My Google Maps: Duke Ellington And The 1930 Census

here's a link to my google map on harlem where the image below comes from.
According to Ephemera Press' Harlem map Duke Ellington lived at 935 St. Nicholas Ave. However in the 1930 census I found him living at 381 Edgecombe Ave., apt. 142. He lived there with his mother Daisy, his sister Ruth and his son Mercer.