History of cartography
Maps have been one of the most important human inventions, allowing humans to explain and navigate their way. When and how the earliest maps were made is unclear, but maps of local terrain are believed to have been independently invented by many cultures. The earliest putative maps include cave paintings and etchings on tusk and stone. Maps were produced extensively by ancient Babylon, Greece, Rome, China, and India.
The earliest maps ignored the curvature of Earth's surface, both because the shape of the Earth was unknown and because the curvature is not important across the small areas being mapped. However, since the age of Classical Greece, maps of large regions, and especially of the world, have used projection from a model globe to control how the inevitable distortion gets apportioned on the map.
Modern methods of transportation, the use of surveillance aircraft, and more recently the availability of satellite imagery have made documentation of many areas possible that were previously inaccessible. Free online services such as Google Earth have made accurate maps of the world more accessible than ever before.
Etymology
The English term cartography is modern, borrowed from the French cartographie in the 1840s, itself based on Middle Latin carta "map".Pre-modern era
Earliest known maps
It is not always clear whether an ancient artifact had been wrought as a map or as something else. The definition of "map" is also not precise. Thus, no single artifact is generally accepted to be the earliest surviving map. Candidates include:- A map-like representation of a mountain, river, valleys and routes around Pavlov in the Czech Republic, carved on a mammoth tusk, that has been dated to 25,000 BC.
- An Aboriginal Australian cylcon that may be as much as 20,000 years old that is thought to depict the Darling River.
- A map etched on a mammoth bone at Mezhyrich that is about 15,000 years old.
- Dots dating to 14,500 BC found on the walls of the Lascaux caves map of part of the night sky, including the three bright stars Vega, Deneb, and Altair, as well as the Pleiades star cluster. The Cuevas de El Castillo in Spain that contains a dot map of the Corona Borealis constellation dating from 12,000 BC.
- A polished chunk of sandstone from a cave in Spanish Navarre, dated to 14,000 BC, that may be symbols for landscape features, such as hills or dwellings, superimposed on animal etchings. Alternatively, it may also represent a spiritual landscape, or simple incisings.
- The Ségognole 3 rock shelter in the Paris Basin of France contains what is speculated to be a miniature representation of the surrounding landscape, modelled to reflect natural water flows and geomorphological features of the region. It may be the oldest three-dimensional map, and dates back 13,000 years ago, around 12,000 to 11,000 BC.
- Another ancient picture that resembles a map that was created in the late 7th millennium BC in Çatalhöyük, Anatolia, modern Turkey. This wall painting may represent a plan of this Neolithic village; however, recent scholarship has questioned the identification of this painting as a map.
- The "Saint-Bélec slab", whose lines and symbols have been argued to represent a cadastral plan of a part of western Brittany.
Ancient Near East
The Babylonian World Map, the earliest surviving map of the world, is a symbolic, not a literal representation. It deliberately omits peoples such as the Persians and Egyptians, who were well known to the Babylonians. The area shown is depicted as a circular shape surrounded by water, which fits the religious image of the world in which the Babylonians believed.
Phoenician sailors made major advances in seafaring and exploration. It is recorded that the first circumnavigation of Africa was possibly undertaken by Phoenician explorers employed by Egyptian pharaoh Necho II c. 610–595 BC. In The Histories, written 431–425 BC, Herodotus cast doubt on a report of the Sun observed shining from the north. He stated that the phenomenon was observed by Phoenician explorers during their circumnavigation of Africa who claimed to have had the Sun on their right when circumnavigating in a clockwise direction. To modern historians, these details confirm the truth of the Phoenicians' report, and even suggest the possibility that the Phoenicians knew about the spherical Earth model. However, nothing certain about their knowledge of geography and navigation has survived. The historian Dmitri Panchenko theorizes that it was the Phoenician circumnavigation of Africa that inspired the theory of a spherical Earth by the 5th century BC.
Ancient Greece
Many scholars throughout history, such as Strabo, Kish, and Dilke, consider Homer to be the founder of the early Greek conception of Earth, and therefore of geography. Homer conceived Earth to be a disk surrounded by a constantly moving stream of Ocean, an idea which would be suggested by the appearance of the horizon as it is seen from a mountaintop or from a seacoast. This model was accepted by the early Greeks. Homer and his Greek contemporaries knew very little of the Earth beyond the Libyan desert of Egypt, the southwest coast of Asia Minor, and the northern boundary of the Greek homeland. Furthermore, the coast of the Black Sea was only known through myths and legends that circulated during his time. In his poems there is no mention of Europe and Asia as geographical concepts. That is why the big part of Homer's world that is portrayed on this interpretive map represents lands that border on the Aegean Sea. The Greeks believed that they occupied the central region of Earth and its edges were inhabited by savage, monstrous barbarians and strange animals and monsters: Homer's Odyssey mentions a great many of these.Additional statements about ancient geography are found in Hesiod's poems, probably written during the 8th century BC. Through the lyrics of Works and Days and Theogony, he shows to his contemporaries some definite geographical knowledge. He introduces the names of such rivers as Nile, Ister, the shores of the Bosporus and the Euxine, the coast of Gaul, the island of Sicily, and a few other regions and rivers. His advanced geographical knowledge not only had predated Greek colonial expansions, but also was used in the earliest Greek world maps, produced by Greek mapmakers such as Anaximander and Hecataeus of Miletus, and Ptolemy using both observations by explorers and a mathematical approach.
