English: This map is based on Labov et al's 2006 Atlas of North American English (p. 48), showing metropolitan areas where at least one documented speaker exhibited 50% or higher non-rhoticity in their speech.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.