Book excerpt: Corpus Dialectology combines the fields of corpus linguistics and dialectological mapping. It concerns documentation of linguistic variation and mapping of linguistic spaces and boundaries, while ascribing renewed importance to the methodology and the material itself, especially data processing and statistical analysis. This approach considers phenomena that have received little attention to date, such as migration, language contact, mobility and educational level, as well as the differentiation between rural and urban spaces. Transparently described and intersubjectively comprehensible encodings permit the enhancement of dialectometry in the context of Digital Humanities and further development of linguistic theories of variation and change, as well as different levels of structure (phonology, morphosyntax, semantics). This book contains nine chapters on ongoing corpus dialectological research projects. They discuss current issues of data collection, for example the validity of crowdsourced data, explore challenges and possibilities of data analysis and offer theoretical reflections on virtual Romance geolinguistics.