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36-852: Coordinates : 48°08′52″N 11°34′51″E / 48.14766°N 11.58076°E / 48.14766; 11.58076 German digital library Munich Digitization Center [REDACTED] 48°08′52″N 11°34′51″E / 48.14766°N 11.58076°E / 48.14766; 11.58076 Location München , Germany Type Digital library Established 1997 Collection Items collected manuscripts, early prints, modern books, maps and photographic collections, etc. Size 484,388 (March 2011) Access and use Access requirements Free online access Other information Website www.digitale-sammlungen.de Munich Digitization Center ( German : Das Münchener Digitalisierungszentrum ; MDZ )
72-505: A tan ϕ {\displaystyle \textstyle {\tan \beta ={\frac {b}{a}}\tan \phi }\,\!} ; for the GRS 80 and WGS 84 spheroids, b a = 0.99664719 {\textstyle {\tfrac {b}{a}}=0.99664719} . ( β {\displaystyle \textstyle {\beta }\,\!} is known as the reduced (or parametric) latitude ). Aside from rounding, this
108-460: A datum transformation such as a Helmert transformation , although in certain situations a simple translation may be sufficient. Datums may be global, meaning that they represent the whole Earth, or they may be local, meaning that they represent an ellipsoid best-fit to only a portion of the Earth. Examples of global datums include World Geodetic System (WGS 84, also known as EPSG:4326 ),
144-545: A 19th-century English silk weaver, starting around 1862, are called Stevengraphs . Woven silk bookmarks were very appreciated gifts in the Victorian Era and Stevens seemed to make one for every occasion and celebration. One Stevengraph read: All of the gifts which heaven bestows, there is one above all measure, and that's a friend midst all our woes, a friend is a found treasure to thee I give that sacred name, for thou art such to me, and ever proudly will I claim to be
180-468: A coordinate tuple like a cartesian coordinate system , the geographic coordinate system is not cartesian because the measurements are angles and are not on a planar surface. A full GCS specification, such as those listed in the EPSG and ISO 19111 standards, also includes a choice of geodetic datum (including an Earth ellipsoid ), as different datums will yield different latitude and longitude values for
216-529: A friend to thee. Most 19th-century bookmarks were intended for use in Bibles and prayer books and were made of ribbon, woven silk, or leather. By the 1880s the production of woven silk markers was declining and printed markers made of stiff paper or cardboard began to appear in significant numbers. This development paralleled the wider availability of books themselves, and the range of available bookmarkers soon expanded dramatically. Bookmarks that do not damage
252-608: A point on Earth's surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses (often called great circles ), which converge at the North and South Poles. The meridian of the British Royal Observatory in Greenwich , in southeast London, England, is the international prime meridian , although some organizations—such as
288-473: A region of the surface of the Earth. Some newer datums are bound to the center of mass of the Earth. This combination of mathematical model and physical binding mean that anyone using the same datum will obtain the same location measurement for the same physical location. However, two different datums will usually yield different location measurements for the same physical location, which may appear to differ by as much as several hundred meters; this not because
324-411: Is 6,367,449 m . Since the Earth is an oblate spheroid , not spherical, that result can be off by several tenths of a percent; a better approximation of a longitudinal degree at latitude ϕ {\displaystyle \phi } is where Earth's equatorial radius a {\displaystyle a} equals 6,378,137 m and tan β = b
360-480: Is 110.6 km. The circles of longitude, meridians, meet at the geographical poles, with the west–east width of a second naturally decreasing as latitude increases. On the Equator at sea level, one longitudinal second measures 30.92 m, a longitudinal minute is 1855 m and a longitudinal degree is 111.3 km. At 30° a longitudinal second is 26.76 m, at Greenwich (51°28′38″N) 19.22 m, and at 60° it
396-522: Is 15.42 m. On the WGS 84 spheroid, the length in meters of a degree of latitude at latitude ϕ (that is, the number of meters you would have to travel along a north–south line to move 1 degree in latitude, when at latitude ϕ ), is about The returned measure of meters per degree latitude varies continuously with latitude. Similarly, the length in meters of a degree of longitude can be calculated as (Those coefficients can be improved, but as they stand
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#1732765779854432-412: Is a thin marking tool, commonly made of card , leather , or fabric , used to keep track of a reader's progress in a book and allow the reader to easily return to where the previous reading session ended. Alternate materials for bookmarks are paper , metals like silver and brass, silk , wood , cord (sewing) , and plastic . Some books may have one or more bookmarks made of woven ribbon sewn into
