wiktionarypar datumDatum is the singular form of data . Datum may also refer to Datum geodesy , a standard position or level that measurements are taken from Datum magazine Datum magazine , an Austrian monthly magazine Kavala or Datum, a city in ancient Macedonia Omne Datum Optimum , a papal bull issued by Pope Innocent II in 1139 disambig nl Datum fi Datum ur ... more details
In the British Isles , an Ordnance Datum or OD is a Geodetic system Vertical data vertical datum used by an ordnance survey as the basis for deriving altitude s on map s. A spot height may be expressed as AOD for above ordnance datum . Usually mean sea level MSL is used for the datum. In particular In Great Britain , OD for the Ordnance Survey is ODN Ordnance Datum Newlyn , defined as the MSL at Newlyn in Cornwall between 1915 and 1921. Prior to 1921, OD was taken from the level of the Victoria Dock Liverpool Victoria Dock, Liverpool . In Northern Ireland , OD for the Ordnance Survey of Northern Ireland is Belfast Ordnance Datum , the MSL at Clarendon Lock, Belfast between 1951 and 1956. In the Republic of Ireland , OD for the Ordnance Survey of Ireland is Malin Ordnance Datum the MSL at Portmoor Pier, Malin Head , County Donegal , between 1960 and 1969 ref name osi http www.osi.ie gps overview irishgrid.asp Irish Grid Reference System from OSI website ref . Prior to 1970, Poolbeg Ordnance Datum was used the low water of spring tide at Poolbeg lighthouse , Dublin , on 8 April 1837. Poolbeg OD was about 2.7 m lower than Malin OD ref name osi . Tunnel Datum Tunnel Datum is a datum based on Ordnance Datum used in designing tunnels which pass below sea level. By using a lower datum as the base point, negative numbers can be avoided in calculations, eliminating a possible source of mistakes. for the London Underground , a tunnel datum of ODN &minus 100m is used ref cite web url http www.tfl.gov.uk assets downloads victoria Environmental Statement Main Report.pdf title Victoria Station Upgrade Environmental Statement Main Report date 2007 11 15 publisher Transport for London pages p.2 6 2.5.4, fn 2 accessdate 2008 07 28 format PDF ref thus a depth of 60 m is 40m ATD above tunnel datum for the Channel Tunnel , a tunnel datum of ODN &minus 200m is used ref cite book last Radcliffe first Eric title Engineering the Channel Tunnel editor Colin J Kirkland publisher Taylor & Francis ... more details
Unreferenced date March 2009 Datum reference are a concept used in carpentry , metalworking , needlework , Geometric dimensioning and tolerancing GD&T and similar activities. In carpentry, an alternative, more common name is face side and face edge . The artisan nominates two straight edges on a workpiece as the datum edges , and they are marked accordingly. One convention is to mark the first datum edge with a single slanted line and the second with double lines . For most work, the datum references of the workpiece need to be Perpendicular square . If necessary they may be cut, planed or filed to make them so. In subsequent marking out, all measurements are then taken from either of the two datum references. Engineering In GD&T, datum reference frames are typically Three dimensional space 3D . Datum reference frames are used as part of the feature control frame to show where the measurement is taken from. A typical datum reference frame is made up of three planes. For example, the three planes could be one face side and two datum edges . These three planes are marked A, B and C, where A is the face side, B is the first datum edge, and C is the second datum edge. In this case, the datum reference frame is A B C. A B C is shown at the end of feature control frame to show from where ... before choosing which feature is A, B,or C. For this example, A is the primary datum, B is the secondary, and C is the tertiary datum. The primary datum controls the most degrees of freedom. The tertiary datum controls the least degrees of freedom. For this example, of a block of wood, Datum ... translation and 3 rotation about the 3D coordinate system . Datum A controls 3, translastion along the Z axis, rotation about the x axis, and rotation about the y axis. Datum B controls 2, translation along the y axis and rotation about the z axis. Finally, Datum C controls 1 degree of freedom, namely the translation along the x axis. See also Datum geodesy Surface plate Category Woodworking ru ... more details
Datum is an Austria n monthly magazine . Founded in 2004 by journalist Klaus Stimeder and businessman Hannes Weyringer, Datum is published by the Association to Promote Quality Journalism Verein zur F rderung des Qualit tsjournalismus eleven times a year. The wikt circulation circulation is 10.000 copies. The magazine aims to be an alternative in the Austrian media market, providing long articles with background information. Topics covered are Austrian politics , foreign policy , Mass media media and culture . In September 2005, Tyler Br l elected Datum best news magazine in his Fast Lane Media Awards . In his Financial Times column, he stated Austria s Datum is showing others how it should be done. With its slightly off, always iconic covers, matte paper stock and sharp lay outs it s become a cult favourite among art directors around the world. The website s a thing of beauty, too. External links de icon http www.datum.at Datum Website http www.myspace.com datummag Datum Myspace Category Austrian magazines Category Political magazines Category News magazines Category Publications established in 2004 Europe poli mag stub de Datum Zeitschrift ... more details
