Hello. I am trying toi show my current track on a map by using LMineString block. So a build a global viariable to use its contents for the string. I am sure that the contents is good according the documentation of A2I but the LineString is never visible ! [image] Test_Map_Trace.aia (3.6 KB)

Oh, it doesn’t? Displaying a LineString works here LineStringMap.aia (3.6 KB) A guess is you have an issue with your code that you have to debug most probably. A guess is [misplacedBlocks] but there could be other issues. You might re-look at my example. Have you fixed it yet?

LineString to draw a track

MIT App Inventor Help

Frederic_Blanchard April 13, 2020, 3:30pm 3

I have a look at that discussion and i’ll send a message afer

How to broadcast a GPS location and share the information on a map with others in real time..CloudDB