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(Full disclosure: I live on San Jose Avenue and the e-mail from Jennifer Rosdail was forwarded to me.)

Danny Della Lana, who lives on the west side of San Jose Avenue in what was once considered the Mission District, had just discovered in an e-mail that the new map from the San Francisco Association of Realtors moved him into Noe Valley.

“This detracts from our hipster cred,” he wrote in an e-mail to neighbors. “Maybe after 40 that isn’t a bad thing as there is nothing more pathetic than an aging hipster.”

Jennifer Rosdail, with Paragon Real Estate Group, who sent the map to potential homebuyers, said in her newsletter that while it may seem academic to some, it can be important when trying to sell. Her good friends on San Jose, she said, “have had the luck to move from the Inner Mission to Noe Valley at no expense and without packing a box!” (Download our map of the changes. )

While the Mission is cooler, she added, Noe is more expensive.

“The simple placement of the line that moved the Noe border from their (her friends’) back fence (where it was for the prior 10 years or so) to the back fence of their neighbors across the street will change what searches they are included in,” she wrote; “how their property might be perceived and what buyers would be willing to live there. Ditto goes for areas annexed from Sunnyside and Miraloma Park by Glen Park.”

The map, she said, has been changed twice since she began selling houses in 2002. Some of the boundary changes she notes in her newsletter: