Coordinates show your position on the map. They are given under the following system:
[F(front)n ; Xnn ; Ynn]
When tapping on any tile, be it a terrain, resource tile or base, you will see its coordinates. To go to a place with fix coordinates, you can tap on the Radar button (center up, Front view) and add the coordinates you want.
To copy the coordinates of a Base, Rebel or Resource Tile on the map, simply tap on the “Copy Coordinates” button and they will be copied on your Clipboard.