Example: "https://www.arcgis.com/home/webmap/viewer.html?webmap=2def3f0c7be74f05af33ac87b8d03ef2"
The substring "http://www.arcgis.com/" is the portal URL
and substring "2def3f0c7be74f05af33ac87b8d03ef2" is the portal id.
Click on a location along the State Highway System (SHS), to
                                obtain the
                                Postmile
                                info. A red dot will
                                appear at the exact location you clicked on, and a green flag will appear with the
                                actual postmile info
                                at the nearest route. For greater accuracy, zoom in.
                                 The results, if any, will display any PM on the SHS which
                                    is within 100
                                    feet (30.48 meters) from the clicked point. 
If you wish to increase/decrease
                                    the search from the
                                    clicked point, enter a new tolerance below and
                                    click on the map.
                                
                                Clicked locations will be denoted by this symbol ![]()
                                Nearest PM found locations will be denoted by this symbol 
                                
                                
Enter the coordinates to find the PM info of the location(s).
                                    If you wish to increase/decrease the search from the location of the coordinates,
                                    enter a new tolerance.
Default tolerance is 32 feet (10
                                        meter) from the
                                        coords entered. The results will display a red dot which indicates the location
                                        of the typed coords,
                                        and the green flags which indicate the result(s)