received from DJI:

Dear Joe ,

Thank you for contacting DJI Technical Support.

At present,its feature is for flight route reference.
When you click it ，you can draw a route by finger on the map.
And then you can flight as the flight as a reference by your flight operation.

And it may have new update on this feature once the ground station feature released. FYI .

Hope that will be help.
Thank you for choosing to fly with DJI.

Best Regards,

DJI Tech support

received from DJI:

Dear Joe ,

Thank you for contacting DJI Technical Support.

At present,its feature is for flight route reference.
When you click it ，you can draw a route by finger on the map.
And then you can flight as the flight as a reference by your flight operation.

And it may have new update on this feature once the ground station feature released. FYI .

Hope that will be help.
Thank you for choosing to fly with DJI.

Best Regards,

DJI Tech support