EigoPro 1級 読解 — Lines of Power: A Brief History of Cartography

No map has ever been a transparent window onto an unmediated reality. To draw the world is, inescapably, to argue about it: to decide what counts as significant, what may be omitted, and from whose vantage the whole shall be surveyed. The history of cartography is therefore less a chronicle of mounting accuracy than a sequence of competing fictions, each persuasive in its own century. What changes is not the presence of distortion but its character, for every age inscribes its own preoccupations onto the contours of the earth. Consider the mediaeval mappae mundi, those luminous discs that placed Jerusalem at the centre of creation. To dismiss them as cartographically incompetent is to misread their purpose entirely. They were devotional diagrams, conceived to orient the soul toward sacred history rather than to guide the body across terrain; measurement was beside the point when the point was salvation. The Renaissance, by contrast, married geometry to commerce. Gerardus Mercator's celebrated projection of 1569 allowed sailors to chart a course as a single straight line of constant compass bearing—an extraordinary navigational convenience purchased at a price. By stretching the meridians to keep those bearings true, the projection grossly inflated the apparent size of high-latitude regions, so that Greenland came to rival Africa though it is a fraction of its size. Honesty about area was sacrificed for ease of passage, and the lie went unnoticed precisely because it was so useful. If the Renaissance map served the merchant, the imperial map served the state. The great colonial surveys were frankly tendentious: by rendering populated interiors as blank space and labelling them terra nullius—nobody's land—they did not merely describe territory but manufactured the legal fiction by which it could be claimed. A cartographer's omissions, here, were as eloquent as any inscription. We flatter ourselves that the digital age has dissolved such partiality, that the satellite image and the routing application at last deliver the world unvarnished. Yet the bias has not vanished; it has merely migrated into the code. An algorithm decides which roads are foregrounded, which neighbourhoods recede, which businesses surface first—choices now hidden within proprietary systems no ordinary user can audit. The hand of the surveyor has been replaced by the opacity of the machine, and to trust a map remains, as it always was, an act of trust in its unseen maker.

5問合格 60%以上普通

新規登録 または ログイン が必要です

この単元の問題を3問、解説つきで公開しています

1級 · 読解 · 全5問

問 1

Which statement best captures the central argument of the passage?

  • Medieval mapmakers were primarily concerned with theology and therefore produced cartographically worthless documents.
  • The shift from manuscript to digital cartography has finally eliminated the distortions that once plagued the discipline.
  • Maps have never been neutral records of terrain but are rhetorical artefacts that encode the assumptions and ambitions of those who commission them.
  • The accuracy of maps has improved steadily over the centuries thanks to advances in surveying and printing technology.
Phrase

maps as rhetorical artefacts / never neutral

1級読解主旨把握論旨
⚡ひとことで

本文の核は地図が中立的記録ではなく製作者の前提と野心を刻み込んだ修辞的人工物だという点。

選択肢の解説Choice Analysis

「Maps have never been neutral records of terrain but are rhetorical artefacts that encode the assumptions and ambitions of those who commission them.」

正解

本文は冒頭から「地図が透明な窓であったことは一度もない (no map has ever been a transparent window)」と述べ、結びでもデジタル地図ですらアルゴリズムという新たな利害を埋め込むと主張する。つまり一貫して地図は中立な記録ではなく製作者の前提・野心を符号化する修辞的産物だと論じている。よってこの選択肢が論旨全体を最も的確に要約する。

  • 「The accuracy of maps has improved steadily over the centuries thanks to advances in surveying and printing technology.」

    = 技術進歩で精度が着実に向上した ━ 本文は精度の向上を主題とせず、むしろ各時代が独自の歪みを持つと述べるため論旨とずれる。

  • 「Medieval mapmakers were primarily concerned with theology and therefore produced cartographically worthless documents.」

    = 中世の地図は無価値だった ━ 本文は中世の地図を無価値とは断じず、別種の真実を表現したと評価しているため本文と矛盾。

  • 「The shift from manuscript to digital cartography has at last eliminated the systematic distortions that once plagued the discipline.」

