30 April 2020
Antarctica presents many unique challenges to cartographers: as the last continent to be explored, its vast landmass – half as big again as Europe – is largely inaccessible, covered by sheets of mostly featureless ice, and shrouded in perpetual darkness for half of the year.
In this 200th anniversary year of the first known sighting of the continent, this first of two articles gives a whistle-stop tour through maps held in the British Library that chart Antarctica’s gradual emergence from obscurity into light.
Stuck awkwardly at the bottom of the conventional world map, Antarctica is poorly served by many map projections, which distort it out of recognition. On occasion, its lack of military or geopolitical significance has provided a convenient excuse to leave it off the map entirely, as seen in the United Nations logo. Yet this image of the continent created by the Mercator projection does bear a surprising, if superficial, similarity to some of its earliest depictions, long before it was discovered.
Mercator projection. Image created by Strebe, taken from Wikimedia Commons
From ancient times it was believed that a southern continent must logically exist to counterbalance the weight of the known northern hemisphere. In a world map first published in 1570, Abraham Ortelius perpetuated this belief with a southern landmass depicted prominently, but drawn entirely from conjecture.
[Typus orbis terrarum], 1598. BL Maps C.2.d.7.
The continent eluded several voyages of exploration to the far south, so that over time it became untenable to maintain the tension between the boldness and extent of the coastline’s detail, and the uncertainty of the label, ‘Nondum Cognita’ [‘not yet known’]. On this circa 1690 imprint of a map originally published by Dutch mapmakers Hondius and Janssonius, a polar projection is adopted, focussing interest on the blank centre. Recent voyages had documented islands of ice trailing through the empty seas, and the appearance of these on the map indicate where the continent is not. The mapmakers made no attempt to delineate the area that is still labelled ‘Terra Australis Incognita’.
[Polus Antarcticus. H. Hondius excudit], . BL Maps * 88710.(2.)
James Cook was the first to circumnavigate the pole, during his second voyage (1772-75), but the continent itself eluded him. Two years after his return the chart below was published in a record of the voyage. It is updated with many new findings, and features ‘the Tracks of some of the most distinguished Navigators’, which now encircle and crowd the blank centre. The focus here is on what is known, rather than what is not, and the label seen on earlier maps, ‘Terra Incognita’, has been replaced by, ‘The Ice Sea’.
A Chart of the Southern Hemisphere, in A Voyage towards the South Pole..., 1777. BL 10025.f.20.
Fabian Bellingshausen, commander of the first Russian Antarctic expedition (1819-21), is regarded by many to have been the first to set eyes on the continent. A reproduction of his manuscript chart of January 1820 shows a patch of blue at the lower edge that marks the first tentative departure from blank space near the pole – and indicates a feature that would later be named the Fimbul Ice Shelf. The original manuscripts are preserved in the Archives of the Russian Hydrographic Office and were published in facsimile in 1963. During the Cold War some British and American commentators cast doubt on their interpretation, and on the Soviet claim that a Russian had first discovered the continent.
[A facsimile of the MS chart drawn by F. Bellingshausen...], 1963. BL Maps 1.c.57.
Only two days after Bellingshausen’s sighting of the ice shelf in January 1820, Edward Bransfield, an officer in the British Royal Navy, sighted the first land feature of the continent, now known to lie at the tip of the Antarctic Peninsula. The discovery appears on a map published in 1844 by the Society for the Diffusion of Useful Knowledge. A short red line accurately delineates a portion of the terrestrial coastline for the first time, and bounds a region now called the Trinity Peninsula (just below the tip of South America on the left of the image).
Circumjacent the South Pole, 1844. BL Maps 38.e.8.
In 1843 another officer of the British Royal Navy, James Clark Ross, completed his own voyage of scientific exploration to the Southern Ocean. Science undertaken by the expedition included the first magnetic survey of the Antarctic, and succeeded in inferring the location of the magnetic south pole. The results were published by the Royal Society in 1869. With its wandering lines of magnetic declination, this sheet constitutes one of the earliest examples of thematic mapping of the Antarctic.
Antarctic Magnetic Survey, Epoch 1840-1845, Declination, in Philosophical Transactions of the Royal Society, 1869, vol 158 part 2. BL L.R.292.
Global shipping routes traversed the Southern Ocean in the middle of the nineteenth century, giving rise to a market for navigational aids. This commercial chart, published by J.D. Potter in 1858, was designed ‘to facilitate the practice of Great Circle Sailing’ around the southern latitudes, and allowed merchant navigators to plot the shortest routes through the Southern Ocean without encountering sea ice.
A Chart of South Latitudes beyond 20 Degrees, to facilitate the practice of Great Circle Sailing, with ... Diagram for the determination of the Courses and Distances, 1858. BL Maps 88710.(6.)
By 1886 the shape of the continent as we now know it had started to emerge. This chart was published in The Scottish Geographical Magazine and shows a ‘Supposed outline of [the] Antarctic Continent’ - a reminder perhaps of the, ‘Terra Incognita’, of old. But the extent of what is now known is indicated in the coastal detail, complete with heights of land and depths of sea, given here in shades of orange and blue.
South Polar Chart, in The Scottish Geographical Magazine, vol 2 p 576, 1886. BL Ac.6182.
The next article will continue the tour, from the ‘Heroic Era’ of Antarctic exploration up to the present day...