recognize a MAP for shortest route.

DEAR FRIENDS,
I WANT TO CREATE A PORTAL WHO CAN ASSIST ROUTE TO STRANGERS FOR A PLACE,
IN MY PORTAL IF I WANT TO KNOW ABT DISTANCE BETWEEN 2 PLACES THAN I HV TO SIMPLY WRITE SRC AND DESTN NAMES AND AS A OUTPUT I WILL PROVIDE PATHS AND USER CAN CHOOSE ANY ONE AMONG THE SOLUTION PATH.
I HEARD ABT SOME GIS TOOLS.

IF ANYBODY CAN GIVE SUGGESTION FOR SOLVING THE SAME PROBLEM THEN I WILL BE THANKFUL TO YOU.

WITH THANKS?ARDS
RANJANA PATHAK