and Datum geodesy into Geodetic datum date July 2009 A geodetic datum plural datums , not data is a reference from which measurements are made. In surveying and geodesy , a datum is a set of reference ... drawing drafting , a datum is a reference point, surface, or axis on an object against which measurements are made. Image Chicago City Datum.jpg thumb right City of Chicago Datum Benchmark Reference datums A reference datum mathematical model is a known and constant surface which is used to describe ... depending on the datum used to make the measurement. There are hundreds of locally developed reference ... . The North American Datum of 1927 NAD 27 is the horizontal control datum for the United States ... to be zero. Geodetic positions on the North American Datum of 1927 were derived from the coordinates ... Datum of 1983 NAD 83 is The horizontal control datum for the United States, Canada, Mexico, and Central America, based on a geocentric origin and the Geodetic Reference System 1980 GRS80 . This datum ... faq.shtml WGS84 WGS84 on the site of National Geodetic Survey ref The WGS84 datum, which is almost identical to the NAD83 datum used in North America, is the only world referencing system in place today. WGS84 is the default standard datum for coordinates stored in recreational and commercial GPS units. Users of GPS are cautioned that they must always check the datum of the maps they are using. To correctly enter, display, and to store map related map coordinates, the datum of the map must be entered into the GPS map datum field. Vertical datums A vertical datum is used for measuring ... of mountains etc. For the purpose of measuring the height of objects on land, the usual datum ... strength, and so the height of MSL, relative to a geodetic datum, will vary around the world, and even ..., in Great Britain, the national vertical datum, Ordnance Datum Newlyn, is based on what was mean sea level at Newlyn in Cornwall between 1915 and 1921 . A different principle is used when choosing a datum ... more details
In mathematics, the root datum donn e radicielle in French of a connected split reductive group reductive algebraic group over a field is a generalization of a root system that determines the group up to isomorphism. They were introduced by M. Demazure in Grothendieck s S minaire de g om trie alg brique SGA III , published in 1970. Definition A root datum consists of a quadruple X sup sup , &Delta , X sub sub , &Delta sup v sup , where X sup sup and X sub sub are free abelian groups of finite Rank linear algebra rank together with a perfect pairing between them with values in Z which we denote by , in other words, each is identified with the dual lattice of the other . &Delta is a finite subset of X sup sup and &Delta sup v sup is a finite subset of X sub sub and there is a bijection from &Delta onto &Delta sup v sup , denoted by &alpha &rarr &alpha sup v sup . For each &alpha , &alpha , &alpha sup v sup 2 For each &alpha , the map taking x to x &minus x ,&alpha sup v sup &alpha induces an automorphism of the root datum in other words it maps &Delta to &Delta and the induced action on X sub sub maps &Delta sup v sup to &Delta sup v sup The elements of &Delta are called the roots of the root datum, and the elements of &Delta sup v sup are called the coroots . If &Delta does not contain 2&alpha for any &alpha in &Delta then the root datum is called reduced . The root datum of an algebraic ... root datum is a quadruple X sup sup , &Delta , X sub sub , &Delta sup v sup , where X sup sup is the lattice ... datum, which is always reduced. Conversely for any root datum there is a reductive algebraic group. A root datum contains slightly more information than the Dynkin diagram , because it also determines the center of the group. For any root datum X sup sup , &Delta , X sub sub , &Delta sup v sup , we can define a dual root datum X sub sub , &Delta sup v sup , X sup sup , &Delta by switching the characters ... L sup G is the complex connected reductive group whose root datum is dual to that of G . References ... more details
Datum Peak coor dm 77 58 S 163 48 E is a peak 1,575 m near the southwest extremity of Hobbs Ridge , rising above the south side of Gauss Glacier , 1.6 nautical miles 3.0 km west of Williams Peak , in Victoria Land . The name is one of a group in the area associated with surveying applied in 1993 by New Zealand Geographic Board NZGB . Named from datum a practical representation of a reference system , a geodesy and surveying term defined by fixed coordinates. usgs gazetteer Category Mountains of Antarctica EAntarctica geo stub ... more details
