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The Swiss coordinate system (or Swiss grid) is a geographic coordinate system used in Switzerland and Liechtenstein for maps and surveying by the Swiss Federal Office of Topography . A first coordinate system was introduced in 1903 under the name LV03 ( Landesvermessung 1903 , German for “land survey 1903”), based on the Mercator projection ...
The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2024b of the tz database. [2]
The geographical centre of Switzerland has the coordinates Swiss Grid: 660158/183641 It is located at Älggi-Alp in the municipality of Sachseln , Obwalden . The point is the centre of mass determined in 1988 by Swisstopo .
This is a list representing time zones by country. Countries are ranked by total number of time zones on their territory. Time zones of a country include that of dependent territories (except Antarctic claims). France, including its overseas territories, has the most time zones with 12 (13 including its claim in Antarctica and all other counties ).
The electrical telegraph was introduced in Switzerland in 1851, which allowed near real-time communication, especially amongst post offices.By July 1853, all telegraph and post offices across Switzerland were using Bernese time, [2] a local mean time measured from the Zytglogge clocktower [3] at UTC+00:29:45.5.
View of Erlach from across Lake Biel. Both the castle and Jolimont mountain are visible toward the right side. Erlach has an area of 3.49 km 2 (1.35 sq mi). [5] Of this area, 1.54 km 2 (0.59 sq mi) or 43.9% is used for agricultural purposes, while 0.97 km 2 (0.37 sq mi) or 27.6% is forested.
In 1899, the Zurich merchant Abraham Weill Einstein initiated the oldest observatory in Switzerland, situated near Werdmühleplatz (Uraniastrasse). On June 15, 1907, the observatory was given to operational use. Its 51 metres (167 ft) tower dominates the western end of Zurich's historic Altstadt. [1]
The Geneva Observatory (French: Observatoire de Genève, German: Observatorium von Genf) is an astronomical observatory at Sauverny (CH) in the municipality of Versoix, Canton of Geneva, in Switzerland. It shares its buildings with the astronomy department of the École Polytechnique Fédérale de Lausanne.