well, there are a lot of ways to do this, some involve $$$ and some dont. well i can give you the non money idea first, if this is for a civic or non profit group you might be able to squeak out a student to do the work as a project, otherwise you can attempt to mess with google maps or something of the like. depends how much learning overhead you want, but it is pretty steep. otherwise the mapping/GIS software is way too expensive to get yourself. i work at SFSU geography dept, and we can try and set something up with a student, or if you want something more professional we the staff can put something together for cash.

lemme know
Jesse

ps. do you have the tree data or do you have to make it still?

if you get the map let me know!
it's my hood too and I would like one.

check out my photos site

www.photosbygerryd.com