Pixhawk 4 mini GPS wrong altitude

Dear people.

I do have a pixhawk 4 mini with GPS pixhawk 4.

It turns out that when I place the drone on the ground I get an altitude of 270 and in google maps it shall be of 225. There is an offset.

I am wondering what can be wrong? why do I get a wrong altitude?

Is there any parameter I can manipulate?

Thank you :slight_smile:

Hello Google indicates a geographical altitude, the altitude that gives the Pixhawk PX4 is barometric (Barometer: MS5611) and it changes according to pession measured in Pascal, Hpa.