Determining the coordinates with the help of technological means such as satellites, or with the help of printed atlases.
How Are The Times Calculated?
Determining the time zone
Determining climatic and geological factors such as heat, humidity and air pressure.
Determining whether summer/winter times are used.
The altitude of the city calculated and the height of tallest building people live in is determined and added to the calculation.
Determining the north-east-south-west points of the city and using fixed Tamkin (caution) to cover the land dispersion.