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Data security

For questions concerning data security please contact Sven Gumbrecht,

Privacy Policy

The operators of this site take the protection of your personal data very seriously. We treat your personal data confidentially and in accordance with legal date protection regulations, as well as this date protection statement. 
The responsible authority concerning data protection laws is wechange e.G. Further details concerning the provider can be found under impressum:
In these points, we are informing you of what data is being collected during your visit to the website and how it will be used. The legal basis for data protection is found in the Bundesdatenschutzgesetz (BDSG) and in the Telemediengesetz (TMG). 
The use of our website is, as a rule, possible without giving any personal data. Insofar as personal data is collected on our website (for instance name, address or e-mail address), this happens, as far as possible, on a purely voluntary basis. This data will not be passed on to a third party without explicit consent. 
We would like to point out that the transfer on data in Internet (for instance, communication via e-mail) can present security gaps. A flawless protection of data from the access of a third party is not possible. 


Internet sites sometimes use so-called cookies. Cookies cause no damage to your computer and contain no viruses. Cookies are there to make our service more user-friendly, more effective and safer. Cookies are small text files that are deposited on your computer and saved by your browser.

Most of the cookies we use are so-called “session-cookies”. After the end of your visit, they are automatically deleted. Other cookies remain on your device until you delete them. These cookies allow us to recognise your browser at your next visit.

You can set your browser to inform you when cookies are installed and to allow cookies only in individual cases, to accept them in certain cases or generally exclude them, as well as activate the automatic deletion of cookies when you close your browser. In the case of cookies being deactivated, the functionality of this website can be restricted.


Website providers collect and save automatically information in so-called server log files, which your browser then automatically transfers to us. These are:

  • browser type/browser version
  • the system provider used
  • URL referral
  • hostname of the computer accessing the site
  • time of the server request

This data is not traceable to individual people. A merging of this data with other data sources is not carried out. We reserve the right to review this data at a later date, if concrete indications of unlawful use become apparent.

Contact Form

When you contact us via the contact form, your data from the enquiry form, including the contact information put in by you is saved by us, in order to process the enquiry and in case of further questions. We do not pass this information on without your consent.


Newsletter Data

If you would like to be included in the website’s newsletter, then we need your e-mail address as well as information, which allow us to check that you are the e-mail account holder and you agree to receive the newsletter. Further information will not be collected. We use the data exclusively for sending the requested information and do not pass it on to third parties.

You can revoke your consent for us to save your data, your e-mail address as well as the use of it to send the newsletter at any time, via the “Unsubscribe” link in the newsletter.

Data Policy for the Use of Piwik

This website uses the open-source web analysis service, Piwik. Piwik uses so-called “cookies”. These are text files, which are saved on your computer and allow an analysis of your usage of the website. With that, the information collected by the cookie regarding the use of this website is saved on our server. The IP address is anonymised before saving the data.

The information collected by the cookie regarding the use of this website is not passed on to a third party. You can stop the saving of cookies with the corresponding settings in your browser software; we point out however, that in this case, you will not be able to use all the functions of the website to their full extent.
If you do not agree to the storage and use of your data, you can deactivate storage and use here. In this case, an opt-out cookie will be deposited that stops Piwik from saving your usage data. If you delete your cookies, as a consequence, the Piwik opt-out cookie will also be deleted. The opt-out cookie has to be activated again when visiting our site on the next occasion.

Data Policy for the Use of Facebook Plugins (Like Button)

On our site, you have to option to activate plugins from the social network Facebook, Provider Facebook Inc., 1 Hacker Way, Menlo Park, California 94025, USA, in groups and projects. You can recognise the Facebook plugins through the Facebook logo or the “Like” button on our site. An overview of Facebook plugins can be found here:

If you activate the link to Facebook in your profile (or project/group), a direct connection between your browser and the Facebook server is produced. Through that, Facebook receives the information that you with your IP address have visited or website. If you click the Facebook “Like” button, whilst you are logged in in your Facebook account, you can link the content of our site to your Facebook profile. In this way, Facebook can attribute the visit to our site to your user account. We would like to point out that we, as provider of the site, receive no knowledge of the content of the data transferred, nor of its use from Facebook. Further information can be found in Facebook’s data policy at

If you don’t wish for Facebook to be able to attribute your visit to our site to you Facebook user account, then please log out of Facebook.

Use of CartoDB and for Digital Publishing

 For our map, we use the open source JavaScript Library “Leaflet” (interactive map) and “CartoDB” (Geoinformation system and mapping software). “OpenStreetMap” is used a map material, which is loaded in the background by the cloud platform “”. By loading the cloud platform, the IP address of your computer is passed on to the cloud platform “”. This is required for the content to be made available.

Disclosure, Deletion, Blocking

You have at all times the right to the free-of-charge disclosure regarding your saved personal data, its origin and recipient and the purpose of the data processing, as well as the right to amend, block, or delete this data. Regarding this and other questions concerning personal data, you can contact us at any time at the address given in the impressum.

Rejection of Junk Mail

The use of the contact details published in the impressum for unsolicited advertising and information materials is herewith countered. The website provider reserves the right to undertake legal proceedings in case of the unsolicited sending of advertising information, for instance, through spam e-mails.

Changes to the Data Policy

We reserve the right to revise the data policy when necessary.

In case of any conflict of interpretation or discrepancies between the translated version of the Privacy Policy and the original, German version, the German version prevails.

Berlin, July 2017