The spelling of "Hartlea" can be explained using the International Phonetic Alphabet transcription. The first syllable "hart" is pronounced as /hɑːt/, with the "a" being a long sound. The second syllable "lea" is pronounced as /liː/, with the "e" again being a long sound. The word "Hartlea" does not follow any common spelling patterns in English and is likely a unique name or place. Phonetic transcription is a useful tool for understanding the pronunciation of words with unusual spellings.