468-3371: Is an institution dedicated to digitization , Online publication and the long-term archival preservation of the holdings of the Bavarian State Library and other cultural heritage institutions. It was founded in 1997 under the leadership of Mark Brantl. It operates as a unit of the Bavarian State Library. See also [ edit ] Books in Germany External links [ edit ] Official website v t e Books Production Binding Covers dust jackets Design Editing Illustration Illuminated manuscripts Printing edition history incunabula instant book limited edition Publishing advance copy hardcover paperback Size Typesetting Volume (bibliography) Collection (publishing) Book series Consumption Awards Bestsellers list Bibliography Bibliomania ( tsundoku ) Bibliophilia Bibliotherapy Bookmarks Bookselling blurbs book towns history used Censorship Clubs Collecting Digitizing Bookworm (insect) Furniture bookcases bookends Library Print culture Reading literacy Reviews By country Brazil France Germany Italy Japan Netherlands Pakistan Spain United Kingdom United States Other Genres fictional miniature pop-up textbook Grimoire Formats audiobooks Ebooks Folio Coffee table book Related Banned books Book burning incidents Nazi Book curses Book packaging Book swapping Book tour Conservation and restoration Dog ears History of books scroll codex Intellectual property ISBN Novel Outline Preservation The Philobiblon World Book Day World Book Capital [REDACTED] Outline [REDACTED] Category [REDACTED] Portal Authority control databases [REDACTED] International VIAF National Germany Czech Republic Retrieved from " https://en.wikipedia.org/w/index.php?title=Munich_Digitization_Center&oldid=1253769122 " Categories : German digital libraries Libraries in Munich Early modern printing databases Libraries established in 1997 Hidden categories: Pages using gadget WikiMiniAtlas Articles with short description Short description matches Wikidata Infobox mapframe without OSM relation ID on Wikidata Coordinates on Wikidata Articles containing German-language text Official website different in Wikidata and Misplaced Pages Pages using
504-456: Is known as a graticule . The origin/zero point of this system is located in the Gulf of Guinea about 625 km (390 mi) south of Tema , Ghana , a location often facetiously called Null Island . In order to use the theoretical definitions of latitude, longitude, and height to precisely measure actual locations on the physical earth, a geodetic datum must be used. A horizonal datum
540-619: Is the exact distance along a parallel of latitude; getting the distance along the shortest route will be more work, but those two distances are always within 0.6 m of each other if the two points are one degree of longitude apart. Like any series of multiple-digit numbers, latitude-longitude pairs can be challenging to communicate and remember. Therefore, alternative schemes have been developed for encoding GCS coordinates into alphanumeric strings or words: These are not distinct coordinate systems, only alternative methods for expressing latitude and longitude measurements. Bookmark A bookmark
576-465: Is used to precisely measure latitude and longitude, while a vertical datum is used to measure elevation or altitude. Both types of datum bind a mathematical model of the shape of the earth (usually a reference ellipsoid for a horizontal datum, and a more precise geoid for a vertical datum) to the earth. Traditionally, this binding was created by a network of control points , surveyed locations at which monuments are installed, and were only accurate for
612-481: The International Date Line , which diverges from it in several places for political and convenience reasons, including between far eastern Russia and the far western Aleutian Islands . The combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The visual grid on a map formed by lines of latitude and longitude
648-480: The 1850s. One of the first references to these is found in Mary Russell Mitford's Recollections of a Literary Life (1852): "I had no marker and the richly bound volume closed as if instinctively." Note the abbreviation of 'bookmarker' to 'marker'. The modern abbreviation is usually 'bookmark'. Historical bookmarks can be very valuable, and are sometimes collected along with other paper ephemera . By
684-478: The 1860s, attractive machine-woven markers were being manufactured, mainly in Coventry , England , the centre of the silk-ribbon industry. One of the earliest was produced by J.&J. Cash to mark the death of Albert, Prince Consort , in 1861. Thomas Stevens of Coventry soon became pre-eminent in the field and claimed to have nine hundred different designs. Woven pictorial bookmarks produced by Thomas Steven ,
720-526: The 1st or 2nd century, Marinus of Tyre compiled an extensive gazetteer and mathematically plotted world map using coordinates measured east from a prime meridian at the westernmost known land, designated the Fortunate Isles , off the coast of western Africa around the Canary or Cape Verde Islands , and measured north or south of the island of Rhodes off Asia Minor . Ptolemy credited him with
756-506: The Earth's surface move relative to each other due to continental plate motion, subsidence, and diurnal Earth tidal movement caused by the Moon and the Sun. This daily movement can be as much as a meter. Continental movement can be up to 10 cm a year, or 10 m in a century. A weather system high-pressure area can cause a sinking of 5 mm . Scandinavia is rising by 1 cm a year as a result of
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#1732765779854792-729: The European ED50 , and the British OSGB36 . Given a location, the datum provides the latitude ϕ {\displaystyle \phi } and longitude λ {\displaystyle \lambda } . In the United Kingdom there are three common latitude, longitude, and height systems in use. WGS 84 differs at Greenwich from the one used on published maps OSGB36 by approximately 112 m. The military system ED50 , used by NATO , differs from about 120 m to 180 m. Points on
828-536: The French Institut national de l'information géographique et forestière —continue to use other meridians for internal purposes. The prime meridian determines the proper Eastern and Western Hemispheres , although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E. This is not to be conflated with
