The most common way is to identify the location using coordinates such as latitude and longitude.
Lines of longitude and latitude crisscross the earth.
Half time is the time needed for half of a given quantity of an isotope to decay in its byproducts.
Comparing the quantity of the parent form and the byproduct will give a numerical value for the age of the material containing such isotopes.
Sometimes beds of rock can turn over the other way, so be very cautious when relatively dating rocks!
Absolute dating(also known as radiometric dating) is based by the measurement of the content of specific radioactive isotopes of which the "half time" is known.
Latitude is used to mark the north-south position of a location on the Earth’s surface and ranges from 0 degrees at the equator to 90 degrees at the North and South Poles.
There are 180 degrees of latitude and the distance between each degree of latitude is roughly 69 miles (111 km).
For example, overview or locator maps show the relative location of a place or entity based on a larger geographic view.
For example, the inset map below, shows the relative location of the state of Texas within the United States.
A person living in Spartanburg, South Carolina would describe the river as being located north and east of them.