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August Heinrich Petermann
Augustus Heinrich Petermann (18 April 182225 September 1878) was a German cartographer. Early years Petermann was born in Bleicherode, Germany. When he was 14 years old he started grammar school in the nearby town of Nordhausen. His mother wanted him to become a clergyman, but his excellence in the drawing of maps and his love for geographic readings made his choice of another career inevitable. Heinrich Berghaus, with support of Alexander von Humboldt, had started the 'Geographische Kunstschule' (Geographical School of Art) in 1839 in Potsdam, close to Berlin, following the example of the school for engravers at the Archives Militaires Generales in Paris (founded in 1811). During its existence Berghaus's academy offered only three courses, and only a few students attended: * 1839–1844: August Petermann, Heinrich 'Henry' Lange (1821–1893), and Otto Göcke, who died one year later of tuberculosis * 1844–1847: Amandus Sturmhöfel (1823–?) and Theodor Schilling * 1845� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bleicherode
Bleicherode () is a town in the district of Nordhausen, in Thuringia, Germany. It is situated on the river Wipper, 17 km southwest of Nordhausen. On 1 December 2007, the former municipality Obergebra was incorporated by Bleicherode. The former municipalities Etzelsrode, Friedrichsthal, Kleinbodungen, Kraja, Hainrode, Nohra, Wipperdorf and Wolkramshausen were merged into Bleicherode in January 2019. Every Thursday, there is a market held in the town. Historically, Bleicherode belonged to the Prussian province of Saxony between 1700 and 1945. One of Bleicherode's most famous natives is the cartographer August Heinrich Petermann. File:August Petermann Geburtshaus Bleicherode.jpg, The house where Petermann was born: Neue Straße 3, Bleicherode File:Südharzreise 26 – August Petermann in Bleicherode.jpg, Memorial for August Petermann in Bleicherode Notable persons * August Heinrich Petermann (1822–1878), German cartographer * Adalbert Merx (1838–1909), German ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grampians
The Grampian Mountains (''Am Monadh'' in Gaelic) is one of the three major mountain ranges in Scotland, that together occupy about half of Scotland. The other two ranges are the Northwest Highlands and the Southern Uplands. The Grampian range extends southwest to northeast between the Highland Boundary Fault and the Great Glen. The range includes many of the highest mountains in the British Isles, including Ben Nevis (whose peak contains the highest point in the British Isles at above sea level) and Ben Macdui (whose peak contains second-highest at ). A number of rivers and streams rise in the Grampians, including the Tay, Spey, Cowie Water, Burn of Muchalls, Burn of Pheppie, Burn of Elsick, Cairnie Burn, Don, Dee and Esk. The area is generally sparsely populated. There is some ambiguity about the extent of the range, and until the nineteenth century, they were generally considered to be more than one range, which all formed part of the wider Scottish Highlands. This v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Keith Johnston (1804–1871)
Alexander Keith Johnston FRSE FRGS FGS FEGS LLD (died 9 July 1871) was a Scottish geographer and cartographer. Biography He was born at Kirkhill near Penicuik, south of Edinburgh. He was the son of Andrew Johnston and Isabel Keith. His brother was Thomas Brumby Johnston FRSE. After an education at the High School and the University of Edinburgh he was apprenticed to the Edinburgh engraver and mapmaker, James Kirkwood and William Home Lizars. In 1826, he joined his brother William (who would become Sir William Johnston, Lord Provost of Edinburgh) in a printing and engraving business, forming the well-known cartographical firm of W. and A. K. Johnston with offices based at 4 St Andrew Square in Edinburgh's New Town (demolished 2016) and their printworks based at Edina Works, off Easter Road. The firm used the clan motto of "Ready Aye Ready" as their logo. Early hikes in the West Highlands had led Johnston to despair at the accuracy of maps, and inspired a desire to rectify t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Christian Poggendorff
Johann Christian Poggendorff (29 December 1796 – 24 January 1877), was a German physicist born in Hamburg. By far the greater and more important part of his work related to electricity and magnetism. Poggendorff is known for his electrostatic motor which is analogous to Wilhelm Holtz's electrostatic machine. In 1841 he described the use of the potentiometer for measurement of electrical potentials without current draw. Biography Poggendorf had apprenticed himself to an apothecary in Hamburg, and when twenty-two began to earn his living as an apothecary's assistant at Itzehoe. Ambition and a strong inclination towards a scientific career led him to throw up his business and move to Berlin, where he entered Humboldt University in 1820. Here his abilities were speedily recognized, and in 1823 he was appointed meteorological observer to the Academy of Sciences. Even at this early period he had conceived the idea of founding a physical and chemical scientific journal, and the rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Ritter
Carl Ritter (August 7, 1779September 28, 1859) was a German geographer. Along with Alexander von Humboldt, he is considered one of the founders of modern geography. From 1825 until his death, he occupied the first chair in geography at the University of Berlin. Biography Carl Ritter was born in Quedlinburg, one of the six children of a well-respected doctor, F. W. Ritter. Ritter's father died when he was two. At the age of five, he was enrolled in the Schnepfenthal Salzmann School, a school focused on the study of nature (apparently influenced by Jean-Jacques Rousseau's writings on children's education). This experience would influence Ritter throughout his life, as he retained an interest in new educational modes, including those of Johann Heinrich Pestalozzi. Indeed, much of Ritter's writing was based on Pestalozzi's three stages in teaching: the acquisition of the material, the general comparison of material, and the establishment of a general system. After completion of hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scale (map)
