|
Cascais Tide Gauge
The Cascais tide gauge ( pt, Marégrafo de Cascais) was the first tide gauge (also known as a mareograph or marigraph, as well as a sea-level recorder) installed in Portugal and dates back to 1882. It is situated in Cascais Municipality, Lisbon District. It was one of the first systems of sea-level data collection installed on the coast of Europe and is still in use. History Located at the entrance to the Bay of Cascais, below the Citadel of Cascais and to the northeast side of Cascais Marina, and covered by a hemispherical dome, this tide gauge was built in 1877 in Paris by the clockmakers Amédée-Philippe Borrel and Jean Wagner. The gauge was considered necessary because of the difficulties with access to the port of Lisbon as a result of a sand bar in the river Tagus. When it began operations there were only three other sites with similar equipment in the world, at Brest, Aberdeen and Hook of Holland. It was originally installed in 1882 at another location, close to the marine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tide Gauge
A tide gauge is a device for measuring the change in sea level relative to a vertical datum. It its also known as mareograph, marigraph, sea-level recorder and limnimeter. When applied to freshwater continental water bodies, the instrument may also be called a limnimeter. Operation Sensors continuously record the height of the water level with respect to a height reference surface close to the geoid. Water enters the device by the bottom pipe (far end of the tube, see picture), and electronic sensors measure its height and send the data to a tiny computer. Historical data are available for about 1,450 stations worldwide, of which about 950 have provided updates to the global data center since January 2010. At some places records cover centuries, for example in Amsterdam where data dating back to 1700 is available. When it comes to estimating the greater ocean picture, new modern tide gauges can often be improved upon by using satellite data. Tide gauges are used to measure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carlos I Of Portugal
''Dom'' Carlos I (; English: King Charles of Portugal; 28 September 1863 – 1 February 1908), known as the Diplomat ( pt, o Diplomata), the Martyr ( pt, o Martirizado), and the Oceanographer ( pt, o Oceanógrafo), among many other names, was the King of Portugal from 1889 until his assassination in 1908. He was the first Portuguese king to die a violent death since King Sebastian in 1578. Early life Carlos was born in Lisbon, Portugal, the son of King Luís and Queen Maria Pia, daughter of King Victor Emmanuel II of Italy, and was a member of the House of Braganza."While remaining patrilineal dynasts of the duchy of Saxe-Coburg and Gotha according to pp. 88, 116 of the 1944 ''Almanach de Gotha'', Title 1, Chapter 1, Article 5 of th1838 Portuguese constitutiondeclared, with respect to Ferdinand II of Portugal's issue by his first wife, that 'the Most Serene House of Braganza is the reigning house of Portugal and continues through the Person of the Lady Queen Maria II' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centro De Informação Geoespacial Do Exército
The Army Geospatial Information Center ( pt, Centro de Informação Geoespacial do Exército; CIGeoE) is the military geographical, cartographical and geospatial intelligence agency of the Portuguese Army. The main mission of the CIGeoE is to provide the Army and the other branches of the Armed Forces of Portugal, as well as the civil community, with geographic information, ensuring the implementation of activities related to the geographical science, cartographic technique and the promotion and development of scientific and technological research actions in the field of geographical support and geomatic Geomatics is defined in the ISO/TC 211 series of standards as the " discipline concerned with the collection, distribution, storage, analysis, processing, presentation of geographic data or geographic information". Under another definition, it ...s. This mission includes the geospatial intelligence (GEOINT) and imagery intelligence (IMINT) activities in support of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Permanent Service For Mean Sea Level
The Permanent Service for Mean Sea Level is a repository for tide gauge data used in the measurement of long-term sea level change. The PSMSL is based at the National Oceanography Centre The National Oceanography Centre (NOC) is a marine science research and technology institution based on two sites in Southampton and Liverpool, United Kingdom. It is the UK’s largest institution for integrated sea level science, coastal and d ... in Liverpool, England. It was founded in 1933 as the International Union of Geodesy and Geophysics, IUGG Mean Sea Level Committee, and adopted as a Permanent Service of the International Council for Science (ICSU) in 1958. The tide gauge data are freely accessible by all, and consist predominantly of monthly-mean and annual-mean sea levels. The primary,"Revised Local Reference" data set has a continuous history of benchmark surveys for each gauge, ensuring that sea level is measured relative to a known land-based datum. There is also a "Metric" data ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barograph
A barograph is a barometer that records the barometric pressure over time in graphical form. This instrument is also used to make a continuous recording of atmospheric pressure. The pressure-sensitive element, a partially evacuated metal cylinder, is linked to a pen arm in such a way that the vertical displacement of the pen is proportional to the changes in the atmospheric pressure. Development Alexander Cumming, a watchmaker and mechanic, has a claim to having made the first effective recording barograph in the 1760s using an aneroid cell.Gloria Clifton (2004)"Cumming, Alexander (1731/2–1814)", ''Oxford Dictionary of National Biography'', Oxford University Press. (Subscription or UK public library membership required) Cumming created a series of barometrical clocks, including one for King George III. However, this type of design fell out of favour. Since the amount of movement that can be generated by a single aneroid is minuscule, up to seven aneroids (so called Vidie-cans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mean Sea Level