Early steps in the development of intellectual thought in ancient Greece belonged to Ionians from their well-known city of Miletus in Asia Minor. Miletus was placed favourably to absorb aspects of Babylonian knowledge and to profit from the expanding commerce of the Mediterranean. The earliest ancient Greek who is said to have constructed a map of the world is Anaximander of Miletus, pupil of Thales. He believed that the Earth was a cylindrical form, a stone pillar suspended in space. The inhabited part of his world was circular, disk-shaped, and presumably located on the upper surface of the cylinder.
For constructing his world map, Anaximander is considered by many to be the first mapmaker. Little is known about the map, which has not survived. Hekatæus of Miletus produced another map fifty years later that he claimed was an improved version of the map of his illustrious predecessor.
Hecatæus's map describes the Earth as disk with an encircling Ocean, and with Greece placed in the center. This was a very popular contemporary Greek worldview, derived originally from the Homeric poems. Also, similar to many other early maps in antiquity, his map has no scale. As units of measurements, this map used "days of sailing" on the sea and "days of marching" on dry land. The purpose of this map was to accompany Hecatæus's geographical work that was called Periodos Ges, or Journey Round the World. Periodos Ges was divided into two books, "Europe" and "Asia", with the latter including Libya, the name of which was an ancient term for all of known Africa.
The work divides the world into two continents, Asia and Europe. Hecatæus depicts the line between the Pillars of Hercules through the Bosporus, and the Don River as a boundary between the two. He was the first writer known to have thought that the Caspian flows into the encircling ocean—an idea that persisted long into the Hellenic period. He was particularly instructive about the Black Sea, adding many geographic places that already were known to Greeks through the colonization process. To the north of the Danube, according to Hecatæus, were the Rhipæan Mountains, beyond which lived the Hyperboreans—peoples of the far north. Hecatæus depicted the origin of the Nile River at the southern encircling ocean. This assumption helped Hecatæus propose a solution to the mystery of the annual flooding of the Nile. He believed that the waves of the ocean were a primary cause of this occurrence. A map based on Hecataeus's was intended to aid political decision-making. According to Herodotus, that map was engraved into a bronze tablet and was carried to Sparta by Aristagoras during the revolt of the Ionian cities against Persian rule from 499 to 494 BC.
Anaximenes of Miletus, who studied under Anaximander, rejected the views of his teacher regarding the shape of the Earth and instead, he visualized the Earth as a rectangular form supported by compressed air.
Pythagoras of Samos speculated about the notion of a spherical Earth with a central fire at its core. He is sometimes incorrectly credited with the introduction of a model that divides a spherical Earth into five zones: one hot, two temperate, and two cold—northern and southern. This idea, known as the zonal theory of climate, is more likely to have originated at the time of Aristotle.
Scylax, a sailor, made a record of his Mediterranean voyages in BC. This is the earliest known set of Greek periploi, or sailing instructions, which became the basis for many future mapmakers, especially in the medieval period.
The way in which the geographical knowledge of the Greeks advanced from the previous assumptions of the Earth's shape was through Herodotus and his conceptual view of the world. This map also did not survive and many have speculated that it was never produced. A possible reconstruction of his map is displayed adjacent.
Herodotus traveled extensively, collecting information and documenting his findings in his books on Europe, Asia, and Libya. He also combined his knowledge with what he learned from the people he met. Herodotus wrote his Histories in the mid-5th century BC. Although his work was dedicated to the story of long struggle of the Greeks with the Persian Empire, Herodotus also included everything he knew about the geography, history, and peoples of the world. Thus, his work provides a detailed picture of the known world of the 5th century BC.
Herodotus rejected the prevailing view of most 5th-century BC maps that the Earth is a disk surrounded by ocean. In his work he describes the Earth as an irregular shape with oceans surrounding only Asia and Africa. He introduces names such as the Atlantic Sea, and the Erythrean Sea, which translates as the "Red Sea". He also divided the world into three continents: Europe, Asia, and Africa. He depicted the boundary of Europe as the line from the Pillars of Hercules through the Bosphorus and the area between the Caspian Sea and the Indus River. He regarded the Nile as the boundary between Asia and Africa. He speculated that the extent of Europe was much greater than was assumed at the time and left Europe's shape to be determined by future research.
In the case of Africa, he believed that, except for the small stretch of land in the vicinity of Suez, the continent was in fact surrounded by water. However, he definitely disagreed with his predecessors and contemporaries about its presumed circular shape. He based his theory on the story of Pharaoh Necho II, the ruler of Egypt between 609 and 594 BC, who had sent Phoenicians to circumnavigate Africa. Apparently, it took them three years, but they certainly did prove his idea. He speculated that the Nile River started as far west as the Ister River in Europe and cut Africa through the middle. He was the first writer to assume that the Caspian Sea was separated from other seas and he recognised northern Scythia as one of the coldest inhabited lands in the world.
Similar to his predecessors, Herodotus also made mistakes. He accepted a clear distinction between the civilized Greeks in the center of the Earth and the barbarians on the world's edges. In his Histories it is clear that he believed that the world became stranger and stranger when one traveled away from Greece, until one reached the ends of the Earth, where humans behaved as savages.
While various previous Greek philosophers presumed the Earth to be spherical, Aristotle is credited with proving the Earth's sphericity. His arguments may be summarized as follows:
- The lunar eclipse is always circular
- Ships seem to sink as they move away from view and pass the horizon
- Some stars can be seen only from certain parts of the Earth.