Geography in medieval Islam in the context of "Muhammad al-Idrisi"

The Ptolemy world map is a map of the world known to Greco-Roman societies in the 2nd century. It is based on the description contained in Ptolemy's book Geography, written c. 150. Based on an inscription in several of the earliest surviving manuscripts, it is traditionally credited to Agathodaemon of Alexandria.

Notable features of Ptolemy's map is the first use of longitudinal and latitudinal lines as well as specifying terrestrial locations by celestial observations. The Geography was translated from Greek into Arabic in the 9th century and played a role in the work of al-Khwārizmī before lapsing into obscurity. The idea of a global coordinate system revolutionized European geographical thought, however, and inspired more mathematical treatment of cartography.

The Nuzhat al-mushtāq fī ikhtirāq al-āfāq (Arabic: نزهة المشتاق في اختراق الآفاق, lit. "The Excursion of One Eager to Penetrate the Distant Horizons"), commonly known in the West as the Tabula Rogeriana (lit. "The Book of Roger" in Latin), is an atlas commissioned by the Norman King Roger II in 1138 and completed by the Arab geographer Muhammad al-Idrisi in 1154. The atlas compiles 70 maps of the known world with associated descriptions and commentary of each specific location by Al-Idrisi.

Zanj (Arabic: زَنْج, adj. زنجي, Zanjī; from Persian: زنگ, romanized: Zang) is a term used by medieval Muslim geographers to refer to both a certain portion of Southeast Africa (primarily the Swahili Coast) and to its Bantu inhabitants. It has also been used to refer to Africans collectively by Arab sources. This word is also the origin of the place-names Zanzibar ("coast of the Zanji") and the Sea of Zanj.

The latinization Zingium serves as an archaic name for the coastal area in modern Kenya and Tanzania in southern East Africa. The architecture of these commercial urban settlements is now a subject of study for urban planning. For centuries the coastal settlements were a source of ivory, gold, and slaves, from sections of the conquered hinterland, to the Indian Ocean world.

Abu Ishaq Ibrahim ibn Muhammad al-Farisi al-Istakhri (آبو إسحاق إبراهيم بن محمد الفارسي الإصطخري) (also Estakhri, Persian: استخری, i.e. from the Iranian city of Istakhr, b. – d. 346 AH/AD 957) was a 10th-century travel author and Islamic geographer who wrote valuable accounts in Arabic of the many Muslim territories he visited during the Abbasid era of the Islamic Golden Age. These accounts would include both maps and descriptions of the Muslim world he was discussing. Istakhri also belonged to the Balkhi school of cartography, which he helped to popularize. Istakhri's writing style was innovative for its addition of Islamic traditions throughout the text, and for its inclusion in conjunction with the maps he presented. Istakhri met the celebrated traveller-geographer Ibn Hawqal, while travelling, and Ibn Hawqal incorporated the work of Istakhri in his book Kitab al-Surat al-Ard.

Ahmad ibn 'Abdallah al-Marwazi, known as Habash al-Hasib (Persian: حبش الحاسب, lit. 'Abyssinian calculator', died c. 869) was a Persian astronomer, geographer, and mathematician from Merv in Khorasan, who discovered the trigonometric ratios tangent, and cotangent. Al-Biruni who cited Habash in his work, expanded his astronomical tables.

Habash al-Hasib flourished in Baghdad, and died a centenarian some time between 864 and 874 possibly in Abbasid Samarra. The title "Habash" (Abbyssian) may refer to dark skin color. He worked under two Abbasid caliphs, al-Ma'mun and al-Mu'tasim.