Apparently Los Angeles city law is similar to our own in that any tree limb that branches over a dividing fence becomes the property of the receiving person. If that branch happens to carry a load of fruit then the fruit becomes the property of the person who has it hanging in their yard.

"Possession is nine-tenths of the law"

But what happens when the branch hangs over council property? It becomes public fruit.

Three local professors; Dave Burns, Matias Viegener, and Austin Young came across this archaic law and began mapping where this fruit was. Lemons, figs, loquats, avocados, persimmons, bananas, peaches and the list goes on.

The public can add trees to their map or use it to locate fruit that's in season.

Link 1, Link 2