Land cover changes are the results of natural processes, such as: climate variations, volcanic eruptions, changes in river channels or sea level, etc. However, most of the land cover changes in present and from the recent past are due to human actions. CORINE Land Cover is one of the most relevant Land Use Cover (LUC) databases in Europe because of its degree of detail and long time series. In this context, it is a requisite to have data sources assurance and to provide reliability in the field through evaluating the accuracy of the databases, in order to provide a reliable indicator to the user. Viewed as a major knowledge gap, the accuracy of the data from the CLC project has been widely addressed by numerous researchers, who have analyzed the data sets to determine their degree of confidence. By comparing various data sources: orthorectified aerial images, satellite images, national data sets, field surveys, digital terrain model, and by implementing the methodologies described in specialized studies or in personal research, it was noted that CLC datasets are suitable when used with a series of limitations.