The scale of a map is the ratio of a distance on the map to the corresponding distance on the ground. This simple concept is complicated by the curvature of the Earth's surface, which forces scale to vary across a map. Because of this variation, the concept of scale becomes meaningful in two distinct ways. The first way is the ratio of the size of the generating globe to the size of the Earth. The generating globe is a conceptual model to which the Earth is shrunk and from which the map is projected. The ratio of the Earth's size to the generating globe's size is called the nominal scale (= principal scale = representative fraction). Many maps state the nominal scale and may even display a bar scale (sometimes merely called a 'scale') to represent it. The second distinct concept of scale applies to the variation in scale across a map. It is the ratio of the mapped point's scale to the nominal scale. In this case 'scale' means the scale factor (= point scale = particular scale) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isolines
A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. It is a plane section of the three-dimensional graph of the function f(x,y) parallel to the (x,y)-plane. More generally, a contour line for a function of two variables is a curve connecting points where the function has the same particular value. In cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes. The contour interval of a contour map is the difference in elevation between successive contour lines. The gradient of the function is always perpendicular to the contour lines. When the lines are close together the magnitude of the gradi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Justus Perthes (publishing Company)
''Justus Perthes Publishers'' (german: Justus Perthes Verlag) was established in 1785 in Gotha, Germany. Justus Perthes was primarily a publisher of geographic atlases and wall maps. He published ''Petermanns Geographische Mitteilungen'' and also the Almanach de Gotha (''Gothaischer Hofkalender''). In 2016 the publisher was discontinued. Almanacs From 1778 Johann Georg Justus Perthes worked as a bookseller in Gotha, where he founded the publishing firm 'Justus Perthes' in September 1785, when he got a fifteen-year lease for the Almanach de Gotha. This almanac was published since 1763 by Carl Wilhelm Ettinger, Gotha, and was the French version of the ''Almanach de Gotha''. Only after the second 15-year lease contract in 1816 he was allowed to publish the almanac with the imprint of his own publishing house. The publication of the almanac as a Justus Perthes publication ceased in 1944. In later years another set of almanacs was published in the German language: ''Gothaisches genea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polygon
In geometry, a polygon () is a plane figure that is described by a finite number of straight line segments connected to form a closed ''polygonal chain'' (or ''polygonal circuit''). The bounded plane region, the bounding circuit, or the two together, may be called a polygon. The segments of a polygonal circuit are called its '' edges'' or ''sides''. The points where two edges meet are the polygon's '' vertices'' (singular: vertex) or ''corners''. The interior of a solid polygon is sometimes called its ''body''. An ''n''-gon is a polygon with ''n'' sides; for example, a triangle is a 3-gon. A simple polygon is one which does not intersect itself. Mathematicians are often concerned only with the bounding polygonal chains of simple polygons and they often define a polygon accordingly. A polygonal boundary may be allowed to cross over itself, creating star polygons and other self-intersecting polygons. A polygon is a 2-dimensional example of the more general polytope in any num ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper Engraving
Engraving is the practice of incising a design onto a hard, usually flat surface by cutting grooves into it with a burin. The result may be a decorated object in itself, as when silver, gold, steel, or glass are engraved, or may provide an intaglio printing plate, of copper or another metal, for printing images on paper as prints or illustrations; these images are also called "engravings". Engraving is one of the oldest and most important techniques in printmaking. Wood engraving is a form of relief printing and is not covered in this article, same with rock engravings like petroglyphs. Engraving was a historically important method of producing images on paper in artistic printmaking, in mapmaking, and also for commercial reproductions and illustrations for books and magazines. It has long been replaced by various photographic processes in its commercial applications and, partly because of the difficulty of learning the technique, is much less common in printmaking, where it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithography
Lithography () is a planographic method of printing originally based on the immiscibility of oil and water. The printing is from a stone (lithographic limestone) or a metal plate with a smooth surface. It was invented in 1796 by the German author and actor Alois Senefelder and was initially used mostly for musical scores and maps.Meggs, Philip B. A History of Graphic Design. (1998) John Wiley & Sons, Inc. p 146 Carter, Rob, Ben Day, Philip Meggs. Typographic Design: Form and Communication, Third Edition. (2002) John Wiley & Sons, Inc. p 11 Lithography can be used to print text or images onto paper or other suitable material. A lithograph is something printed by lithography, but this term is only used for fine art prints and some other, mostly older, types of printed matter, not for those made by modern commercial lithography. Originally, the image to be printed was drawn with a greasy substance, such as oil, fat, or wax onto the surface of a smooth and flat limestone pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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