GeoVRML 2.0 Recommended Practice
| previous
next
contents |
|
GeoVRML 2.0 Recommended Practice |
|
4.1 Coordinate System DefinitionsThe following table defines all of the geographic coordinate systems that are supported by GeoVRML 2.0. Only the GDC, GCC, and UTM coordinate systems are supported for encoding coordinates (i.e. in a geoSystem string of a GeoVRML node); the others may be specified within a GeoMetadata node. The codes for each coordinate system are taken from the SEDRIS Spatial Reference Model (SRM) [SED97].
Code Name GDC Geodetic GCC Geocentric GEI Geocentric Equatorial Inertial GSE Geocentric Solar Ecliptic GSM Geocentric Solar Magnetospheric SM Solar Magnetic GCS Global Coordinate System PS Polar Stereographic PCS LCC Lambert Conformal Conic PCS TM Transverse Mercator UTM Universal Transverse Mercator LST Local Space Rectangular
4.2 Ellipsoid DefinitionsThe following table defines all of the ellipsoid definitions that are supported by GeoVRML 2.0. The codes for each ellipsoid are taken from the SEDRIS SRM. These codes may be used within the geoSystem string for various GeoVRML nodes. The WGS84 geoid (mean sea level) can be specified by extending the ellipsoid code with GD.
Code Ellipsoid Name Semi-Major Axis
(meters)Inv. Flattening
(F-1)AA Airy 1830 6377563.396 299.3249646 AM Modified Airy 6377340.189 299.3249646 AN Australian National 6378160 298.25 BN Bessel 1841 (Namibia) 6377483.865 299.1528128 BR Bessel 1841 (Ethiopia Indonesia...) 6377397.155 299.1528128 CC Clarke 1866 6378206.4 294.9786982 CD Clarke 1880 6379249.145 293.465 EA Everest (India 1830) 6377276.345 300.8017 EB Everest (Sabah & Sarawak) 6377298.556 300.8017 EC Everest (India 1956) 6377301.243 300.8017 ED Everest (W. Malaysia 1969) 6377295.664 300.8017 EE Everest (W. Malaysia & Singapore 1948) 6377304.063 300.8017 FA Modified Fischer 1960 6378155 298.3 HE Helmert 1906 6378200 298.3 HO Hough 1960 6378270 297 IN International 1924 6378388 297 KA Krassovsky 1940 6378245 298.3 RF Geodetic Reference System 1980 (GRS 80) 6378137 298.257222101 SA South American 1969 6378160 298.25 WD WGS 72 6378135 298.26 WE WGS 84 6378137 298.257223563
4.3 Datum DefinitionsThe following table defines all of the geodetic datums that can be used to define a coordinate system with GeoVRML 2.0. GeoVRML 2.0 does not support the use of these in the geoSystem fields of GeoVRML nodes. Only the reference ellipsoids listed above are currently supported. However, the following datum codes may be specified within a GeoMetadata node to document the data. These code are taken from the SEDRIS SRM [SED97].
Datum Code Datum Name Reference Ellipsoid Applicable Extent ADI-A Adindan CD Ethiopia ADI-B Adindan CD Sudan ADI-C Adindan CD Mali ADI-D Adindan CD Senegal ADI-E Adindan CD Burkina Faso ADI-F Adindan CD Cameroon ADI-M Adindan CD MEAN FOR Ethiopia, Sudan AFG Afgooye KA Somalia AIA Antigua Island Astro 1943 CD Antigua (Leeward Islands) AIN-A Ainel Abd 1970 IN Bahrain AIN-B Ainel Abd 1970 IN Saudi Arabia ANO Anna1 Astro 1965 AN Cocos Islands ARF-A Arc 1950 CD Botswana ARF-B Arc 1950 CD Lesotho ARF-C Arc 1950 CD Malawi ARF-D Arc 1950 CD Swaziland ARF-E Arc 1950 CD Zaire ARF-F Arc 1950 CD Zambia ARF-G Arc 1950 CD Zimbabwe ARF-H Arc 1950 CD Burundi ARF-M Arc 1950 CD MEAN FOR Botswana, Lesotho, Malawi, Swaziland, Zaire Zambia, Zimbabwe ARS Arc 1960 CD MEAN FOR Kenya, Tanzania ASC Ascension Island 1958 IN Ascension Island ASM Montserrat Island Astro 1958 CD Montserrat (Leeward Islands) ASQ Astronomical Station 1952 IN Marcus Island ATF Astro Beacon E 1945 IN Iwo Jima AUA Australian Geodetic 1966 AN Australia & Tasmania AUG Australian Geodetic 1984 AN Australia & Tasmania BAT Djakarta (Batavia) BR Indonesia (Sumatra) BER Bermuda 1957 CC