Which error in surveying is caused by the observer's mistakes?

Which coordinate system is commonly used in surveying to represent the Earth's surface?
-

What is the term for the difference between the true north and magnetic north?

What is the main function of a total station in surveying?

What is the process of measuring angles and distances to determine the position of points on the Earth's surface?

What type of cement is commonly used in the construction of water-retaining structures like dams?

Which type of lime is used for whitewashing purposes?

What is the purpose of using admixtures in concrete?

Which of the following is a common use for bitumen in construction?

What is the primary advantage of using fly ash in concrete?