864-507: The Kartographer extension Geographic coordinate system A geographic coordinate system ( GCS ) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude . It is the simplest, oldest and most widely used of the various spatial reference systems that are in use, and forms the basis for most others. Although latitude and longitude form
900-536: The back and was attached with a leather strap to the cover of a Coptic codex (Codex A, MS 813 Chester Beatty Library, Dublin). It was found near Sakkara, Egypt, under the ruins of the monastery Apa Jeremiah. Further earliest bookmarks and remnants of them have been found in Coptic codices dating from the 1st to the 11th century and in Carolingian codices from the 8th to the 12th century. Bookmarks were used throughout
936-418: The binding. Furthermore, other bookmarks incorporate a page-flap that enables them to be clipped on a page. According to new results of the research done on the history of bookmarks, there are indications that bookmarks have accompanied codices since their first emergence in the 1st century AD. The earliest existing bookmark dates from the 6th century AD and it is made of ornamented leather lined with vellum on
972-577: The center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels , as they are parallel to the Equator and to each other. The North Pole is 90° N; the South Pole is 90° S. The 0° parallel of latitude is designated the Equator , the fundamental plane of all geographic coordinate systems. The Equator divides the globe into Northern and Southern Hemispheres . The longitude λ of
1008-649: The default datum used for the Global Positioning System , and the International Terrestrial Reference System and Frame (ITRF), used for estimating continental drift and crustal deformation . The distance to Earth's center can be used both for very deep positions and for positions in space. Local datums chosen by a national cartographical organization include the North American Datum ,
1044-490: The distance they give is correct within a centimeter.) The formulae both return units of meters per degree. An alternative method to estimate the length of a longitudinal degree at latitude ϕ {\displaystyle \phi } is to assume a spherical Earth (to get the width per minute and second, divide by 60 and 3600, respectively): where Earth's average meridional radius M r {\displaystyle \textstyle {M_{r}}\,\!}
1080-474: The full adoption of longitude and latitude, rather than measuring latitude in terms of the length of the midsummer day. Ptolemy's 2nd-century Geography used the same prime meridian but measured latitude from the Equator instead. After their work was translated into Arabic in the 9th century, Al-Khwārizmī 's Book of the Description of the Earth corrected Marinus' and Ptolemy's errors regarding
1116-781: The length of the Mediterranean Sea , causing medieval Arabic cartography to use a prime meridian around 10° east of Ptolemy's line. Mathematical cartography resumed in Europe following Maximus Planudes ' recovery of Ptolemy's text a little before 1300; the text was translated into Latin at Florence by Jacopo d'Angelo around 1407. In 1884, the United States hosted the International Meridian Conference , attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt
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1152-461: The location has moved, but because the reference system used to measure it has shifted. Because any spatial reference system or map projection is ultimately calculated from latitude and longitude, it is crucial that they clearly state the datum on which they are based. For example, a UTM coordinate based on WGS84 will be different than a UTM coordinate based on NAD27 for the same location. Converting coordinates from one datum to another requires
1188-595: The longitude of the Royal Observatory in Greenwich , England as the zero-reference line. The Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911. The latitude ϕ of a point on Earth's surface is the angle between the equatorial plane and the straight line that passes through that point and through (or close to)
1224-548: The medieval period, consisting usually of a small parchment strip attached to the edge of folio (or a piece of cord attached to headband). Modern bookmarks are available in a huge variety of materials in a multitude of designs and styles. Many are made of cardboard or heavy paper, but they are also constructed of paper, ribbon, fabric, felt, steel, wire, tin, beads, wood, plastic, vinyl, silver, gold, and other precious metals, some decorated with gemstones. The first detached, and therefore collectible, bookmarkers began to appear in
1260-463: The melting of the ice sheets of the last ice age , but neighboring Scotland is rising by only 0.2 cm . These changes are insignificant if a local datum is used, but are statistically significant if a global datum is used. On the GRS 80 or WGS 84 spheroid at sea level at the Equator, one latitudinal second measures 30.715 m , one latitudinal minute is 1843 m and one latitudinal degree
1296-512: The same location. The invention of a geographic coordinate system is generally credited to Eratosthenes of Cyrene , who composed his now-lost Geography at the Library of Alexandria in the 3rd century BC. A century later, Hipparchus of Nicaea improved on this system by determining latitude from stellar measurements rather than solar altitude and determining longitude by timings of lunar eclipses , rather than dead reckoning . In
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