Learn Russian: Ради межевания участка мы позвали иного геодезиста. - For the sake of surveying the plot, we called a different surveyor.

Иной and другой both mean "other" or "different," but they have slightly different nuances. Другой often simply implies "another one" (e.g., a second surveyor). Иной carries a stronger nuance of "different in kind" or "a completely different" one. At B2, you will start seeing иной used to emphasize contrast, though другого would also be grammatically correct here.

Why do иного геодезиста look like they are in the Genitive case when they are the direct object of the verb позвали?

This is because геодезист (surveyor) is an animate masculine noun. For animate masculine singular nouns, the Accusative case (which marks the direct object) borrows the exact same endings as the Genitive case. Therefore, the nominative иной геодезист becomes иного геодезиста.

Why are both межевания and участка in the Genitive case?

This is a common "Genitive chain." First, the preposition ради (for the sake of) strictly requires the Genitive case, giving us ради межевания. Then, участка is in the Genitive case to show a relationship or possession, translating to "the surveying of the plot."

What is the root of the word межевание (surveying)?