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Sundial: History & Applications

A sundial is a horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate (the dial) and a gnomon, which casts a shadow onto the dial. As the Sun appears to move through the sky, the…

Language: English [EN]
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Sundial topic overview

The analysis highlights History and Applications as prominent areas in the source structure around Sundial.

Related topics
164
Source areas
18
Connected nodes
182
Extracted relationships
343
Concept neighborhoods
51
Bridge connections
182

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

With fixed axial gnomon · 19 topics
Unusual sundials · 18 topics
Adjustments to calculate clock time from a sundial reading · 17 topics
Overview · 17 topics
History · 16 topics
Apparent motion of the Sun · 14 topics
Introduction · 14 topics
In the Southern Hemisphere · 8 topics
Meridian lines · 8 topics
Altitude-based sundials · 7 topics
Multiple dials · 6 topics
Movable-gnomon sundials · 5 topics
Nodus-based sundials · 5 topics
Use as a compass · 5 topics
Functioning · 2 topics
Historical · 1 topics
National organisations · 1 topics
Sundial mottoes · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Introduction

Apparent motion of the Sun

History

Functioning

In the Southern Hemisphere

Adjustments to calculate clock time from a sundial reading

With fixed axial gnomon

Movable-gnomon sundials

Altitude-based sundials

Nodus-based sundials

Multiple dials

Unusual sundials

Meridian lines

Sundial mottoes

Use as a compass

National organisations

Historical

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Sundial connects Entity context

The extracted context around Sundial shows recurring relationship patterns in the source. For example, Sundial → AARS, Asociación Amigos, British Sundial SocietyCommission, BSS, Cadrans Solaires, Catalan Sundial SocietyDe Zonnewijzerkring, Catalana, CGI, Dutch Sundial Society, English, Flemish Sundial Society, France French Sundial SocietyCoordinamento, Gnomonico Italiano Archived, Gnomònica, Italian Sundial SocietyNorth American, NASS, North American Sundial SocietySocietat, Relojes, Society, Société Astronomique Another extracted example is Sundial → Analemmatic, Ancient Technologies, Arabic, Archaeoastronomy, Bronze Age, Calculation, Construction, Deficiencies, Egyptian, Horizontal Sundials, Inclined Sundials, It, Maridini, Northern Black Sea Coast, Remedies, Setting Up Marble Sundials, Sibt, Small Treatise, Tables, The Book. Use these groups to spot repeated connection types before inspecting the individual relationships.

Sundial

Top relations

related to National organisations · 25
Sundial → AARS, Asociación Amigos, British Sundial SocietyCommission, BSS, Cadrans Solaires, Catalan Sundial SocietyDe Zonnewijzerkring, Catalana, CGI, Dutch Sundial Society, English, Flemish Sundial Society, France French Sundial SocietyCoordinamento, Gnomonico Italiano Archived, Gnomònica, Italian Sundial SocietyNorth American, NASS, North American Sundial SocietySocietat, Relojes, Society, Société Astronomique
related to Historical · 21
Sundial → Analemmatic, Ancient Technologies, Arabic, Archaeoastronomy, Bronze Age, Calculation, Construction, Deficiencies, Egyptian, Horizontal Sundials, Inclined Sundials, It, Maridini, Northern Black Sea Coast, Remedies, Setting Up Marble Sundials, Sibt, Small Treatise, Tables, The Book
related to history · 19
Sundial → Athens, Babylonian, BC, BCE, By, De, Egyptian, Eratosthenes, Giovanni Padovani, Giuseppe Biancani's Constructio, Kush, Ptolemy, The, The Italian, The Roman, The Tower, They, Vitruvius, Winds
related to With fixed axial gnomon · 16
Sundial → California, Earth's, For, However, If, Jaipur, Lambert, North Pole, On, Polaris, Redding, Sun, Sundial Bridge, The, This, Turtle Bay
related to In the Southern Hemisphere · 15
Sundial → Australia, Correspondingly, For, North, Northern Hemisphere, On, Perth, Scotland, See, South, Southern Hemisphere, Sundials, The, To, US
related to Universal equinoctial ring dial · 13
Sundial → As, Earth's, Europe, Gemma's, In, It, Such, Sun, Sun's, The, These, This, William Oughtred
related to Equation of time correction · 12
Sundial → Although, Earth, Earth's, For, However, In, It, On, Sun, The, Therefore, This
see also · 12
Sundial → BianchiniHorologyJantar MantarLahaina NoonMoondialNocturnal, Butterfield, GnomònicaTide, Johannes Hevelius, Palace Sundial, Qibla, Scotland, Scottish, Shadows, Societat Catalana, Water, Zero
related to Time-zone (longitude) correction · 11
Sundial → Alaska, At, China, Earth, For, However, If, Lambert, Spain, Sun, This
related to Apparent motion of the Sun · 10
Sundial → An, Earth, Northern Hemisphere, Since, Sun, Sun's, The, The Earth, The Sun's, Unlike

