I recently got a Pixel and installed GrapheneOS on it. I would like to add some places to the map. Is there anything I need to know regarding preserving my privacy while contributing?
Every edit will have your username on it. If you edit a lot in certain areas, one might guess that you live/work around there. Other than that, I doubt there are any such considerations.
Some apps allow uploading photos when making a note. These services may not clear some of the metadata, though geolocation is already obvious from the note itself.
Changing your username does nothing, because you have a unique, unchanging user ID. Just use something you don's use anywhere else. Reputation is important in collaborative projects. You want to be known as a member that knows what they're doing, and then you can be as anonymous as you like.
I don't think that changes your underlying account ID.
Whatever you do you need to make sure that you are contactable through the email address(es) you supply. If there is a problem with some of your edits and you don't reply to queries you may have your account(s) blocked and all your edits reverted.
Would it be better to maintain the username but just make it something that you don't use anywhere else? I don't know the wider OSM community, but I assumed it was similar to contributing on Wikipedia where reputation is helpful.
Posting at random times could help, as well as gathering a lot of data and contributing it at one time
I understand that, but in what way? I know I need to sign up, but I will be using a screen name. Is there anything that would tie me to edits, assuming I upload them randomly?
As others have said, you can probably best keep anonymous by setting up an account separate from any other online identity. You can help contribute to random areas, and a lot of people do. Of course it is more valuable to you and to the community to edit near where you live, but yes, there is a certain amount of ability to identify someone's locality based on their edits.
I'm very privacy conscious so I'm careful what I ask/share in this and other online spaces so that it would be difficult to connect.
My home area is well mapped, I travel to a few other places both for work a pleasure that are not. That's where I would like to add data for anyone else interested.
I keep my identities separate for everything I do online. Thank you
I just had a thought - you could pick out 3-4 fixed areas that need a lot of edits and alternate between them. Then your location would be somewhat obscured. You can do a lot of good work with satellite imagery and public records. Plus if you ever end up visiting, you'll really know your way around!