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Contact

Email: mail@christian-unger.dev

Enquiries are answered promptly. No telephone number is given; under section 5 DDG a means of contact allowing swift electronic communication is sufficient.

Responsible for content

Christian Unger, address as above.

Professional note

This site is operated as a private portfolio and job application site. It is unconnected to my employer; the professional work shown is deliberately abstracted so that no internal business information is identifiable.

Nature of the service

This is a personal portfolio and application site. No goods or services are offered, no contracts are concluded, and there is no VAT identification number.

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I am neither obliged nor willing to take part in dispute resolution proceedings before a consumer arbitration board.

Liability for content

The content of this site has been compiled with care. As a service provider I am responsible for my own content under the general laws pursuant to section 7 (1) DDG. Under sections 8 to 10 DDG, however, I am not obliged to monitor transmitted or stored third-party information or to investigate circumstances indicating unlawful activity.

Liability for links

This site contains links to external websites over whose content I have no influence. I can accept no liability for that third-party content; responsibility always rests with the respective provider. No legal infringements were apparent at the time of linking. Should any become known, the links concerned will be removed without delay.

Copyright

The texts, illustrations and analyses I have created are subject to German copyright law. Reproduction, adaptation and distribution beyond the limits of copyright require my written consent.

Separate licence terms apply to the geodata, map works, fonts and software libraries embedded in this site. They are stated with each presentation:

• Map rendering: MapLibre GL JS and PMTiles, BSD-3-Clause licence
• Noto Sans typeface: SIL Open Font License 1.1
• Present-day map imagery: © OpenStreetMap contributors, Open Database License (ODbL)
• Place data: GeoNames, Creative Commons Attribution 4.0
• Country, water and boundary data: Natural Earth, public domain
• Terrain model: Copernicus EU-DEM v1.1
• Historical map works of the fortress of Mainz: Riksarkivet Sweden, Stockholm
• The vector data model of the fortress of Mainz is published under Creative Commons Attribution 4.0

Literature cited

The locations of the telegraph stations are individually referenced and come from three works:

• Menning, Manfred / Hendrich, Andreas: Preußens Telegraphenlinie Berlin–Koblenz und Beiträge zur Geschichte und Geologie des Potsdamer Telegraphenbergs und seiner Umgebung. Telegraphenbuch III, Potsdam 2012. — 43 stations
• Herbarth, Dieter: Die Entwicklung der optischen Telegrafie in Preußen. Arbeitshefte des Landeskonservators Rheinland 15, Cologne 1978. — 16 stations
• Fuchs, Peter: „Holztelegrafie". Die optische Telegrafenlinie des Königreiches Preußen und ihre Spuren in Berlin und Sachsen-Anhalt. In: Heimatverein für den Bezirk Zehlendorf e. V. (ed.): Jahrbuch 2006 für Zehlendorf, Berlin 2006. — 3 stations