At http://www.meertens.nl/sand/zoeken/ you find data of 267 dialects of Dutch collected between 2000 and 2003 in the Netherlands, Belgium and Northern France. The data include the original sound files and transcriptions of oral interviews, as well as the results of a postal and telephone survey. The database comes with a search engine and a cartographic tool that enables the researcher to visualize search results on maps. The database is particularly relevant for linguists interested in the left periphery of the clause (e.g., complementizers, complementizer agreement, relative clauses, Wh-clauses, subject pronouns and subject pronoun doubling), the reflexive system, the verbal system and negation.