How do you calculate Latitude and longitude precisely?

4 answers

I use a map or a database. Many people use GPS.

For other methods, check these sites.

http://www.google.com/search?source=ig&hl=en&rlz=1G1GGLQ_ENUS308&q=calculate+Latitude+and+longitude+&aq=f&aqi=g5g-m1&aql=&oq=&gs_rfai=CXI91ZBXHTJzvC4PuMNrTpZ4OAAAAqgQFT9ChKug
but i need it for school. i need to be able to do it myself using a map
Thank you for clarifying your question.

Study this site.

http://www.compassdude.com/latitude-longitude.shtml

Then, post a couple of your specific questions and your answers. I'll be glad to help you from there.
thank you so much. ok well here is an example my teacher gave us:
the position of Patras.
5°=300'
300'=5.6cm (the height of the square on the atlas.)

5.6=300

3.6cm (the distance from the bottom of the square to the city)

3.6=300 divided by 5.6 multiplied by 3.6

3.6(cm)=192(')
=3°12'= 38°12' N