fix max map zoom, and set walk to 1/2 mile
fix max map zoom, and set walk to 1/2 mile

LACMTA/loader,OpenTransitTools/loader,LACMTA/loader,OpenTransitTools/deploy,OpenTransitTools/loader,OpenTransitTools/loader,OpenTransitTools/loader,LACMTA/loader,LACMTA/loader,OpenTransitTools/loader,LACMTA/loader,OpenTransitTools/deploy