When signing-up for a new account the username and password must be unique within our user-base. If someone has already registered the email or username you're trying to register you'll be prompted to choose another. Usernames must be at least 4 characters and passwords at least 6 characters.
Click on the icon for the social network with which you wish to authenticate your mapometer account.
This is only for creating a new account. Do not use this to add a network login to an existing account. Add a network to an existing account via the social settings after you login to your existing account.