I see a lot of the same code about 4 times here.
Can you create a function and send in the parameters that are different like the id of the ol interaction, the type (square, circle, custom). Maybe a boolean for the things you do for the last 3 but not in the clear one?

And is it a Quadrangle or a Square?

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Issue created for https://opensource.ncsa.illinois.edu/bitbucket/projects/GEOD/repos/geodashboard-v3/pull-requests/57/overview?commentId=11224