The Australian Height Datum is a geodetic datum for altitude measurement in Australia . According to Geoscience Australia , In 1971 the mean sea level for 1966 1968 was assigned the value of zero on the Australian Height Datum at thirty tide gauges around the coast of the Australian continent. The resulting datum surface, with minor modifications in two metropolitan areas, has been termed the Australian Height Datum AHD and was adopted by the National Mapping Council as the datum to which all vertical control for mapping and other surveying functions is to be referred. References http www.ga.gov.au earth monitoring geodesy geodetic datums australian height datum ahd.html Geoscience Australia AHD information http www.bom.gov.au lam glossary apagegl.shtml BoM glossary Australia gov stub category Government of Australia Category Geography of Australia ... more details
unreferenced date March 2011 Omne Datum Optimum Latin for Every perfect gift , a quotation from the Epistle of James was a Papal Bull issued by Pope Innocent II in 1139 that initially endorsed the Order of the Poor Knights of Christ and of the Temple of Solomon Knights Templar , in which the Templar Rule was officially approved, and pope papal protection given. Additionally, Omne Datum Optimum promised all spoils from Muslim conquest to the Order, and made the Order exempt from tithes and taxes. Although Omne Datum Optimum was an unusual bull in and of itself, it was followed by Pope Celestine II s Milites Templi in 1144 and Pope Eugene III s Militia Dei in 1145, which together gave the Templars an extraordinary range of rights and privileges. Among other things, the Order was permitted to build its own churches, bury their dead on those church grounds and collect taxes on Templar properties once a year. The unique cemeteries constructed by the Templars proved to be extremely controversial. External links Category Knights Templar Category 1139 works Category 12th century papal bulls de Omne datum optimum es Omne datum optimum eo Omne datum optimum fr Omne datum optimum id Omne Datum Optimum it Omne Datum Optimum he mk Omne Datum Optimum nl Omne Datum Optimum sl Omne Datum Optimum ... more details
The Sea Level Datum of 1929 was the vertical control datum geodesy datum established for vertical control surveying in the United States United States of America by the General Adjustment of 1929. The datum was used to measure elevation altitude above, and depression geology depression wikt depth depth below, mean sea level MSL . Mean sea level was measured at 26 tide gauges 21 in the United States and 5 in Canada . The datum was defined by the observed heights of mean sea level at the 26 tide gauges and by the set of elevations of all bench marks resulting from the adjustment. The adjustment required a total of 66,315 miles 106,724 km of leveling with 246 closed circuits and 25 circuits at sea level. Since the Sea Level Datum of 1929 was a hybrid model, it was not a pure model of mean sea level , the geoid , or any other equipotential surface. Therefore, it was renamed the National Geodetic Vertical Datum of 1929 NGVD 29 in 1973. The NGVD 29 was subsequently replaced by the North American Vertical Datum of 1988 NAVD 88 based upon the General Adjustment of the North American Datum of 1988. See also Altitude Datum geodesy Geodesy Mean sea level North American Vertical Datum of 1988 Storm Surge Topographic elevation Topography Reference ellipsoid Geoid External links cite web url http www.usgs.gov title United States Geological Survey home page cite web url http www.ngs.noaa.gov title U.S. National Geodetic Survey home page cite web url http www.ngs.noaa.gov CORS Proxy Glossary xml NGS Glossary.xml title Geodetic Glossary publisher U.S. National Geodetic Survey United States National Geodetic Survey cite web url http www.ngs.noaa.gov cgi bin VERTCON vert con.prl title Orthometric Height Conversion tool publisher U.S. National Geodetic Survey United States National Geodetic Survey Category Topography Category Geodesy Category Cartography Category Surveying Category Geodesic datums ms Datum Aras Laut 1929 ... more details
in the lengths and conversion values of the time. North American Datum of 1983 Because Earth deviates ... region by region across the world. Clarke 1866, and North American Datum of 1927 with it, were surveyed ..., and it became the foundation for the North American Datum of 1983. Though generally GRS 80 and its ... NAD27 and NAD83 File Datum Shift Between NAD27 and NAD83.png thumb Datum Shift Between NAD27 and NAD83 ... to specify the datum along with the coordinates. The North American Datum of 1927 is defined by the latitude ... American Datum of 1983 is based on a newer defined spheroid GRS 80 it is an Earth centered or geocentric datum having no initial point or initial direction. North American Datum 83 and WGS84 The initial ... of a meter over much of the US. Each datum has undergone refinements with more accurate and later measurements ... of North American Datum The US National Spatial Reference System of 2007 NSRS2007 , also called NAD83 2007 , is a refinement of the NAD83 datum using data from a network of very accurate GPS receivers ... projections de North American Datum ... more details
