File:Kölner Dom -Tr.Pt. 1867 Baeyer.jpg
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Summary
[edit]DescriptionKölner Dom -Tr.Pt. 1867 Baeyer.jpg |
Deutsch: Die "Laterne" des 1744 erbauten hölzernen Dachreiters (Chorturm) des Kölner Doms war ab 1803 von Jean Joseph Tranchot als Beobachtungsstation/Zielpunkt für eine Triangulation der vier linksrheinischen Departements genutzt worden. 1811 wurde der Dachreiter wegen Baufälligkeit abgerissen. Als Ersatz wurde 1836 das gotische Kreuz auf dem Ostchor als trigonometrischer Punkt genutzt. 1860/61 wurde im Zuge der Europäischen Längengradmessung (entlang dem 52. Breitengrad von Irland bis Russland) auf dem noch unvollendeten Südturm des Doms ein Steinpfeiler aufgemauert, auf dem die Winkelbeobachtungen ausgeführt wurden. Dieser Pfeiler musste dem Weiterbau der Domtürme weichen. Als Ersatz wurde 1867 in dem 1860 erbauten Vierungsturm ein eiserner Beobachtungstisch aufgestellt und genutzt. Daran befestigt ist eine Emailletafel mit der Inschrift "Tr. Pt. der europäischen Gradmessung 1867 Baeyer". Der Tisch und die Tafel wurden beim Wiederaufbau des Vierungsturms nach dem Zweiten Weltkrieg weitgehend erneuert. Vgl. Der Kölner Dom - Vermessungspunkt der Landesaufnahme seit 1803. Eine Dokumentation des Landesvermessungsamtes Nordrhein-Westfalen, Bonn 1989
English: Historical triangulation station for the European Grade Measurement (Johann Jacob Baeyer 1867) at the crossing tower of Cologne Cathedral |
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Source | Own work | |||||||||||||||||
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creator QS:P170,Q108103612 |
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Attribution (required by the license) InfoField | © Raimond Spekking / CC BY-SA 4.0 (via Wikimedia Commons) |
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InfoField | © Raimond Spekking |
Camera location | 50° 56′ 28.67″ N, 6° 57′ 29.42″ E ![]() ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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Annotations InfoField | This image is annotated: View the annotations at Commons |
Tr. Pt.
der europäischen Gradmessung
1867
Baeyer
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:14, 29 January 2007 | ![]() | 1,533 × 2,000 (830 KB) | Raymond (talk | contribs) | {{Information |Description= {{de|Historischer de:Nullmeridian für Deutschland auf dem Vierungsturm des Kölner Doms.}} {{en|Historical prima meridian for Germany at the crossing tower of Cologne Cathedral}} |Source=own pho |
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File usage on Commons
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- Kölner Dom
- File:Kölner Dom - Nullmeridian.jpg (file redirect)
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Metadata
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Image title | OLYMPUS DIGITAL CAMERA |
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Camera manufacturer | OLYMPUS OPTICAL CO.,LTD |
Camera model | E-20,E-20N,E-20P |
Exposure time | 1/100 sec (0.01) |
F-number | f/2.8 |
ISO speed rating | 80 |
Date and time of data generation | 14:55, 27 January 2007 |
Lens focal length | 19 mm |
Orientation | Normal |
Horizontal resolution | 144 dpi |
Vertical resolution | 144 dpi |
Software used | 29-1102 |
File change date and time | 14:55, 27 January 2007 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.1 |
Date and time of digitizing | 14:55, 27 January 2007 |
Meaning of each component |
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APEX exposure bias | 0 |
Maximum land aperture | 2.06 APEX (f/2.04) |
Metering mode | Center weighted average |
Flash | Flash did not fire |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |