Attribute: Horizontal datum

Only permitted for the meta object M_HOPA

Acronym: HORDAT

Code: 400 - Spatial and Meta Object Attribute

Attribute Type: E

Expected input:

ID	Meaning	INT 1	S-4
`1`	`WGS 72`
`2`	`WGS 84`
`3`	`European 1950`
`4`	`Potsdam Datum`
`5`	`Adindan`
`6`	`Afgooye`
`7`	`Ain el Abd 1970`
`8`	`Anna 1 Astro 1965`
`9`	`Antigua Island Astro 1943`
`10`	`Arc 1950`
`11`	`Arc 1960`
`12`	`Ascension Island 1958`
`13`	`Astro beacon "E" 1945`
`14`	`Astro DOS 71/4`
`15`	`Astro Tern Island (FRIG) 1961`
`16`	`Astronomical Station 1952`
`17`	`Australian Geodetic 1966`
`18`	`Australian Geodetic 1984`
`19`	`Ayabelle Lighthouse`
`20`	`Bellevue (IGN)`
`21`	`Bermuda 1957`
`22`	`Bissau`
`23`	`Bogota Observatory`
`24`	`Bukit Rimpah`
`25`	`Camp Area Astro`
`26`	`Campo Inchauspe 1969`
`27`	`Canton Astro 1966`
`28`	`Cape`
`29`	`Cape Canaveral`
`30`	`Carthage`
`31`	`Chatam Island Astro 1971`
`32`	`Chua Astro`
`33`	`Corrego Alegre`
`34`	`Dabola`
`35`	`Djakarta (Batavia)`
`36`	`DOS 1968`
`37`	`Easter Island 1967`
`38`	`European 1979`
`39`	`Fort Thomas 1955`
`40`	`Gan 1970`
`41`	`Geodetic Datum 1949`
`42`	`Graciosa Base SW 1948`
`43`	`Guam 1963`
`44`	`Gunung Segara`
`45`	`GUX 1 Astro`
`46`	`Herat North`
`47`	`Hjorsey 1955`
`48`	`Hong Kong 1963`
`49`	`Hu-Tzu-Shan`
`50`	`Indian`
`51`	`Indian 1954`
`52`	`Indian 1975`
`53`	`Ireland 1965`
`54`	`ISTS 061 Astro 1968`
`55`	`ISTS 073 Astro 1969`
`56`	`Johnston Island 1961`
`57`	`Kandawala`
`58`	`Kerguelen Island 1949`
`59`	`Kertau 1948`
`60`	`Kusaie Astro 1951`
`61`	`L. C. 5 Astro 1961`
`62`	`Leigon`
`63`	`Liberia 1964`
`64`	`Luzon`
`65`	`Mahe 1971`
`66`	`Massawa`
`67`	`Merchich`
`68`	`Midway Astro 1961`
`69`	`Minna`
`70`	`Montserrat Island Astro 1958`
`71`	`M’Poraloko`
`72`	`Nahrwan`
`73`	`Naparima, BWI`
`74`	`North American 1927`
`75`	`North American 1983`
`76`	`Observatorio Meteorologico 1939`
`77`	`Old Egyptian 1907`
`78`	`Old Hawaiian`
`79`	`Oman`
`80`	`Ordnance Survey of Great Britain 1936`
`81`	`Pico de las Nieves`
`82`	`Pitcairn Astro 1967`
`83`	`Point 58`
`84`	`Pointe Noire 1948`
`85`	`Porto Santo 1936`
`86`	`Provisional South American 1956`
`87`	`Provisional South Chilean 1963 (also known as Hito XVIII 1963)`
`88`	`Puerto Rico`
`89`	`Qatar national`
`90`	`Qornoq`
`91`	`Reunion`
`92`	`Rome 1940`
`93`	`Santo (DOS) 1965`
`94`	`Sao Braz`
`95`	`Sapper Hill 1943`
`96`	`Schwarzeck`
`97`	`Selvagem Grande 1938`
`98`	`South American 1969`
`99`	`South Asia`
`100`	`Tananarive Observatory 1925`
`101`	`Timbalai 1948`
`102`	`Tokyo`
`103`	`Tristan Astro 1968`
`104`	`Viti Levu 1916`
`105`	`Wake-Eniwetok 1960`
`106`	`Wake Island Astro 1952`
`107`	`Yacare`
`108`	`Zanderij`
`109`	`American Samoa 1962`
`110`	`Deception Island Indian 1960`
`112`	`Indonesian 1974`
`113`	`North Sahara 1959`
`114`	`Pulkovo 1942`
`115`	`S-42 (Pulkovo 1942)`
`116`	`S-JYSK`
`117`	`Voirol 1950`
`118`	`Average Terrestrial System 1977`
`119`	`Compensation G�od�sique du Qu�bec 1977`
`120`	`Finnish (KKJ)`
`121`	`Ordnance Survey of Ireland`
`122`	`Revised Kertau`
`123`	`Revised Nahrwan`
`124`	`GGRS 76 (Greece)`
`125`	`Nouvelle Triangulation de France`
`126`	`RT 90 (Sweden)`
`127`	`Geocentric Datum of Australia (GDA)`
`128`	`BJZ54 (A954 Beijing Coordinates)`
`129`	`Modified BJZ54`
`130`	`GDZ80`
`131`	`Local datum`

Remarks: All necessary information for conversion of geographic coordinates from most of the Geodetic Datums in the above list to WGS-84 is contained in the "User’s Handbook on Datum Transformations involving WGS-84", prepared by the US Defense Mapping Agency and which is available from the IHB as IHO Publication S-60 (English and French Versions), along with an associated standard datum transformation software on floppy disk called "MADTRAN". The resulting latitude and longitude offsets can be encoded in the attribute SHIPAM.

Object Classes that use HORDAT