Bermuda BID Bissau IN Guinea-Bissau BOO Bogota Observatory IN Colombia BUR Bukit Rimpah BR Indonesia (Bangka Belitung Islands) CAC Cape Canaveral CC Bahamas, Florida CAI Campo Inchauspe IN Argentina CAO Canton Astro 1966 IN Phoenix Islands CAP Cape CD South Africa CAZ Camp Area Astro IN Antarctica (McMurdo Camp Area) CGE Carthage CD Tunisia CHI Chatham Island Astro 1971 IN New Zealand (Chatham Island) CHU Chua Astro IN Paraguay COA Corrego Alegre IN Brazil DAL Dabola CD Guinea DOB GUX1 Astro IN Guadalcanal Island EAS Easter Island 1967 IN Easter Island ENW Wake-Eniwetok1960 HO Marshall Islands EUR-A European 1950 IN MEAN FOR Austria, Denmark, France, West Germany, Netherlands, Switzerland EUR-B European 1950 IN Greece EUR-C European 1950 IN Finland, Norway EUR-D European 1950 IN Portugal, Spain EUR-E European 1950 IN Cyprus EUR-F European 1950 IN Egypt EUR-G European 1950 IN England, Channel Islands, Scotland, Shetland Islands EUR-H European 1950 IN Iran EUR-I European 1950 IN Italy (Sardinia) EUR-J European 1950 IN Italy (Sicily) EUR-K European 1950 IN England, Ireland, Scotland, Shetland Islands EUR-L European 1950 IN Malta EUR-M European 1950 IN MEAN FOR Austria, Belgium, Denmark, Finland, France, West Germany, Gibralter, Greece, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland EUR-S European 1950 IN MEAN FOR Iraq, Israel, Jordan, Lebanon, Kuwait, Saudi Arabia, Syria EUS European 1979 IN MEAN FOR Austria, Finland, Netherlands, Norway, Spain, Sweden, Switzerland FAH Oman CD Oman FLO Observatorio Meteorologico 1939 IN Azores (Corvo FloresIslands) FOT Fort Thomas 1955 CD Nevis, St.Kitts (Leeward Islands) GAA Gan 1970 IN Republic of Maldives GEO Geodetic Datum 1949 IN New Zealand GIZ DOS 1968 IN New Georgia Islands (Gizo Island) GRA Graciosa Base SW 1948 IN Azores (Faial, Graciosa, Pico, Sao Jorge, Terceira) GSE GunungSegara BR Indonesia (Kalimantan) GUA Guam 1963 CC Guam HEN Herat North IN Afghanistan HIT Provisional South Chilean 1963 IN South Chile (Near 53 0 S) (HitoXVIII) HJO Hjorsey 1955 IN Iceland HKD HongKong 1963 IN Hong Kong HTN Hu-Tzu-Shan IN Taiwan IBE Bellevue (IGN) IN Efate & Erromango Islands IND-B Indian EA Bangladesh IND-I Indian EC India, Nepal INF-A Indian 1954 EA Thailand, Vietnam INH-A Indian 1975 EA Thailand IRL Ireland 1965 AM Ireland ISG ISTS061 Astro 1968 IN South Georgia Islands IST ISTS073 Astro 1969 IN Diego Garcia JOH Johnston Island 1961 IN Johnston Island KAN Kandawala EA Sri Lanka KEA Kertau 1948 EE West Malaysia & Singapore KEG KerguelenIsland 1949 IN Kerguelen Island KUS Kusaie Astro 1951 IN Caroline Islands LCF L.C.5 Astro 1961 CC Cayman Brac Island LEH Leigon CD Ghana LIB Liberia 1964 CD Liberia LUZ-A Luzon CC Philippines (Excluding Mindanao) LUZ-B Luzon CC Philippines (Mindanao) MAS Massawa BR Ethiopia (Eritrea) MER Merchich CD Morocco MID Midway Astro 1961 IN Midway Islands MIK Mahe 1971 CD Mahe Island MIN-A Minna CD Cameroon MIN-B Minna CD Nigeria MOD Rome 1940 IN Italy (Sardinia) MPO M'Poraloko CD Gabon MVS Viti Levu 1916 CD Fiji (Viti Levu Island) NAH-A Nahrwan CD Oman (Masirah Island) NAH-B Nahrwan CD United Arab Emirates NAH-C Nahrwan CD Saudi Arabia NAP Naparima BWI IN Trinidad & Tobago NAR-A North American 1983 RF Alaska NAR-B North American 1983 RF Canada NAR-C North American 1983 RF CONUS NAR-D North American 1983 RF Mexico, Central America NAS-A North American 1927 CC MEAN FOR CONUS (East of Mississippi River) including Louisiana, Missouri, Minnesota NAS-B North American 1927 CC MEAN FOR CONUS (West of Mississippi River) excluding Louisiana, Missouri, Minnesota NAS-C North American 1927 CC MEAN FOR CONUS NAS-D North American 1927 CC Alaska NAS-E North American 1927 CC MEAN FOR Canada NAS-F North American 1927 CC Canada (Alberta, British Columbia) NAS-G North American 1927 CC Canada (New Brunswick, Newfoundland, Nova Scotia, Quebec) NAS-H North American 1927 CC Canada (Manitoba, Ontario) NAS-I North American 1927 CC Canada (Northwest Territories, Saskatchewan) NAS-J North American 1927 CC Canada (Yukon) NAS-L North American 1927 CC Mexico NAS-N North American 1927 CC MEAN FOR Belize, CostaRica, El Salvador, Guatemala, Honduras, Nicaragua NAS-O North American 1927 CC Canal Zone NAS-P North American 1927 CC MEAN FOR Antigua, Barbados, Barbuda, Caicos Islands, Cuba, Dominican Republic, Grand Cayman, Jamaica, Turks Islands NAS-Q North American 1927 CC Bahamas (Except San Salvador Island) NAS-R North American 1927 CC Bahamas (San Salvador Island) NAS-T North American 1927 CC Cuba NAS-U North American 1927 CC Greenland (Hayes Peninsula) OEG Old Egyptian 1907 HE Egypt OGB-A Ordnance Survey Great Britain 1936 AA England OGB-B Ordnance Survey Great Britain 1936 AA England Isle of Man, Wales OGB-C Ordnance Survey Great Britain 1936 AA Scotland, Shetland, Islands OGB-D Ordnance Survey Great Britain 1936 AA Wales OGB-M Ordnance Survey Great Britain 1936 AA MEAN FOR England, Isle of Man, Scotland, Shetland Islands, Wales OHA-A Old Hawaiian CC Hawaii OHA-B Old Hawaiian CC Kauai OHA-C Old Hawaiian CC Maui OHA-D Old Hawaiian CC Oahu OHA-M Old Hawaiian CC MEAN FOR Hawaii, Kauai, Maui, Oahu PHA Ayabelle Lighthouse CD Djibouti PIT Pitcairn Astro 1967 IN Pitcairn Island PLN Picodelas Nieves IN Canary Islands POS PortoSanto1936 IN Porto Santo, Madeira Islands PRP-A Provisional South American 1956 IN Bolivia PRP-B Provisional South American 1956 IN Northern Chile (Near 19 0 S) PRP-C Provisional South American 1956 IN Southern Chile (Near 43 0 S) PRP-D Provisional South American 1956 IN Colombia PRP-E Provisional South American 1956 IN Ecuador PRP-F Provisional South American 1956 IN Guyana PRP-G Provisional South American 1956 IN Peru PRP-H Provisional South American 1956 IN Venezuela PRP-M Provisional South American 1956 IN MEAN FOR Bolivia, Chile, Colombia, Ecuador, Guyana, Peru, Venezuela PTB Point 58 CD MEAN FOR Burkina Faso & Niger PTN Pointe Noire 1948 CD Congo PUR Puerto Rico CC PuertoRico VirginIslands QAT Qatar National IN Qatar QUO Qornoq IN Greenland(South) REU Reunion IN Mascarene Islands SAE Santo (DOS) 1965 IN Espirito Santo Island SAN-A South American 1969 SA Argentina SAN-B South American 1969 SA Bolivia SAN-C South American 1969 SA Brazil SAN-D South American 1969 SA Chile SAN-E South American 1969 SA Colombia SAN-F South American 1969 SA Ecuador (excluding Galapagos Islands) SAN-G South American 1969 SA Guyana SAN-H South American 1969 SA Paraguay SAN-I South American 1969 SA Peru SAN-J South American 1969 SA Ecuador (Baltra, Galapagos Islands) SAN-K South American 1969 SA Trinidad &Tobago SAN-L South American 1969 SA Venezuela SAN-M South American 1969 SA MEAN FOR Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Trinidad &Tobago, Venezuela SAO Sao Braz IN Azores (Sao Miguel, Santa Maria Islands) SAP Sapper Hill 1943 IN East Falkland Island SCK Schwarzeck BN Namibia SGM Selvagem Grande 1938 IN Salvage Islands SHB Astro DOS 71/4 IN St. Helena Island SOA South Asia FA Singapore TAN Tananarive Observatory 1925 IN Madagascar TDC Tristan Astro 1968 IN Tristanda Cunha TIL Timbalai 1948 EB Brunei, East Malaysia (Sabah, Sarawak) TOY-A Tokyo BR Japan TOY-B Tokyo BR Korea TOY-C Tokyo BR Okinawa TOY-M Tokyo BR MEAN FOR Japan, Korea, Okinawa TRN Astro Tern Island (FRIG) 1961 IN Tern Island W72 WGS 1972 WD Global Definition W84 WGS 1984 WE Global Definition WAK Wake Island Astro 1952 IN Wake Atoll YAC Yacare IN Uruguay ZAN Zanderij IN Suriname
Questions or comments.
Copyright 2000, SRI International.