[Bug]: GNSS Coordinate System transformationn not exact enough

[robertik10]

Current Behavior

Blue graph shows the error between current location and transformed sensor values from the ideal gnss sensor.
The red graph shows the error between current location and the ideal Carla Location values.

Expected Behavior

Both graphs should be the same, but they aren't.

Reason:

• Maybe carla location and gnss location look at two different points of the car (very likely)
• Maybe the transformation of the gnss data is not exact enough

How to reproduce the issue

Run the project from the #78 branch and look at the rqt_graph.

[robertik10]

solved by @samuelkuehnel :))