The Atlas of North American English: Phonetics, Phonology and Sound Change (ANAE; formerly, the Phonological Atlas of North America) is an overview of the pronunciation patterns (accents) in all the major urbanized regional dialects of the English language spoken in the United States and Canada. It is the result of a large-scale survey by linguists William Labov, Sharon Ash, and Charles Boberg. It traces sound changes in progress in North America in the 1990s, and seeks to redefine dialect boundaries based on acoustic analysis of speech samples.
ANAE employs a "binary" phonemic notation system designed to be maximally abstract and economical so that it can be used to describe chain shifts with ease. The checked vowels are represented by single letters, and each of the diphthongs and historically long vowels is represented by a nuclear vowel followed by a glide, /y/, /w/ or /h/. /y/ represents any kind of front upglide [j, i, ɪ, e, ɛ], /w/ represents any kind of back upglide [w, u, ʊ, o, ɤ], and /h/ represents an inglide or long monophthong. The following tables provide a comparison between ANAE's notation and Wikipedia's diaphonemic transcription system.