There are several kinds of mean in mathematics Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ..., especially in statistics. Each mean serves to summarize a given group of data, often to better understand the overall value (magnitude (mathematics), magnitude and sign (mathematics), sign) of a given data set. For a data set, the ''arithmetic mean'', also known as "arithmetic average", is a measure of central tendency of a finite set of numbers: specifically, the sum of the values divided by the number of values. The arithmetic mean of a set of numbers ''x''1, ''x''2, ..., x''n'' is typically denoted using an overhead bar, \bar. If the data set were based on a series of observations obtained by sampling (statistics), sampling from a statistical population, the arithmetic mean is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zero-level Elevation
In geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum, is a reference coordinate surface used for vertical positions, such as the elevations of Earth-bound features (terrain, bathymetry, water level, and built structures) and altitudes of satellite orbits and in aviation. In planetary science, vertical datums are also known as zero-elevation surface or zero-level reference. Commonly adopted criteria for a vertical datum include the following approaches: * Tides, based on sea level when specific conditions occur, such as NOAA's National Geodetic Survey-produced Tidal Datums; * Gravimetric, based on a geoid; or geometric, based on the same Earth ellipsoids that are used in computing a horizontal datum, such as NOAA's planned gravimetric and Global Navigation Satellite Systems (GNSS)-based Datum of 2022 set to be released that year by the National Geodetic Survey. Prominent vertical datums in use by professionals include the National Geodetic Vertic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Altimeter
An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level. The measurement of altitude is called altimetry, which is related to the term bathymetry, the measurement of depth under water. The most common unit for altimeter calibration worldwide is hectopascals (hPa), except for North America (other than Canada ) and Japan where inches of mercury (inHg) are used. To obtain an accurate altitude reading in either feet or meters, the local barometric pressure must be calibrated correctly using the barometric formula. History The scientific principles behind the altimeter were first written by Alexander Bryce (minister), Rev. Alexander Bryce a Scottish minister and astronomer in 1772 who realised that the principles of a barometer could be adjusted to measure height. Pressure altimeter Altitude can be determined based on the measurement of atmospheric pressure. The greater the altitude, the lower the pressure. When a barometer is s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geodesy
Geodesy ( ) is the Earth science of accurately measuring and understanding Earth's figure (geometric shape and size), orientation in space, and gravity. The field also incorporates studies of how these properties change over time and equivalent measurements for other planets (known as '' planetary geodesy''). Geodynamical phenomena, including crustal motion, tides and polar motion, can be studied by designing global and national control networks, applying space geodesy and terrestrial geodetic techniques and relying on datums and coordinate systems. The job title is geodesist or geodetic surveyor. History Definition The word geodesy comes from the Ancient Greek word ''geodaisia'' (literally, "division of Earth"). It is primarily concerned with positioning within the temporally varying gravitational field. Geodesy in the German-speaking world is divided into "higher geodesy" ( or ), which is concerned with measuring Earth on the global scale, and "practical geodes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hook Of Holland
Hook of Holland ( nl, Hoek van Holland, ) is a town in the southwestern corner of Holland, hence the name; ''hoek'' means "corner" and was the word in use before the word ''kaap'' – "cape", from Portuguese ''cabo'' – became Dutch. The English translation using Hook is a false cognate of the Dutch Hoek, but has become commonplace (in official government records in English, the name tends not to get translated and Hoek van Holland is used). It is located at the mouth of the New Waterway shipping canal into the North Sea. The town is administered by the municipality of Rotterdam as a district of that city. Its district covers an area of 16.7 km2, of which 13.92 km2 is land. On 1 January 1999 it had an estimated population of 9,400. Towns near "the Hook" ( nl, "de Hoek") include Monster, 's-Gravenzande, Naaldwijk and Delft to the northeast, and Maassluis to the southeast. On the other side of the river is the Europort and the Maasvlakte. The wide sandy beach, one sectio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portugal
Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of the Azores and Madeira. It features the westernmost point in continental Europe, and its Iberian portion is bordered to the west and south by the Atlantic Ocean and to the north and east by Spain, the sole country to have a land border with Portugal. Its two archipelagos form two autonomous regions with their own regional governments. Lisbon is the capital and largest city by population. Portugal is the oldest continuously existing nation state on the Iberian Peninsula and one of the oldest in Europe, its territory having been continuously settled, invaded and fought over since prehistoric times. It was inhabited by pre-Celtic and Celtic peoples who had contact with Phoenicians and Ancient Greek traders, it was ruled by the Ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
