Garbage in is garbage out as they say. High quality attribute data will make your QGIS experience that much more fun. Luckily QGIS has some neat, but perhaps overlooked possibilities for validating attribute data against your own rules.

When creating or editing data you can use forms which can help prevent errors. But what about validating a dataset you got from a colleague or client? Think of those spreadsheets with many typing errors, hidden spaces and text instead of numbers. You can quickly validate those files over and over again in QGIS, without the need of any plugin.

This talk will show you three approaches. From settings constraints in Attributes Form and getting a strong visual feedback in the Attribute table up to the use of a QGIS Model to create a dataset with all errors and a summary with error statistics. Get some tips how to check against ranges and value lists, check against specific syntax requirements and quickly find non unique values.