Cookies
This site uses two different cookies.
The first cookie, which is saved for 30 days, contains information about the map view of the visitor. This is used while browsing the site, to save the map state between page loads. It also means the user can start directly from the previous point when coming back to the site some days later.
The second cookie is a session cookie, meaning it will be deleted when you close your browser. It's used to verify a logged in user.
None of these cookies contain any personal information.
If you don't want to accept cookies, you can set up your browser to automatically deny them, or to ask you any time a site tries to save a cookie. Through the browser you may also delete previously saved cookies. See the help pages for you browser for more information.