confusion between TF about rviz_satellite HOT 3 OPEN

They are in the ENU frame (true east north and up frame).

Frames should adhere to REP-105

In this case, what is the definition of the map frame?

There should be a map frame present and the frame_id of your GPS message should be part of the same TF tree as the map frame.

Is the base_link needed for this plugin?

No

from rviz_satellite.

I publish the origin gps cords (as NavSat msg) of map frame (satellite image) only once. Is this the intended way for the plugin?

from rviz_satellite.

I think the intended way is to keep streaming GPS data. As the assumption is that the robot moves.
But I guess it should work by only publishing it once as latched topic. Because this plugin needs to receive the data at least once.

from rviz_satellite.