The datum shift between two particular datums can vary from one place to another within one country or region, and can be anything from zero to hundreds of meters (or several kilometers for some remote islands).
Datum sané magingsir saking datum prasida matiosan ring genah sané siki sareng genah sané tiosan yadiastun saking widangan utawi negara sané pateh, raris prasida marupa napi kémanten saking nol ngantos panyatusan meter (utawi makudang kilometer yéning ring pola sané dohdoh).