Should I delete my meetup materials or simply remove the poster image?

[ErmesT]

@Ranu5g

"This is just one picture from Google Maps, and I have made 80% edits to it

The answer is simple, @Ranu5g

@TraciC

We’re original. We post our own words, photos, and videos that we’ve created just for Connect. We don’t share content that we don’t have the rights to.

Editing a photo not taken by you do not makes that photo an original content, but simply a modified “stolen” content.
Let imagine to replace the word “photo” with the word “car”. If you steal a car, modifying it will makes that car yours? I think you have the answer already.
For an deepest analysis you can read A Reflection on "Original Content" - What if this Photo ... is Yours?
Never use contents that are not created by you. This is not an opinion, it’s a rule.

@DeniGu

Only share photos you have taken yourself or received permission to use directly from the copyright owner. Do not download and post photos from Google Search, Google Maps, social media, stock photo websites, or elsewhere on the internet without receiving permission from the owner of that photo.

Please delete it. You don’t need to delete the recap, but only what is not yours.

Just an additional note. Do you know that in some country for the use of a single photo without an explicit permission from the author you can be fined up to 3000 €?
There are photographer that are becoming rich just because someone takes their photo from the web