Privacy

Updated 1 September 2026.

This document outlines policies and procedures relating to the collection, use and disclosure of your information when you use the bergmaker.net Iceberg Charts website, operated by Nathan Jolly (“The Operator”).

The Operator may vary the Website Privacy Policy at any time. Amendments will be effective upon posting of updated terms to bergmaker.net. Your continued access after such posting constitutes your consent to be bound by the Website Privacy Policy as varied. You may cease using the website if you do not agree to the variation.

What is collected when you use the site

Signing in is optional. You can browse and read every public chart without an account.

For users without an account, we collect the following information:

• View counts — when you view a chart, we increment the chart’s view count, but do not preserve any other data.
• Your IP address — this may be used for rate limiting, and written to ordinary server request logs. Your IP address is not stored in the website’s database and is not associated with your account.

If you sign in using GitHub or Google, we will also store the following additional information:

• The login account id, which is what identifies you here.
• Your username (GitHub) or profile name (Google).
• The name on your login provider’s profile, refreshed each time you sign in.
• Your settings - your display name and whether you would like your avatar to be displayed when others view your charts.
• The URL of the avatar image from your login provider.
• Charts you create, their settings and contents.
• Likes — your likes are recorded, so that you can un-like a chart again later.
• Reports — if signed in, content reported using the Report button will be associated with your login.

Your email address is not requested during authentication, and not stored. If you sign in using both GitHub and Google using the same email address, the website will treat these as two discrete accounts.

Cookies

There are no analytics cookies, no advertising, and no third-party trackers.

There are two functional cookies used by this site:

• iceberg_session — set when you sign in. It holds a signed token identifying your account, expires after seven days, and is HTTP Only, so scripts on the page cannot read it. Signing out clears it.
• iceberg_oauth_state — set for ten minutes while a sign-in is in progress, to verify that the request coming back from the provider is the one that left. Cleared as soon as sign-in completes.

What is shared

Nothing is sold, and nothing is passed to an analytics or advertising provider.

Your chosen Display Name and the content of all public charts may be made available to all website visitors, including search engines. Unlisted charts will be made visible to anyone who has access to your shareable link, and Private charts will be visible only to you.

The site talks to whichever provider you choose during sign-in, which necessarily tells that provider you signed in here.

Any avatar images are served from the provider’s own image host, so your browser requests them directly from GitHub or Google when a page shows one, whether you are signed in or not.

Hosting

The primary website is hosted in Germany. To ensure continuity of service, the website or its backups may be hosted in other locations, including the EU, Australia, US or Canada.

Data export and correction

You may export a copy of all data that we hold about your account from your settings page.

Except for a Display Name that can be adjusted on the settings page, your account details are retrieved from the authentication provider (GitHub or Google) and any corrections should be made directly with that provider.

For any other corrections or data concerns, please contact bergmaker-support@googlegroups.com.

Data retention

Charts you create stay until they are deleted. A chart can be deleted from the My Charts page. Deleting a chart will permanently remove its content and its likes.

All other account information is held by the website until your account is deleted.

Your account can be deleted from your settings page while logged in — this will permanently remove all information relating to your account. If you have reported any content, the association between your report and your account will be removed.

Your data — including data that you have deleted — may also be preserved in the following cases:

• For up to 60 days as part of infrastructure backup or snapshot policies, to facilitate troubleshooting or recovery in the event of an issue or website failure.
• To support legal requirements or requests that require data to be preserved.

See also the terms of service.