Monday, 5 March 2012
WORLD MAP 11TH CENTURY
WORLD MAP 2ND CENTURY
Description: Ptolemy world map ca. 150 AD. Claudius Ptolemaeus (Ptolemy), was a mathmatician, geographer, astronomer and astrologer who lived in the Hellenistic culture of Roman Egypt. One of his main works is his Geographia, a compilation of the known geography in the Roman Empire. This map is a reconstruction made in the 15th century.

WORLD MAP 6TH CENTURY
Babylonian map of the world, ca 600 BC
The Babylonian Map of the World is diagrammetic labelled depiction of the known world from the perspective of Babylonia. The map is incised on a claytablet, showing Babylon somewhat to the north of its center.
It is usually dated to the 6th century BC. It was discovered at sippar, southern Iraq, 60 miles (97 km) north of Babylon on the east bank of the Euphrates river, and published in 1899.The clay tablet resides at the British Museum.
It is usually dated to the 6th century BC. It was discovered at sippar, southern Iraq, 60 miles (97 km) north of Babylon on the east bank of the Euphrates river, and published in 1899.The clay tablet resides at the British Museum.
Wednesday, 25 January 2012
KAMAL
- Kamal Very simple instrument used primarily by Arabian navigators. It consists of a small board with a knotted piece of twine through the center. The observer holds one of the knots in his mouth and extends the board away so that the edges make a constant angle with his eyes.
- A kamal is a celestial navigation device that determines latitude. The invention of the kamal allowed for the earliest known latitude sailing, and was thus the earliest step towards the use of quantative methods in navigation. It originated with Arab navigators of the late 9th century, and was employed in the Indian Ocean from the 10th century. It was adopted by Indian navigators soon after,and then adopted by Chinese navigators some time before the 16th century.
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