9/ By contrast, Gilliéron is known for direct data collection.
In his first publication, Petit Atlas Phonétique du Valais Roman (Sud du Rhone), 1880, Gilliéron gathered necessary data by hiking through the southern Rhone valley, manually transcribing phonetic differences between small villages in the region. This data was then plotted onto a series of maps.
10/ Gilliéron most famous project is the Atlas linguistique de la France (ALF), which was first published in 1902.
He employed a field worker, Edmont, to travel to 638 locations in France to transcribe data and produce 1,900 maps.
It was also the first atlas to layer in sociolinguistic data, such as on age i.e. “chez les jeunes” (among young people).
This work is also now online: https://lig-tdcge.imag.fr/cartodialect5/#/
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