Identify the coordinate system being used
Read the first value as the x-coordinate
Read the second value as the y-coordinate
Read the third value as the z-coordinate if it is a 3D coordinate
Use the order given, usually x then y
Check whether the coordinates are written as a pair or a triple
Note the sign of each value
Positive x is usually right, negative x is usually left
Positive y is usually up, negative y is usually down
Plot the point starting from the origin
Move along the x-axis first
Then move along the y-axis
Then move along the z-axis if needed
Read latitude and longitude as a separate coordinate format when applicable
Latitude comes before longitude in many formats
Confirm the units if the coordinates use degrees, meters, or another system