The birth of topology and graph theory: Euler's 7 Bridges of Königsberg/Kaliningrad, Russia

Sentinel-1 CSAR IW acquired on 14 October 2021 at 04:51:20 UTC
Sentinel-1 CSAR IW acquired on 26 October 2021 at 04:51:20 UTC
Sentinel-1 CSAR IW acquired on 07 November 2021 at 04:51:20 UTC
Sentinel-2 MSI acquired on 13 March 2022 at 09:50:31 UTC
Author(s): Sentinel Vision team, VisioTerra, France - svp@visioterra.fr
Keyword(s): Urban, infrastructure, Russia, Germany
Fig. 1 - S1 (14.10.2021-07.11.2021) - In 1735, German scientist Leonhard Euler made some of the first work dedicated to topology & graph theory.
3D view
He proved that it was not possible to plan a route that would cross each of the seven bridges of Königsberg exactly once.
Fig. 2 - S2 (09.09.2021) - All seven bridges were destroyed by an Allied bombing raid in 1944.
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Only five were rebuilt in the city renamed Kaliningrad after its conquest by USSR. This new configuration and the new bridges built since provide multiple solutions to this renewed version of Euler's problem.
The views expressed herein can in no way be taken to reflect the official opinion of the European Space Agency or the European Union.
Contains modified Copernicus Sentinel data 2024, processed by VisioTerra.
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