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

time dial gnomon sundials vertical shadow horizontal dials latitude sun style hour angle may north aligned plane axis equatorial used

Sundial relationships Subject–Predicate–Object triples

TTTA extracted 343 structured relationships around Sundial. Examples in this analysis include Sundial → is a → horological device that tells the time of day and Sundial → is a → mast of the Sundial Bridge at Turtle Bay in Redding. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Sundialis ahorological device that tells the time of day0.90text
Sundialis amast of the Sundial Bridge at Turtle Bay in Redding0.90text
obelisksinstance ofand vertical gnomons0.80text
the analemmatic sundialinstance ofin some designs0.80text
the style is moved according to the monthinstance ofin some designs0.80text
equatorialinstance ofFor equiangular dials0.80text
spherical or Lambert dialsinstance ofFor equiangular dials0.80text
this correction can be made by rotating the dial surface by an angle equaling the difference in longitudeinstance ofFor equiangular dials0.80text
without changing the gnomon position or orientationinstance ofFor equiangular dials0.80text
the Capuchin dialinstance ofIn more sophisticated versions0.80text
there is only one set of hour-linesinstance ofIn more sophisticated versions0.80text
i.e.instance ofIn more sophisticated versions0.80text

Related concept clusters Concept neighborhoods

The concept neighborhoods around Sundial bring nearby vocabulary together. In this analysis, examples include Horizontal, Time and Vertical. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Sundial
    • Horizontal
    • Time
    • Vertical
    • Style
    • Clock
    • Dial
    • Equatorial
    • North
    • Hour
    • Gnomon
    • Sundials
    • Equation
  • sundial
    • Horizontal
    • Time
    • Vertical
    • Style
    • Clock
    • Dial
    • Equatorial
    • North
    • Hour
    • Gnomon
    • Sundials
    • Equation
  • day
    • Time
    • Year
    • Sun
    • Clock
    • Hours
    • Equation
    • Must
    • Hour
    • Gnomon
    • Sundials
    • Face
    • Vertical
  • sun
    • Hours
    • Axis
    • Equatorial
    • Shadow
    • Plane
    • Gnomon
    • Time
    • Declination
    • Vertical
    • Hour
    • Dial
    • Year
  • gnomon
    • Aligned
    • Shadow
    • Plate
    • Vertical
    • Sundial
    • Sundials
    • May
    • Horizontal
    • Equatorial
    • Axis
    • Angle
    • Style
  • shadow
    • Equatorial
    • Surface
    • Plane
    • Hour-lines
    • Style
    • Time
    • Light
    • Aligned
    • Sundial
    • Sundials
    • Face
    • Sun
  • parallel to the axis
    • Earth's
    • Aligned
    • Style
    • True
    • North
    • Latitude
    • Angle
    • Sun
    • Plane
    • Gnomon
    • Horizontal
    • Equatorial
  • earth's rotation
    • Aligned
    • Style
    • True
    • North
    • Latitude
    • Angle
    • Plane
    • Horizontal
    • Must
    • Hour-lines
    • Gnomon
    • Equatorial

Connections between topic areas Semantic bridges

For Sundial, one of the stronger structural bridges in this analysis connects Sundial with With fixed axial gnomon. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
SundialWith fixed axial gnomon · splits 163 ⟂ 20
SundialUnusual sundials · splits 164 ⟂ 19
SundialOverview · splits 165 ⟂ 18
SundialAdjustments to calculate clock time from a sundial reading · splits 165 ⟂ 18
SundialHistory · splits 166 ⟂ 17
SundialIntroduction · splits 168 ⟂ 15
SundialApparent motion of the Sun · splits 168 ⟂ 15
SundialIn the Southern Hemisphere · splits 174 ⟂ 9
SundialMeridian lines · splits 174 ⟂ 9
SundialAltitude-based sundials · splits 175 ⟂ 8
SundialMultiple dials · splits 176 ⟂ 7
SundialMovable-gnomon sundials · splits 177 ⟂ 6
SundialNodus-based sundials · splits 177 ⟂ 6
SundialUse as a compass · splits 177 ⟂ 6
SundialFunctioning · splits 180 ⟂ 3

Map overview Semantic statistics

Sundial

Nodes183
Edges182
Triples343
Avg. degree1.99
Density0.010929
Components1

Source & methodology

TTTA analyzes the structure around Sundial to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History & Applications, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Sundial · EN edition · Analysis: TopicsToTalkAbout

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