User guide: Click "Find me" ---show user current location.
Check checkBox on left side bar---choose the place you want to search
The place info will show on right bar
click the "show it" button below the place info ----show the nearest police and clinic on map with markers
check the checkBox on right sidebar after choooing one place----show the around shops
Factors that can determine where is not crowded
Within 0.05 mi^2 ,how many food,beverage,grocery shops.
Populaiton in this area.