The Battle of New Orleans was mostly fought between The Mississippi River (South Side) and the Forty Arpent Canal (North Side). If you turn north off of Judge Perez drive anywhere in Chalmette, it is where just pass the the end of the street. There is a levee there. On the (East Side) is Perrine Drive, the first street in Arabi, Macarty Canal is on the east side of Perrine. To the east Maurine Lane, Jumonville Canal, there was a marker on St. Bernard Highway marking Jumonville, the canal is east of there, near Maurine Lane. From the Google map it looks like almost everything has a house on it. There was a ball park on the Forty Arpent, but I really do not know the name of the street it was on. I never Metal Detected there, but I should have.
Note: As I recall, most of the canals running alone the the plantations were being replaced with culverts and covered, "mosquito control" I really think you might do better looking north of Murphy Oil, The area was used by the British in 1814 and the U.S. Army during the Civil War, but go in the winter when the snakes are gone. There was a place you could park on Judge Perez just past Jacob Drive, plus dead end streets off of of Jacob, but you had to cross the canal. De La Ronde Oaks was always good to us. I was a tradition on Sunday for the Ladies of the plantations to through coins from the second floor balcony to where the slaves had gathered. They thought it great interment to watch them scramble and fight for the coins. I am sure Mark and I did not find all of them, or the dropped bullets.
Before I left Chalmette, I placed all of the coins I had found in four 12x12x6 boxes and called my four children. #1 son, gave his to his son, his wife divorced him and he did not see his son for over thirty years. #1 daughter was arrested a week later for possession with intent to distribute cocaine, went to prison, got out and killed herself in a one car accident. Son #2, sold most of the silver coins, later gave the rest to his daughters. Daughter #2, sold hers and used the money as a down payment on a house for her and her boyfriend, and lost the house within the first three mounts.
After that, I started metal detecting in Mississippi, everything that I had found along with almost everything I owned was lost in Hurricane Katrina. I find it physically hard to get back into it.