Get coordinates from list of markers

MIT App Inventor Help
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1

Hey there!

I'm working on a GPS-based game for my daughter's school class. Now I’ve run into a problem:

I have several markers that I placed manually in the Map component (in the Designer), and I want to check in a method whether the user is within 50 meters of any of these markers.

blocks (6)

The issue is:
I want to access marker.Latitude and marker.Longitude, but I can’t change the loop variable to access these properties. The blocks don't let me plug get marker into Marker1.Latitude.

How can I properly get the Latitude and Longitude of each marker inside the loop?

Thanks so much for your help!

2

You need one of these for lat and another for long:

blocks
blocks702×104 11.2 KB

Assuming Riddle is from a list of Marker components, feed it Riddle instead of my sample marker.
The little pulldown can switch among marker attributes.

3

Check the Marker method blocks.

This sounds like something that can be done by a Marker block.

4

Sorry. You can not do that directly. You either need a global variable representative of those latitude and longitude coordinates or try something like recommended by abg.

See Social Distancing ... a CloudDB / Location Marker Tutorial
for making a facy app that will determine how far a marker is from another.

5

Now i got it! You can make generic Blocks, that was what i have missed. Thank you!

6

That was a better solution!

blocks (7)
blocks (7)1298×230 32.4 KB

Thank you for that!