Unreferenced stub auto yes date December 2009 First appearance datum is a term used by geologist s and Paleontology paleontologists to designate the first oldest appearance of a species in the geologic record. In other words, FADs represent the geologically oldest fossil of a particular species that has yet been discovered. FADs are frequently used to designate segments in the Geologic time scale . For example, the beginning of the Tremadocian Stage of the Ordovician Period is marked by the first appearance FAD of the conodont Iapetognathus fluctivagus in the geologic record. This occurs in Stratigraphy bed 23 of the rock formation known as the Green Point section, located in western Newfoundland island Newfoundland , as well as in geologically correlated Stratum strata in many parts of the world. DEFAULTSORT First Appearance Datum Category Historical geology Category Paleontology Paleo stub Geology stub ... more details
The North American Vertical Datum of 1988 NAVD 88 is the vertical control Datum geodesy datum of orthometric height established for vertical control surveying in the United States United States of America based upon the General Adjustment of the North American Datum of 1988. The NAVD 88 was established in 1991 by the minimum constraint adjustment of geodetic leveling observations in Canada , the United States , and Mexico . It held fixed the height of the primary tidal bench mark, referenced to the International Great Lakes Datum of 1985 local mean sea level height value, at Rimouski , Quebec , Canada . Additional tidal bench mark elevations were not used due to the demonstrated variations in sea surface topography, i.e., the fact that mean sea level is not the same equipotential surface at all tidal bench marks. The NAVD 88 replaced the National Geodetic Vertical Datum of 1929 NGVD 29 , previously known as the Sea Level Datum of 1929 . It is important to note that, while the computed elevation of some fixed point might differ depending on which datum is used, the elevation of that point relative to some other near by point did not change with that datum change. See also Altitude Geodesy National Geodetic Vertical Datum of 1929 Sea Level Datum of 1929 Topographic elevation Topography Reference ellipsoid Geoid External links cite web url http www.usgs.gov title United States Geological Survey home page cite web url http www.ngs.noaa.gov title U.S. National Geodetic Survey home page cite web url http www.ngs.noaa.gov CORS Proxy Glossary xml NGS Glossary.xml title Geodetic Glossary publisher U.S. National Geodetic Survey United States National Geodetic Survey cite web url http www.ngs.noaa.gov cgi bin VERTCON vert con.prl title Orthometric Height Conversion tool publisher U.S. National Geodetic Survey United States National Geodetic Survey Category Geodesy Category Topography Category Surveying Category Geodesic datums ms Datum Tegak Amerika Utara 1988 ... more details
orphan date April 2010 Self Locating Datum Marker Buoys SLDMB A drifting surface buoy designed to measure surface ocean currents. The design is based on those of the Coastal Ocean Dynamics Experiment CODE and Davis style oceanographic surface drifters National Science Foundation NSF funded experiments exploring ocean surface currents. The SLDMB was designed for deployment by United States Coast Guard USCG vessels in search and rescue SAR missions, and is equipped with a Global Positioning Satellite GPS sensor that, upon deployment in fresh or saltwater, transmits its location periodically to the USCG to aid in SAR missions. Additionally, SLDMB are deployed in oceanographic research in order to study surface currents of the ocean. This design has also been utilized by Nomis Connectivity for secure ocean based communications. Design The SLDMB is based on the Davis style drifter design, which attempts to minimize the effects of wind and surface waves. ref name Davis Davis, R. E. 1985 . Drifter Observations of Coastal Surface Currents During CODE The Method and Descriptive View. Journal of Geophysical Research, 90 C3 , 14. . ref This is accomplished by reducing the area above the ocean surface to small floats and an antenna. Below the surface is a series of drogue vanes to approximately 1 meter in depth, which catch the ocean current, along with electronic equipment that deploys the vanes and antenna, receives the GPS signal and transmits the location to the USCG. SLDMB construction varies by manufacturer, but those used by the USCG consists of four orthogonal drag vanes 0.5m wide and 0.7m high of nylon fabric. These are supported by PVC arms at top and bottom, which extend from a cylindrical hull that contains the electronic equipment. Small floats are attached to the end of each upper arm in order to maintain buoyancy, and a small antenna projects above the SLDMB. ref name Bang Bang, I., Mooers, C. N. K., Haus, B., Turner, C., Lewandowski, M. 2007 . Technical Report Surface ... more details