    = デジタル化が歪みを根絶した ━ 本文は逆にデジタル地図が新たな利害を埋め込むと述べており明確に矛盾。

▦Collocation
パターン意味例
encode an assumption前提を符号化するEvery projection encodes an assumption about what matters.
transparent window透明な窓 (中立な媒体)A map is never a transparent window onto the world.
rhetorical artefact修辞的人工物Treat the chart as a rhetorical artefact, not a fact.
serve an agenda思惑に奉仕するBorders on the map served an imperial agenda.
lay claim to～の所有を主張するThe survey laid claim to contested land.
❝例文

  • No map has ever been a transparent window onto an unmediated reality.

    いかなる地図も、媒介を経ない現実への透明な窓であったことはない。

  • The cartographer's choices betray priorities as much as they record places.

    地図製作者の選択は、場所を記録する以上に優先順位を露呈させる。

  • What a map omits is often as eloquent as what it depicts.

    地図が省くものは、描くものと同じくらい雄弁であることが多い。

  • Power has always wished to see itself reflected in the contours of the world.

    権力は常に、世界の輪郭の中に自らの姿が映ることを望んできた。

💡Tip · 覚えるコツ

主旨設問では冒頭の主張文と結論段の呼応に注目する。本文のように「冒頭で否定形のテーゼ→各時代の例証→結論で現代へ拡張」という構造の場合、最終段が論旨を一般化して再提示することが多い。技術賛美や時代の優劣を語る選択肢は、評論の批判的トーンとずれることが多く除外候補となる。

問 2

According to the passage, why were the medieval mappae mundi structured around Jerusalem rather than geographic measurement?

  • Pilgrims demanded that the route to Jerusalem be exaggerated so that it dominated the page.
  • They were conceived as devotional diagrams meant to orient the soul toward sacred history rather than to guide physical travel.
  • Their makers lacked the surveying instruments needed to determine accurate distances between cities.
  • Church authorities forbade the depiction of coastlines on theological grounds.
Phrase

mappae mundi / devotional diagram / orient the soul

1級読解詳細中世地図
⚡ひとことで

中世の世界図はエルサレムを中心に据えた魂を聖史へ向ける信仰の図式だった。

選択肢の解説Choice Analysis

「They were conceived as devotional diagrams meant to orient the soul toward sacred history rather than to guide physical travel.」

正解

本文は mappae mundi が「測量の道具ではなく信仰の図式 (devotional diagrams)」であり、エルサレムを中心に置くことで観者の魂を聖なる歴史へ方向づけたと明記する。物理的移動の案内ではなく精神的方向づけが目的だったと述べているため、この選択肢が本文の説明と一致する。

  • 「Their makers simply lacked the surveying instruments needed to determine accurate distances between distant cities.」

    = 測量器具が無かったから ━ 本文は器具の欠如ではなく目的の違い(信仰)を理由に挙げているので不十分。

  • 「Pilgrims demanded that the route to Jerusalem be exaggerated so that it dominated the page.」

    = 巡礼者が誇張を要求した ━ 本文に巡礼者の要求への言及はなく、もっともらしいが無関係。

  • 「Church authorities forbade the depiction of coastlines on theological grounds.」

    = 教会が海岸線を禁じた ━ そのような禁止は本文に存在せず捏造で矛盾。

▦Collocation
パターン意味例
orient toward～へ方向づけるThe diagram orients the viewer toward salvation.
devotional diagram信仰の図式It was a devotional diagram, not a road map.
place at the centre中心に据えるJerusalem was placed at the centre of the world.
sacred history聖なる歴史The map narrated sacred history in space.
guide physical travel物理的移動を案内するThese charts were never meant to guide physical travel.
❝例文

  • The mappa mundi was a sermon in pigment rather than a guide to the road.

    世界図は道の案内というより顔料で描かれた説教であった。

  • Centring Jerusalem signalled a spiritual, not a spatial, priority.

