Editing Geodetic datum (section)

=== Examples ===
Examples of map datums are:
* [[WGS 84]], 72, 66 and 60 of the [[World Geodetic System]]
* [[NAD 83]], the [[North American Datum]] which is very similar to WGS{{nbsp}}84
* [[North American Datum#North American Datum of 1927|NAD 27]], the older [[North American Datum]], of which NAD{{nbsp}}83 was basically a readjustment [http://www.ngs.noaa.gov/TOOLS/Nadcon/Nadcon.html]
* [[OSGB36]] of the [[Ordnance Survey]] of [[Great Britain]]
* [[European Terrestrial Reference System 1989|ETRS89]], the European Datum, related to [[International Terrestrial Reference System and Frame|ITRS]]
* [[ED50]], the older European Datum
* [[GDA94]], the Australian Datum<ref>{{cite web |last=Craven |first=Alex |title=GDA94 : Frequently Asked Questions |url=http://www.geoproject.com.au/gda.faq.html |url-status=live |archive-url=https://web.archive.org/web/20160815023907/http://www.geoproject.com.au/gda.faq.html |archive-date=2016-08-15 |website=Geoproject Solutions }}</ref>
* [[JGD2011]], the Japanese Datum, adjusted for changes caused by [[2011 Tōhoku earthquake and tsunami]]<ref>{{cite web|url=http://club.informatix.co.jp/?p=998|title=日本測地系2011（JGD2011）とは？ - 空間情報クラブ|date=2015-08-20|website=club.informatix.co.jp|url-status=live|archive-url=https://web.archive.org/web/20160820032137/http://club.informatix.co.jp/?p=998|archive-date=2016-08-20}}</ref>
* [[Tokyo97]], the older Japanese Datum<ref>{{cite web|url=http://www.gsi.go.jp/sokuchikijun/tky2jgd.html|title=座標変換ソフトウェア TKY2JGD｜国土地理院|website=www.gsi.go.jp|url-status=live|archive-url=https://web.archive.org/web/20171105201418/http://www.gsi.go.jp/sokuchikijun/tky2jgd.html|archive-date=2017-11-05}}</ref>
* [[KGD2002]], the Korean Datum<ref>{{cite journal | bibcode = 2007AGUSM.G33B..03Y | title=The Korean Datum Change to a World Geodetic System | journal=AGU Spring Meeting Abstracts | year=2007 |author1=Yang, H. |author2=Lee, Y. |author3=Choi, Y. |author4=Kwon, J. |author5=Lee, H. |author6=Jeong, K. | volume=2007 | pages=G33B–03 }}</ref>
* [[TWD67]] and [[TWD97]], different datum currently used in Taiwan.<ref>{{cite web|url=http://www.sunriver.com.tw/grid_tm2.htm|title=大地座標系統與二度分帶座標解讀 - 上河文化|last=台灣地圖夢想家-SunRiver|website=www.sunriver.com.tw|url-status=live|archive-url=https://web.archive.org/web/20160820192537/http://www.sunriver.com.tw/grid_tm2.htm|archive-date=2016-08-20}}</ref>
* [[BJS54]] and [[XAS80]], old geodetic datum used in China<ref>[http://www.chinaminingmagazine.com/ch/reader/view_abstract.aspx?file_no=20141431&flag=1 Analysis of Conversion Method and Map Merging from BJS54 XA80 Surveying and Mapping Results to CGCS2000] {{webarchive|url=https://web.archive.org/web/20160918005031/http://www.chinaminingmagazine.com/ch/reader/view_abstract.aspx?file_no=20141431&flag=1 |date=2016-09-18 }}</ref>
* [[Restrictions on geographic data in China#GCJ-02|GCJ-02]] and [[Baidu Maps#Coordinate system|BD-09]], Chinese encrypted geodetic datum.
* [[PZ-90|PZ-90.11]], the current geodetic reference used by [[GLONASS]]<ref>{{cite web|url=http://www.glonass-iac.ru/en/content/news/?ELEMENT_ID=721|title=The transition to using the terrestrial geocentric coordinate system "Parametry Zemli 1990" (PZ-90.11) in operating the GLObal NAvigation Satellite System (GLONASS) has been implemented|website=www.glonass-iac.ru|url-status=live|archive-url=https://web.archive.org/web/20150907014714/https://www.glonass-iac.ru/en/content/news/?ELEMENT_ID=721|archive-date=2015-09-07}}</ref>
* [[GTRF|Galileo Terrestrial Reference Frame (GTRF)]], the geodetic reference used by [[Galileo (satellite navigation)|Galileo]]; currently defined as ITRF2005<ref name=GNSS>{{cite web|url=http://www.unoosa.org/documents/pdf/icg/activities/2008/icg3/45.pdf|title=Use of international references for GNSS operations and applications|website=unoosa.org|url-status=live|archive-url=https://web.archive.org/web/20171222052312/http://www.unoosa.org/documents/pdf/icg/activities/2008/icg3/45.pdf|archive-date=2017-12-22}}</ref>
* [[CGCS2000]], or [[CGS-2000]], the geodetic reference used by [[BeiDou Navigation Satellite System]]; based on ITRF97<ref name=GNSS /><ref>Handbook of Satellite Orbits: From Kepler to GPS, Table 14.2</ref><ref>[http://www.beidou.gov.cn/attach/2013/12/26/20131226b8a6182fa73a4ab3a5f107f762283712.pdf BeiDou Navigation Satellite System Signal In Space Interface Control Document, Open Service Signal (Version 2.0)] {{webarchive|url=https://web.archive.org/web/20160708094247/http://www.beidou.gov.cn/attach/2013/12/26/20131226b8a6182fa73a4ab3a5f107f762283712.pdf |date=2016-07-08 }} section 3.2</ref>
* [[International Terrestrial Reference Frame]]s (ITRF88, 89, 90, 91, 92, 93, 94, 96, 97, 2000, 2005, 2008, 2014), different realizations of the [[International Terrestrial Reference System|ITRS]].<ref>{{cite web |url=http://www.quickclose.com.au/stanaway07pres.pdf |title=Archived copy |access-date=2016-08-19 |url-status=live |archive-url=https://web.archive.org/web/20170126050914/http://www.quickclose.com.au/stanaway07pres.pdf |archive-date=2017-01-26 }}</ref><ref>{{cite web|url=http://itrf.ensg.ign.fr/general.php|title=General concepts|website=itrf.ensg.ign.fr|url-status=live|archive-url=https://web.archive.org/web/20081204020715/http://itrf.ensg.ign.fr/general.php|archive-date=2008-12-04}}</ref>
* [[Hong Kong Principal Datum]], a vertical datum used in Hong Kong.<ref>{{cite web|url=  http://georepository.com/datum_5135/Hong-Kong-Principal-Datum.html|title=  Vertical Datum used in China – Hong Kong – onshore|url-status=  live|archive-url=  https://web.archive.org/web/20121113103618/http://georepository.com/datum_5135/Hong-Kong-Principal-Datum.html|archive-date=  2012-11-13}}</ref><ref>{{cite web|url=http://www.geodetic.gov.hk/data/pdf/explanatorynotes.pdf|title=Explanatory Notes on Geodetic Datums in Hong Kong|website=geodetic.gov.hk|url-status=dead|archive-url=https://web.archive.org/web/20161109121152/http://www.geodetic.gov.hk/data/pdf/explanatorynotes.pdf|archive-date=2016-11-09|access-date=2016-08-19}}</ref>
* [[SAD69]] - South American Datum 1969