Spatial data usability can be effected by differences in data structures, geographic scale and language. A lack of guiding principles may cause dataset fragmentation, gaps in availability,incompleteness and duplication of information. To ensure the usability of data there are several vital dimensions and elements that should be included. It is important to incorporate data usability and "tidy" dataset techniques as a tactic to reduce the time needed to clean, verify and test datasets usability prior to manipulate.
There are multiple dimensions to data usability:
Source: Directions Magazine (2010) Evaluating the Usability of Aggregated Datasets in the GIS4EU Project http://www.directionsmag.com/entry/evaluating-the-usability-of-aggregated-datasets-in-the-gis4eu-project/122329