GPS-Navigation: Represent the MAP position in RVIZ

[nguyenphucvuongcdt]

Hi everyone, I’m practicing at 4. GPS - Navigation, in the Represent the MAP position in RVIZ uint, I want to get YOUR_ACCESS_TOKEN. I accessed this link ( https://www.mapbox.com/install/js/cdn-add/.) but I don’t know how to get YOUR_ACCESS_TOKEN. Can you help me?

[albertoezquerro]

Hello @nguyenphucvuongcdt ,

You need to create an account on Mapbox and sign in. Then you will be able to access your tokens area:

[nguyenphucvuongcdt]

I created an account. I tried running in rviz, but there is an error:

[nguyenphucvuongcdt]

I copy my access token from:

[nguyenphucvuongcdt]

and how to I represent my map of my city in rviz with map box? Thank you so much!. @albertoezquerro

[albertoezquerro]

Hello @nguyenphucvuongcdt ,

You need to publish GPS data into a topic, and set this topic in the Topic field of the AerialMapDisplay display. See how I have set the topic /gps/fix:

Besides this, it also looks like you have other issues with your TFs (map frame warning).

[nguyenphucvuongcdt]

thank @albertoezquerro, to publish GPS data into a topic, what’s node I have to launch?

[albertoezquerro]

You have to follow Unit 3 (and complete Exercise 3.1) to get the proper GPS data published.

[nguyenphucvuongcdt]

thank @albertoezquerro , I published GPS data following Unit 3 but it had an error:

[nguyenphucvuongcdt]

[albertoezquerro]

Hello @nguyenphucvuongcdt ,

The RViz error you showed is saying that it’s not receiving any data. Do you have a topic named /gps/fix, and is GPS data being published into this topic?

[nguyenphucvuongcdt]

thank @albertoezquerro , I have some questions: I use my computer to operate ROS system, if I have to connect Internet to get GPS data? Is my computer GPS receiver?

[albertoezquerro]

No, computers are not GPS receivers. You can get an external GPS receiver though and connect it easily to your computer through USB, for instance.

[nguyenphucvuongcdt]

Can you suggest me some external GPS receivers which are supported in ROS?

[albertoezquerro]

Hello @nguyenphucvuongcdt ,

I can’t suggest any since I’ve never used one before. I would start by having a look at the ones listed here though: Sensors - ROS Wiki