extent of an entity. As you recall from Chapter 1, geographic data represent spatial locations and non-spatial attributes measured at certain times.

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