Chii chinonzi geodetic system?
A geodetic datum kana geodetic system (zvakare: geodetic reference datum, geodetic reference system, kana geodetic reference frame) inonzi global datum reference kana reference frame yekuratidzira zvakarurama nzvimbo yenzvimbo dziri paPasi kana dzimwe nzvimbo dzepasi kuburikidza ne geodetic coordinates. Mazuva anokosha nokuda kworuzivo rwupi norwupi kana kuti unyanzvi hunobva panzvimbo yomuchadenga, kubatanidza geodesy, kufamba nechikepe, kuongorora, gadziriro yoruzivo rwenzvimbo, kunzwa uri kure, uye kugadzira mepu. Dhata yakatwasuka inoshandiswa kuyera nzvimbo iri pamusoro pePasi, mu latitude uye longitude kana imwe hurongwa hwehurongwa; dhata yakatwasuka inoshandiswa kuyera kukwirira kana kudzika zvine chekuita neyakajairwa mavambo, senge avhareji yegungwa (MSL). Kubvira pakatanga kushandiswa gadziriro yeGlobal Positioning System (GPS), ellipsoid uye datum yeWGS 84 yainoshandisa yakatsiva dzimwe dzose mukushandisa kwakawanda. WGS 84 yakagadzirirwa kushandiswa munyika yose, kusiyana nemamwe mashoko akare.