Ma'anar ƙamus na "geomancer" shine mutumin da yake yin duba ta hanyar fassara alamu a ƙasa, musamman ta hanyar tsarawa ko jifan duwatsu, sanduna, ko alamar ƙasa. Har ila yau, a wasu lokuta ana amfani da ita don yin nuni ga wanda ya yi nazari ko aiki da tsohuwar fasaha ta duba bisa tafsirin tsarin duniya da al'amuran halitta. Kalmar “geomancer” ta fito ne daga kalmomin Helenanci “geo,” ma’ana ƙasa, da kuma “manteia,” ma’ana duba ko annabci.