This example demonstrates the use of the gmf-permalink
service, which is injected inside the gmf-map directive.
The following links demonstrate the different features:
map_x and map_y if those parameters
are set, otherwise it is added at the center of the map.
map_x and
map_y if those parameters are set, otherwise it is
added at the center of the map.
gmfPermalinkOptions to customize the permalink crosshair
feature style.