Google Maps app crashes on open for iPad
Deleting a downloaded app does two things:


Jettisons the data (like a reset for that app)
Allows for a clean copy of the app to be downloaded again


You could restore the entire device and test maps before restring your backup or you could back it up and erase all content and settings and then test.

Flip a coin if one of those two options does not seem better to you and feel free to ask a follow on question if you find some more details to add to the question and don't want to edit them into the existing question.