Al-Khwārizmī (780-850) wrote The Image of the Earth (Kitab surat al-ard), in which he used the Geography (Ptolemy) of Ptolemy but improved upon his values for the Mediterranean Sea, Asia, and Africa.
Ibn Khurdadhbih (820-912) authored a book of administrative geography Book of the Routes and Provinces (Kitab al-masalik wa'l-mamalik), which is the earliest surviving Arabic work of its kind.