Hans Heinrich Denzler

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Hans Heinrich Denzler

Hans Heinrich Denzler (born February 27, 1814 in Nänikon ; † January 25, 1876 in Bern ) was a Zurich engineer , physicist , meteorologist , geodist , topographer and cartographer .

Life

Denzler was the son of the Eglisau land clerk Hans Jakob Denzler . He attended schools in Greifensee and Eglisau . As a youth he surveyed the area with his father's instruments. He received his training from Karl Heinrich Gräffe at the Technical Institute in Zurich, the forerunner of the industrial school. In 1832 he was elected to teach mathematics and physics at an institute in Horgen . 1835-1837 he was tutor in Nyon and 1837-1841 secondary teacher in Uster .

From 1843 he worked under Johannes Eschmann (1808-1852) and Johannes Wild on the surveying of the Canton of Zurich . In 1847 he took part in the Sonderbund War as a sapper lieutenant .

In 1854 he was elected chief engineer and in 1862 head of the Bernese topographical office for the topographical survey of the canton of Bern . 1866–1873 he was cadastral director of the canton of Solothurn .

He was a member of the Swiss Geodetic Commission of the Swiss Natural Research Society founded in 1861 , on whose behalf he took over the management of a new Swiss triangular network over the Alps .

plant

First order triangulation point from 1860 on the bowl

Denzler was particularly interested in astronomical and geodetic measurements and he made numerous discoveries in mathematics. After completing secondary school, he resumed scientific work, which included observations on the terrestrial refraction of light.

The measurements in the cantons of Zurich and Bern were among Denzler's most important works. They served the Federal Topographical Bureau under the direction of Guillaume-Henri Dufour as the basis for the topographic map of Switzerland (Dufourkarte) published from 1845 to 1864 .

From 1843 he was Eschmann's employee responsible for the signals at Zurich mapping . He helped triangulate the southern part of the canton and, after Eschmann's death in 1852, carried out that of the northern part of the canton with Rudolf Wolf . From 1846–1851 he topographed around 15 percent of the canton's area and from 1851–1854 he was busy with depth measurements in Lake Zurich and area calculations. On behalf of Dufour, he carried out triangulations in the Upper Engadin , Poschiavo and Münstertal . Among other things, he published in the communications of the Zurich Natural Research Society on meteorological observations as well as mathematical, geophysical and seismic studies.

Due to his publications, his many years of activity as a geodesist and topographer and the good reference of the director of the federal map , Dufour, he was elected by the canton of Bern as chief engineer for the topographical recording of the canton of Bern .

The Swiss Geodetic Commission should develop the Swiss contribution to the European grade measurement . She commissioned Denzler to revise and partially re-measure the network of triangulation primordiale , which served as the basis for the Dufour map.

Fonts

  • About the altitude and the climate of the Upper Engadine , presented on January 6, 1851. Communications from the Natural Research Society in Zurich, 1850–1852
  • Via the railway from Zurich to Winterthur , 1852.
  • The lower snow line during the year, from Lake Constance to the Säntisspitze . New memoranda of the General Swiss Society for the Whole Natural Sciences, 1855
  • Lower snow line during the year . New Memoranda, Volume 14, 1855
  • The topographical recordings of the canton of Bern: Report of the mapping commission to the titular government council , Buchdruckerei KJ Wyss, Bern 1864.
  • The altitude of the Chasseral as the basis of the Swiss mountain network . Bern, 1864.
  • The deflection of the plumb bob through the mountains . Swiss Alpine Club , yearbook 1866.
  • About the climatic conditions on high mountain peaks . SAC yearbook 1866.
  • Lake depth measurements in Switzerland , around 1875

literature

  • Rudolf Wolf: In memory of Hans Heinrich Denzler . Swiss Society for Natural Research, Basel 1877
  • Theo Locher: Bernese mapping at the time of the Dufour map and preliminary work on the Bernese land registry . Dissertation University of Bern 1954.

Web links

Individual evidence

  1. ↑ Zurich Central Library: Bridgehead and artillery position Fahr Ottenbach ZH, Sonderbund War, by Sappeur-Lieutenant Hans-Heinrich Denzler, engineer, cartographer (1814–1876), November 19, 1847
  2. ^ ETH Library: Biography of Hans Heinrich Dennler
  3. ^ ETH library: The Bernese mapping under the direction of Hans Heinrich Denzler
  4. ↑ 150 years of the Swiss Geodetic Commission ( memento of the original from January 9, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.  @1@ 2Template: Webachiv / IABot / www.geomatik.ch
  5. ↑ Swiss Geodetic Commission, European degree measurement: The Swiss triangle network. Zurich 1881
  6. ↑ Internet Archive - Hans Heinrich Denzler: About the railway from Zurich to Winterthur
  7. ↑ DigiBern: The topographic survey of the Canton of Bern in 1864
  8. ^ SAC yearbook 1866, page 497
  9. ^ SAC yearbook 1866, page 539
  10. ^ University of Bern: Theo Locher - Bernische Kartierung
personal data
SURNAME Denzler, Hans Heinrich
BRIEF DESCRIPTION Swiss cartographer
DATE OF BIRTH February 27, 1814
PLACE OF BIRTH Nanikon
DATE OF DEATH January 25, 1876
Place of death Bern