How to Clean & Validate Data?

The validation process plays a critical role in maintaining high standards and improving the quality of data in a mapping project. Mapping work performed on a voluntary basis by non-professionals must undergo validation to ensure accuracy and consistency, which are essential for reliable information on the map.

The validator's responsibility is to ensure that the mapping work meets the project's specifications and is executed correctly. In evaluating each task, completeness and correctness are the two crucial aspects that must be considered. Completeness refers to identifying all the elements accurately, while correctness entails ensuring that mapped entities are geometrically and semantically correct. Therefore, during the validation process, errors must be detected and corrected. However, for teaching purposes, it is also essential to encourage mappers to correct their own work and become aware of the project's overall goals, rather than just correcting errors during validation.