Passage 1: Mapping the World: A History of Cartography
ALong before any coastline had been accurately measured, early societies were already attempting to record the shape of their surroundings. The oldest surviving map of the known world is a small clay tablet from Babylon, dated to roughly the sixth century BC, which shows the city at the centre of a circular disc surrounded by a ring of water, with a handful of named regions arranged around it. Ancient Egyptian surveyors, meanwhile, produced far more practical documents: strips of land recorded for taxation purposes after the annual flooding of the Nile redrew field boundaries each year. Neither tradition aimed at geographic accuracy in the modern sense; the Babylonian tablet was as much a statement of cosmology as of geography, while Egyptian land records served an administrative rather than an exploratory purpose. It would be several centuries before mapmaking began to separate itself clearly from myth and taxation alike.
BThat separation owes a great deal to the Alexandrian scholar Claudius Ptolemy, whose eight-volume work Geographia, compiled in the second century AD, set out a system of latitude and longitude that allowed any location to be plotted by coordinate rather than by verbal description alone. Ptolemy compiled data from earlier travellers and traders, cross-referencing distances reported along trade routes, and the resulting maps, though never physically surveyed, mark the first serious attempt to render the inhabited world to a consistent mathematical scale. Ptolemy's estimate of the Earth's total circumference, however, was substantially too small, an error that survived largely unchallenged in Europe for over a thousand years. When Christopher Columbus later relied on a figure derived from Ptolemy's underestimate to calculate the distance westward to Asia, he badly misjudged the size of the ocean he was crossing, a miscalculation historians now credit with strengthening his resolve to sail regardless of the risk.
CFor much of the medieval period, European mapmaking drifted away from Ptolemy's mathematical ambitions. The mappae mundi produced by monastic scribes were organised around theological rather than geographical logic, typically placing Jerusalem at the centre of the page and arranging the three known continents in a stylised T-shape within an encircling O of ocean. These documents, of which the Hereford Mappa Mundi is the largest surviving example, were never intended as practical navigational aids; they functioned instead as visual encyclopaedias, crowded with biblical scenes, mythical creatures and moral lessons alongside geographic features. Sailors of the period, faced with genuinely hazardous coastal waters, relied on entirely different and far more functional documents.
DThose functional documents were portolan charts, which emerged in Mediterranean ports from the thirteenth century onward. Drawn directly from compass bearings and estimated sailing distances rather than from any mathematical projection, portolan charts crisscrossed the sea with the straight rhumb lines from which sailors could plot a compass course between ports, and their coastal outlines were often startlingly accurate for instruments produced without formal survey. The single most influential advance in navigational mapmaking, though, came in 1569, when the Flemish geographer Gerardus Mercator published a projection that preserved compass bearings as straight lines across the entire map, at the cost of dramatically exaggerating the size of landmasses near the poles. Sailors adopted the Mercator projection almost immediately because it let them plot a straight-line course with a ruler; the distortion this convenience introduced, inflating Greenland to appear larger than Africa despite being roughly one-fourteenth its actual size, would later become a familiar point of criticism among geographers.
ENational governments took a further step toward accuracy in the eighteenth century by adopting triangulation, a technique that calculates unknown distances from a single measured baseline and a network of angles observed between fixed points. Britain's Ordnance Survey, established in 1791 initially to map the south coast against the threat of French invasion, extended this method across the entire country over the following decades, producing maps of a precision no earlier civilian survey had approached. The project's name preserves its military origin: the Board of Ordnance was the government department responsible for supplying the army, and the survey was originally a defence measure rather than a public convenience. Comparable national surveys followed across Europe, each replacing older, looser sketches with maps anchored to precisely measured trigonometric points.
FThe twentieth century brought two further transformations. Aerial photography, developed during the First World War for reconnaissance, allowed cartographers to verify ground features from directly overhead rather than relying solely on surveyors walking the land, and by mid-century it had become the standard method for updating national map series. Satellite imagery and the Global Positioning System, operational for civilian use from the 1990s, then compressed the whole process further, allowing a location to be fixed to within a few metres almost anywhere on Earth within seconds. The most recent shift has been driven not by better instruments but by participation: platforms such as OpenStreetMap now rely on volunteers to record and correct map data collaboratively, a crowd-sourced model that would have been unimaginable to the monastic scribes who once copied mappae mundi by hand, yet one that ultimately serves the same basic purpose those scribes served: helping people understand where they stand in relation to the wider world.
- rhumb line:
- a line on a map crossing all meridians at the same angle, used to plot a constant compass course
- triangulation:
- a surveying technique that calculates unknown distances from a measured baseline and a network of observed angles
أسئلة النص 1
Do the following statements agree with the information given in Reading Passage 1? Write TRUE if the statement agrees with the information, FALSE if the statement contradicts the information, NOT GIVEN if there is no information on this.
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1The Babylonian clay tablet places the city of Babylon at the edge of the circular map.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
FALSE
"'shows the city at the centre of a circular disc surrounded by a ring of water' (Paragraph A)"
ليش صحيح: النص يذكر أن بابل في المركز لا الحافة.. تناقض مباشر في الموقع.
ليش الباقي خطأ: ليست TRUE بسبب التناقض الصريح، وليست NOT GIVEN لأن الموقع مذكور بوضوح.
