What is the ruling concerning money I earned from my work in a surveying office that changes the coordinates of surveying points after I have submitted my work, given that I later became aware of this deception?

There is no blame upon the questioner regarding his salary, as long as he is not involved in cheating by altering grades. The responsibility for cheating falls on the perpetrator or those who directly assisted in it. The questioner's salary is in exchange for his permissible work that he performs, and he is only responsible for his own actions, as Allah Almighty says: "And whoever earns sin, he earns it only against himself" and His saying: "You are not tasked except with yourself."