Use the Google Maps API to add and delete lines on a map

 

Load Map
Function load ()
{
// Checks whether the current browser supports Google Maps.
If (gbrowseriscompatible ())
{
Map = new gmap2 (GetObject ('map '));
// Add built-in controls to the map

Map. addcontrol (New gmaptypecontrol ());

// The pan and zoom controls (upper left corner ),
Map. addcontrol (New glargemapcontrol ());

// Scale controls (lower left corner ),
Map. addcontrol (New gscalecontrol ());

// Thumbnail Control (lower right corner)
// Map. addcontrol (New goverviewmapcontrol ());

Map. enabledoubleclickzoom ();
Map. enablescrollwheelzoom ();

// Move the view to Shenzhen
Map. setcenter (New glatlng (22.550000, 114.030000), 12 );
}
}

 

Add line

Function addpolyline ()
{

VaR polyline = new gpolyline ([New glatlng (22.5500, 114.0300), new glatlng (22.5600, 114.0400), new glatlng (22.5700, 114.0500)], "# ff0000", 3 );
Map. addoverlay (polyline );

}

Strikethrough

Function removepolyline ()
{
Map. clearoverlays () // removeoverlay (); // or gmap2.clearoverlays ();

}

 

You can also use the following method to add a line:
Function addpolyline ()
{
VaR points = [];
Points. Push (New glatlng (22.5500, 114.0300 ));
Points. Push (New glatlng (22.5600, 114.0400 ));
Points. Push (New glatlng (22.5700, 114.0500 ));
Points. Push (New glatlng (22.5800, 114.0600 ));
Points. Push (New glatlng (22.5900, 114.0700 ));

VaR polyline = new gpolyline (points, "# ff0000", 3 );
Map. addoverlay (polyline );
}