The Geographica (Γεωγραφικά, Geōgraphiká; Geographica or Strabonis Rerum Geographicarum Libri XVII, "Strabo's 17 Books on Geographical Topics") or Geography is an encyclopedia of geographical knowledge, consisting of 17 'books', written in Greek and attributed to Strabo, an educated citizen of the Roman Empire of Greek descent. There is a fragmentary palimpsest dating to the fifth century. The earliest manuscripts of books 1–9 date to the tenth century, with a 13th-century manuscript containing the entire text.
Strabo refers to his Geography within it by several names:
geōgraphia, "description of the earth"
chōrographia, "description of the land"
periēgēsis, "an outline"
periodos gēs, "circuit of the earth"
periodeia tēs chōrās, "circuit of the land"
Apart from the "outline", two words recur, "earth" and "country." Something of a theorist, Strabo explains what he means by Geography and Chorography:It is the sea more than anything else that defines the contours of the land (geōgraphei) and gives it its shape, by forming gulfs, deep seas, straits and likewise isthmuses, peninsulas, and promontories; but both the rivers and the mountains assist the seas herein. It is through such natural features that we gain a clear conception of continents, nations, favourable positions of cities and all the other diversified details with which our geographical map (chorographikos pinax) is filled.
From this description it is clear that by geography Strabo means ancient physical geography and by chorography, political geography. The two are combined in this work, which makes a "circuit of the earth" detailing the physical and political features. Strabo often uses the adjective geōgraphika with reference to the works of others and to geography in general, but not of his own work. In the Middle Ages it became the standard name used of his work.
The date of Geographica is a large topic, perhaps because Strabo worked on it along with his History for most of his adult life.