How to delete markers

i use maps (not google maps) and i create a markers with the block blocks%20(1).
after that i want to reset the map, with a button, and delete all the markers, but i don’t find a block that make it.
is there a way to reset the map?
thanks

Then set when button click do set longitude & latitude = empty…

This will be helpfull i hope. Google is your friend.

https://groups.google.com/forum/#!category-topic/mitappinventortest/specific-programming-issue/TzgV7czL-mY

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