Linked from
The 10 pages that link to Isogloss, each with the reason it gives.
DialectsBroader topic: Bundles of isoglosses can outline regions with distinctive dialect features.
DialectologyRelated: Isoglosses map where a dialect feature changes across space.
Phonemic mergerRelated: The geographic edge of a merger can form a dialect boundary.
LimburgishRelated: Isoglosses help explain why Limburgish classification changes across the region.