    エルサレムを中心に置くことは空間的でなく霊的な優先を示した。

  • To read such a map was to rehearse a moral geography.

    そのような地図を読むことは道徳的地理を反芻することだった。

  • Measurement was beside the point when the point was devotion.

    要点が信仰である以上、測量は的外れであった。

💡Tip · 覚えるコツ

詳細設問では「理由 (why)」を問う場合、本文の因果接続詞や言い換え (because, for, in order to) の周辺を精査する。器具の欠如のような技術論にすり替える誤答は、本文が目的・意図を理由に挙げているときに典型的なひっかけとなる。

問 3

What does the passage identify as the significance of the Mercator projection?

  • It deliberately shrank European territories to flatter the colonies that commissioned it.
  • It privileged navigational convenience by preserving compass bearings, but at the cost of grossly inflating the apparent size of high-latitude regions.
  • It was rejected by sailors because the straight rhumb lines made ocean routes harder to plot.
  • It was the first projection to render the spherical earth on a flat surface without any distortion whatsoever.
Phrase

Mercator / compass bearings / inflated high latitudes

1級読解詳細図法
⚡ひとことで

メルカトル図法は羅針盤の方位を保つ代償に高緯度を肥大化させた。

選択肢の解説Choice Analysis

「It privileged navigational convenience by preserving compass bearings, but at the cost of grossly inflating the apparent size of high-latitude regions.」

正解

本文はメルカトル図法が一定の羅針盤方位 (constant compass bearings) を直線で表せる航海上の利点を持つ一方、高緯度の陸塊を不釣り合いに拡大すると述べる。利便性と歪みのトレードオフを明示しているため、この選択肢が本文と合致する。

  • 「It was the very first projection to render the spherical earth upon a flat surface without introducing any distortion whatsoever.」

    = 歪みが全く無い最初の図法 ━ 球面を平面化すれば歪みは不可避と本文の論調に反し矛盾。

  • 「It was rejected by sailors because the straight rhumb lines made ocean routes harder to plot.」

    = 航海者に拒否された ━ 本文は航海に有用だったとするため逆で矛盾。

  • 「It deliberately shrank European territories to flatter the colonies that commissioned it.」

    = 欧州を縮小し植民地に媚びた ━ 本文は高緯度=欧州側が拡大されたと述べるため事実が逆。

▦Collocation
パターン意味例
preserve bearings方位を保つMercator preserves constant compass bearings.
at the cost of～を犠牲にしてConvenience came at the cost of accuracy.
inflate the size大きさを誇張するThe projection inflates the size of Greenland.
high-latitude regions高緯度地域High-latitude regions appear vastly enlarged.
plot a route航路を引くSailors could plot a straight route with ease.
❝例文

  • Mercator turned a curved problem into a straight

    line solution for sailors. — メルカトルは曲面の難題を航海者向けの直線解へ変えた。

  • Greenland swells to rival Africa, though it is a fraction of its size.

    グリーンランドは実際はごく小さいのにアフリカに匹敵するほど膨らむ。

  • The trade

    off was geometric honesty for navigational ease. — その取引は幾何学的誠実さと引き換えの航海上の容易さだった。

  • Every flat map must lie somewhere; Mercator lies about the poles.

    あらゆる平面地図はどこかで嘘をつく。メルカトルは極で嘘をつく。

💡Tip · 覚えるコツ

詳細設問では「利点と代償」が対句で語られる箇所を狙う。'but', 'at the cost of', 'while' などの逆接周辺に正解根拠が集中する。『全く歪みがない』『拒否された』など極端な断定の誤答は、トレードオフを論じる本文では真っ先に消せる。

残り2問は、解いて確かめられます

全5問すべてに、この形式の解説が付いています。 間違えた問題は記録され、あとから復習できます。

無料で登録して続きを解く

インストール不要・カード登録なし・いま全機能無料

この単元の講義を見る1級の単元一覧1級の用語集