Summary Kratice sad ovo je sada nja slika, bris izbri i ovu staru ina icu, vra vrati na ovu staru ina icu. Kliknite na odre eni datum da vidite sliku koja je stavljena na taj datum. Licensing PD old 100 ... more details
Ostrovica is a village in Croatia in the Zadar county , in the Li ane Ostrovi ke municipality at coord 43 57 32 N 15 47 37 E . Near the village there is a ruined medieval castle of the ubi noble family. External links http www.destinacije.com datum nav.asp?lang slo&pg 1&datum 25.08.2007.&cp 21&s Next Village of Ostrovica http www.destinacije.com datum nav.asp?lang hr&pg 1&datum 25.08.2007.&cp 4&s Next Ruins of Ostrovica Castle Category Zadar County Zadar geo stub bs Ostrovica hr Ostrovica Li ane Ostrovi ke sl Ostrovica, Hrva ka sr ... more details
from German wikipedia Beschreibung Christian Worch Quelle selbst fotografiert Benutzer Aufkl rer Fotograf oder Zeichner Antifaschistische Aktion Gera AAG Datum bei einer rechtsextremen Kundgebung am 18.10.03 in Erfurt cc by sa 2.0 ... more details
Beschreibung Leittransparent der Hanfparade2005 Quelle B ndnis Hanfparade e.V. Fotograf Astrid Winkel Datum 13.08.2005 Berlin, Rosenthaler Stra e PD user UsualRedAnt de date December 2005 Category Cannabis events ... more details
Summary The Horn is the most prominent peak on the Mount Buffalo National Park Mount Buffalo plateau at an elevation of convert 1723 m ft 0 lk on Australian Height Datum AHD . Licensing self cc by sa 3.0 ... more details
In hydrology , crest is the highest level above a certain point the datum point, or reference point that a river will reach in a certain amount of time. This term is usually limited to a flooding event. Category Hydrology geo term stub ... more details
ODN can be Optical Distribution Network the physical fibre and optical devices that distribute signals to users in a FTTx network. ODN ISP ODN a US company that specializes in emergency use of satellite technology, OrbitalData.net ODN ISP ODN a Japanese Internet Service Provider . Ordnance Datum Newlyn , the mean sea level height datum in Great Britain. OXUS Development Network a French Micro Finance institution. CpG Oligodeoxynucleotide also known as a CpG ODN, has immunostimulatory properties disambig it ODN ... more details
About the geodetic datum ED 50 in pharmacology effective dose Unreferenced date February 2007 ED 50 European Dat 1950 is a datum geodesy geodetic datum which was defined after World War II for the international connection of geodetic network s. Some of the important battles of World War II were fought on the borders of Germany , the Netherlands , Belgium and France , and the mapping of these countries had incompatible latitude and longitude positioning. This led to the setting up of ED50 as a consistent mapping datum for much of Western Europe . It was, and still is, used in much of Western Europe apart from Great Britain , Ireland , Sweden and Switzerland , which have their own datums. It was based on the International Ellipsoid of 1924 John Fillmore Hayford Hayford Ellipsoid of 1909 Earth radius radius of the Earth s equator 6378.388 km, flattening 1 297 and widely used all over the world up to the 1980s, when GRS80 and WGS84 were established. Many national coordinate systems of Gauss Kr ger coordinate system Gauss Kr ger are defined by ED50 and oriented by means of geodetic astronomy . Up to now it has been used in data base s of gravity field, cadastre , small surveying networks in Europe and America, and by some developing countries with no modern baselines. The geodetic datum of ED50 is centred at the Munich Frauenkirche in southern Germany , where the approximate centre ... Transverse Mercator coordinate system UTM up to the 1980s. Datum shift between ED50 and WGS84 .... The datum shift for the Universal Transverse Mercator grid is different. The eastings vary ... ED50 Equator is about 200 m south of the WGS84 one. See also The Great Britain datum OSGB36 . For Ireland, the Irish Transverse Mercator . The Sweden datum RT90 . The Switzerland datum CH1903 . The French datum Nouvelle triangulation de la France NTF Category Geodesy Category Geographic coordinate systems ca European Datum 1950 de Europ isches Datum 1950 es ED50 it ED50 nl ED50 pt ED50 ... more details
Orphan date April 2010 The New Zealand Map Grid NZMG is a map projection based on the New Zealand Datum geodesy Geodetic Datum 1949. ref http www.linz.govt.nz geodetic datums projections heights projections new zealand map grid index.aspx , Land Information New Zealand ref It has now been replaced by the New Zealand Transverse Mercator 2000 projection, which is based on the New Zealand Geodetic Datum 2000 using the GRS80 reference ellipsoid. ref http www.linz.govt.nz geodetic datums projections heights projections new zealand transverse mercator 2000 index.aspx , Land Information New Zealand ref This is the grid setting used for GPS in New Zealand. References Reflist Category Geography of New Zealand ... more details
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