Geography

 Geography is the study of places and the relationships between people and their environments. Geographers explore both the physical properties of Earth's surface and the human societies spread across it.

Eratosthenes, the ancient Greek scholar is called the 'father of geography. He was the first one to use the word geography and he also had a small-scale notion of the planet that helped him to determine the circumference of the earth.

Latitudes are horizontal lines that measure distance north or south of the equator. Longitudes are vertical lines that measure east or west of the meridian in Greenwich, England. Together, latitude and longitude enable cartographers, geographers and others to locate points or places on the globe.

River.

A river is a large, natural stream of flowing water. Rivers are found on every continent and on nearly every kind of land. Some flow all year round. Others flow seasonally or during wet years.

Find a time of place.

One can calculate the time accurately using the longitude of the place. Time experienced by a place is dependent on the rotation of the earth around the Sun causing the effect of night and day. Different longitudes experience different local times.

example.

Find a longitude of place