The photo was posted Monday on Reddit under the title "This 'Travel Alberta' ad forgot Nunavut exists" and has since gone viral, with the original image being viewed over 57,000 times.
Travel Alberta, the tourism marketing agency of the Government of Alberta, has since pulled the ad from circulation and apologized for the mistake.
"We sincerely apologize to Nunavut. We simply didn't make a good enough job at making sure that that advertisement message was as good as it could be," said Travel Alberta's CEO, Royce Chwin.
He says the map was pulled from an external source, and then stylised according to Travel Alberta's brand. "I think in simply stylizing the map, that specific detail [Nunavut's borders] was left out."
Colleen Dupuis, CEO of Nunavut Tourism, said they are working with Travel Alberta to make sure this doesn't happen again.
She said it was "an honest mistake on their part," but that more overall education and awareness about Nunavut is needed.
"One of the things we're trying to do with the government right now is to do an awareness campaign of Nunavut, not from a tourism point of view, but just overall awareness. We expect to roll that out in January," she said.