Can I use robot_localization if I only have GPS data? [closed]

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Yes. It is possible to use robot_localization if we only have GPS. Maybe you can use gps_common package to change the format of gps message and send it to robot_localization. I use smartphone to receive GPS which is already kalman filtered in gps chips. So I have no need to use robot_localization.

And how do you get a world map without robot_localization? I thoght it was necessary.

For my project, I only need relative trajectories of robots. And I can get longitude, latitude, velocity from smartphone using location api. It is enough for me. I don't know what you need for your project.

Thanks for your answers. I want to use robot_localization, but i am a bit lost with tf transforms, but i will figure it out.