| http://dbpedia.org/ontology/abstract
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The Swedish grid (in Swedish Rikets Nät, R … The Swedish grid (in Swedish Rikets Nät, RT 90) is the coordinate system used for government maps in Sweden. RT 90 is a slightly modified version of the RT 38 from 1938. While the system could be used with negative numbers to represent all four "quarters" of the earth (NE, NW, SE, and SW hemispheres), the standard application of RT 90 is only useful for the northern half of the eastern hemisphere where numbers are positive. The coordinate system is based on metric measures rooting from the crossing of the Prime Meridian and the Equator at 0,0. The Central Meridian used to be based on a meridian located at the old observatory in Stockholm, but today it is based on the Prime Meridian at Greenwich. The numbering system's first digit represents the largest distance, followed by what can be seen as fractional decimal digits (though without an explicit decimal point). Therefore, X 65 is located halfway between X 6 and X 7.The coordinate grid is specified using two numbers, named X and Y, X being the south–north axis and Y the west–east axis. Two seven-digit numbers are sufficient to specify a location with a one m resolution. Example:X=6620000 Y=1317000 (X is the northing and Y is the easting) denotes a position 6620 km north of the Equator and -183 km (1317 km-1500 km) west of the Central Meridian, which happens to be somewhere near the town center of Arvika. somewhere near the town center of Arvika.
, RT 90, Rikets Triangelnät eller Rikets koo … RT 90, Rikets Triangelnät eller Rikets koordinatsystem 1990, är ett rikstäckande rätvinkligt plant koordinatnät och var det referenssystem som allmänna svenska kartor baserades på. Rikets nät eller Swedish Grid är en variant med beteckningen RT 90 2,5 gon V 0:-15. RT 90 ersatte det äldre RT 38 (Rikets koordinatnät baserat på rikets triangelnät i 1938 års system) och har i sin tur ersatts av referenssystemet SWEREF 99. Det används för att positionera sig på äldre svenska landkartor från Lantmäteriet. Den bygger på ellipsoiden Bessel 1841, och en Gauss-Krüger kartprojektion. Ellipsoiden används för att bestämma hur marken ligger just på vårt ställe på jordklotet, eftersom jorden är ojämn så behövs olika ellipsoider på olika ställen på jorden. Kartprojektionen bestämmer hur punkter läggs från den "runda" ellipsoiden till den plana kartan. SOS Alarm, Försvarsmakten och Räddningstjänsten i Sverige använder numera SWEREF 99. Försvarsmakten använder numera koordinatsystemet MGRS i referenssystemet WGS 84. SOS Alarm begär koordinater av allmänheten i formaten RT90, WGS84, Sweref99TM eller decimaler.n RT90, WGS84, Sweref99TM eller decimaler.
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http://www.lantmateriet.se/en/Maps-and-geographic-information/GPS-and-geodetic-surveys/Reference-systems/Two-dimensional-systems/RT-90/ +
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1994698
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2282
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878601578
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http://dbpedia.org/resource/Swedish_language +
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http://dbpedia.org/resource/Template:Sweden-geo-stub +
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http://dbpedia.org/resource/Category:Geographic_coordinate_systems +
, http://dbpedia.org/resource/Category:Geography_of_Sweden +
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| rdfs:comment |
The Swedish grid (in Swedish Rikets Nät, R … The Swedish grid (in Swedish Rikets Nät, RT 90) is the coordinate system used for government maps in Sweden. RT 90 is a slightly modified version of the RT 38 from 1938. While the system could be used with negative numbers to represent all four "quarters" of the earth (NE, NW, SE, and SW hemispheres), the standard application of RT 90 is only useful for the northern half of the eastern hemisphere where numbers are positive. The coordinate system is based on metric measures rooting from the crossing of the Prime Meridian and the Equator at 0,0. The Central Meridian used to be based on a meridian located at the old observatory in Stockholm, but today it is based on the Prime Meridian at Greenwich. The numbering system's first digit represents the largest distance, followed by what can be seegest distance, followed by what can be see
, RT 90, Rikets Triangelnät eller Rikets koo … RT 90, Rikets Triangelnät eller Rikets koordinatsystem 1990, är ett rikstäckande rätvinkligt plant koordinatnät och var det referenssystem som allmänna svenska kartor baserades på. Rikets nät eller Swedish Grid är en variant med beteckningen RT 90 2,5 gon V 0:-15. RT 90 ersatte det äldre RT 38 (Rikets koordinatnät baserat på rikets triangelnät i 1938 års system) och har i sin tur ersatts av referenssystemet SWEREF 99.tur ersatts av referenssystemet SWEREF 99.
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| rdfs:label |
RT 90
, Swedish grid
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