Image as map input

Hello,
Is it possible to use an image as a map to either click to input coordinates as x and y values or to plot the coordinates back onto the image? I've done lots of searching but can't find anything.
I want this feature to mark locations on a site plan or equipment drawing. Not a Google map.
AppSheet does something similar here: https://www.appsheet.com/samples/Track-company-assets-across-facilities?appGuidString=46a0a56f-d28c-4485-ad99-f62563893f3e
Thanks,
Marty
Answers
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The only thing I can think of that would be similar would be the Proofing feature. Have you looked into that yet?
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Hello, sorry for the late reply.
Thanks for the suggestion. I had a look at proofing, but at a glance I don't think it'll work as it's a very different use case.
I will look into integrating Appsheet and Smartsheet and/or some other option for Smartsheet.