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2Egyptian land records were updated annually because Nile flooding altered field boundaries.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
TRUE
"'strips of land recorded for taxation purposes after the annual flooding of the Nile redrew field boundaries each year' (Paragraph A)"
ليش صحيح: إعادة صياغة مباشرة لحقيقة مؤكدة في النص.
ليش الباقي خطأ: ليست FALSE لعدم وجود تناقض، وليست NOT GIVEN لأن السبب مذكور صراحة.
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3Ptolemy personally travelled to every location recorded in his Geographia.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
FALSE
"'the resulting maps, though never physically surveyed' (Paragraph B)"
ليش صحيح: النص ينفي صراحة أي مسح ميداني فعلي، فتظهر العبارة متناقضة معه.
ليش الباقي خطأ: ليست TRUE بسبب النفي الصريح، وليست NOT GIVEN لأن النص يوضح الأمر بوضوح.
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4Columbus's miscalculation of the distance to Asia was based partly on Ptolemy's circumference estimate.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
TRUE
"'Columbus later relied on a figure derived from Ptolemy's underestimate to calculate the distance westward to Asia' (Paragraph B)"
ليش صحيح: إعادة صياغة مباشرة للرابط المذكور في النص.
ليش الباقي خطأ: ليست FALSE لعدم وجود تناقض، وليست NOT GIVEN لأن الرابط مذكور صراحة.
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5The scribe who created the Hereford Mappa Mundi had personally travelled to Jerusalem.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
NOT GIVEN
"'the Hereford Mappa Mundi is the largest surviving example' (Paragraph C)"
ليش صحيح: النص يذكر الخريطة كمثال لكنه لا يذكر أبدًا سفر صانعها إلى القدس.
ليش الباقي خطأ: ليست TRUE لعدم وجود تأكيد، وليست FALSE لعدم وجود نفي صريح.
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6The Ordnance Survey was created purely for civilian purposes, unconnected to any military concern.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
FALSE
"'established in 1791 initially to map the south coast against the threat of French invasion... originally a defence measure rather than a public convenience' (Paragraph E)"
ليش صحيح: النص يذكر أصلًا عسكريًا واضحًا، عكس ما تدّعيه العبارة.
ليش الباقي خطأ: ليست TRUE بسبب التناقض الصريح، وليست NOT GIVEN لأن الأصل العسكري مذكور بوضوح.
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7Volunteers contributing to OpenStreetMap must complete formal cartographic training before editing the platform.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
NOT GIVEN
"'platforms such as OpenStreetMap now rely on volunteers to record and correct map data collaboratively' (Paragraph F)"
ليش صحيح: النص يذكر مشاركة المتطوعين لكنه لا يذكر أي شرط تدريب رسمي.
ليش الباقي خطأ: ليست TRUE لعدم وجود تأكيد، وليست FALSE لعدم وجود نفي صريح.
Complete the notes below. Choose ONE WORD ONLY from the passage for each answer.
Ancient Babylon: clay tablet map centred on the city, surrounded by a ring of (8) ________
Ptolemy's Geographia: a system of (9) ________ and longitude for plotting locations
Medieval Europe: mappae mundi arranged in a stylised (10) ________ shape, centred on Jerusalem
1569: the Mercator projection preserves compass bearings as (11) ________ lines
1791: the Ordnance Survey established to map the coast against the threat of (12) ________ invasion
1990s: GPS allows a location to be fixed to within a few (13) ________
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8Question 8
اعرض الإجابة
water
"'surrounded by a ring of water' (Paragraph A)"
ليش صحيح: الكلمة مأخوذة حرفيًا من النص.
ليش الباقي خطأ: أي كلمة أخرى غير مذكورة في هذا الموضع.
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9Question 9
اعرض الإجابة
latitude
"'set out a system of latitude and longitude' (Paragraph B)"
ليش صحيح: الكلمة الدقيقة المستخدمة لوصف نظام بطليموس.
ليش الباقي خطأ: كلمات أخرى غير مذكورة في هذا السياق.
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10Question 10
اعرض الإجابة
T
"'arranging the three known continents in a stylised T-shape' (Paragraph C)"
ليش صحيح: الحرف الدقيق المستخدم لوصف شكل الخريطة.
ليش الباقي خطأ: أي حرف آخر غير مذكور في هذا الموضع.
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11Question 11
اعرض الإجابة
straight
"'preserved compass bearings as straight lines across the entire map' (Paragraph D)"
ليش صحيح: الكلمة الدقيقة المستخدمة لوصف خطوط بروجكشن ميركاتور.
ليش الباقي خطأ: كلمات أخرى مثل curved تناقض النص مباشرة.
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12Question 12
اعرض الإجابة
French
"'against the threat of French invasion' (Paragraph E)"
ليش صحيح: الكلمة الدقيقة لمصدر التهديد المذكور.
ليش الباقي خطأ: أي جنسية أخرى غير مذكورة في النص.
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13Question 13
اعرض الإجابة
metres / meters
"'allowing a location to be fixed to within a few metres' (Paragraph F)"
ليش صحيح: الكلمة الدقيقة لوحدة القياس المذكورة.
ليش الباقي خطأ: وحدات أخرى مثل kilometres تناقض الدقة المذكورة في النص.