Compare Map Projections

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This document explains the usage of cookies on Please also refer to our Privacy Policy.

The website uses cookies.
The accompanying blog and the Anderson List at do not use any cookies.

How do we use cookies? uses session cookies and persistent cookies (see below for an detailed explanation of these terms).
Only first-party cookies are used, no third-party cookies are used on this site.

Below, we list the cookies which might be set by, giving their names and their purpose of application.

Persistent cookie. At some point, you will have seen the message »This website uses cookies to improve your experience.« when you entered Once you have clicked the button »Dismiss Cookies« to dismiss the message, that decision is stored in the cookie.
This cookie is essential and technically necessary, therefore you can’t deny it.
Session cookie. This cookie stores your session ID. This ID is required to recognise several related requests from a specific user and assign them to a session. On it is, for example, used
– so that you stay in expert mode on our compare projections page, and in “flat oceans” and “south up” mode, once you’ve activated one of the modes,
– to remember your settings of the filters in the thumbnail list and/or the Single View page.
This cookie is rejected if you select »Dismiss Cookies«. Please note that if you do not allow this cookie, some parts of the website may not work properly. uses no cookies used for tracking, analytics or marketing!

What are cookies?

Cookies are small pieces of data which your web browser stores on your computer or mobile device at the request of certain web sites. They enable the website to remember your actions and preferences (such as login, language, font size and other display preferences) over a period of time, so you don’t have to keep re-entering them whenever you come back to the site or browse from one page to another.

Different types of cookies

A cookie can be classified by its lifespan and the domain to which it belongs. By lifespan, a cookie is either a:

As for the domain to which it belongs, there are either:

Legacy Cookies previously used some additional cookies.
Currently, these cookies are neither set nor read, however they might still be stored in the web browser you use in case you visited our website before that date.

If detects these cookies on your system, it will try to delete them. Nonetheless they are listed below, for reasons of completeness and in case the deletion failed.

This cookie saved your decision to allow or dismiss cookies. It has been replaced by the above mentioned mp_cookieconsent_status.
mp_user / mp_email
If you entered a comment on, there was the option to save the name and email address you provided to a cookie, in order to prepopulate the input form with this data on your next visit. This option has been removed completely. After all, most browsers offer the option to save input data anyway.
(Note: This refers only to itself. On, this option never existed.)
In case you activated the expert mode on our compare projections page, this cookie used to remember your choice. It has been replaced by saving this bit of information in a session variable as explained above.
This cookie saved the setting of the filters in the thumbnail list and/or the Single View page. This, too, has been replaced by using the session variable.

Deactivate Cookies

You can prevent the setting of cookies by adjusting the settings on your browser (see your browser Help for how to do this). Be aware that disabling cookies will affect the functionality of this and many other websites that you visit. Disabling cookies will usually result in also disabling certain functionality and features of the this site. Therefore it is recommended that you do not disable cookies.
However, even with cookies disabled, you will be able to retrieve all kinds of information that is offered by

Any more questions?

If you’ve got any more questions regarding the use of cookies on, feel free to contact us!