The history of map-making is given below. Number the events in the sequence in which they took place.

• Gerardus Mercator was the first to draw a world map in 1538.
• Modern map-making was started by the ancient Greeks. Ptolemy in the second century CE was the first to make a collection of maps called Geographia.
• Remote Sensing was introduced in the 1970s. It led to the development of Geographic Information System or GIS.
• Later, the first modern atlas Theatrum Orbis Terrarum was published in 1570.
• The history of maps dates back to 4,500 years. During that time maps were pictorial and were drawn without any scale or accuracy.
• During the Medieval period, the Arab geographers excelled in map-making.
• The earliest known map, that is still preserved, is in the form of a small baked clay tablet. It was made in about 2300 BCE and shows a part of Babylonia (present-day Iraq).
• The introduction of aerial photography in the nineteenth century started a new phase in landform surveys which enhanced map-making.

The correct sequence is as follows:

1. The history of maps dates back to 4,500 years. During that time maps were pictorial and were drawn without any scale or accuracy.
2. The earliest known map, that is still preserved, is in the form of a small baked clay tablet. It was made in about 2300 BCE and shows a part of Babylonia (present-day Iraq).
3. Modern map-making was started by the ancient Greeks. Ptolemy in the second century CE was the first to make a collection of maps called Geographia.
4. During the Medieval period, the Arab geographers excelled in map-making.
5. Gerardus Mercator was the first to draw a world map in 1538.
6. Later, the first modern atlas Theatrum Orbis Terrarum was published in 1570.
7. The introduction of aerial photography in the nineteenth century started a new phase in landform surveys which enhanced map-making.
8. Remote Sensing was introduced in the 1970s. It led to the development of Geographic Information System or GIS.