File:Ευπαλίνειο όρυγμα - Tunnel of Eupalinus.jpg
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[edit]DescriptionΕυπαλίνειο όρυγμα - Tunnel of Eupalinus.jpg |
Ελληνικά: Το Ευπαλίνειο όρυγμα είναι μια σήραγγα μήκους 1036 μέτρων κοντά στο Πυθαγόρειο της Σάμου, η οποία κατασκευάστηκε κατά τον 6ο αιώνα π.Χ. για να χρησιμεύσει σαν υδραγωγείο. Το ιδιαίτερο χαρακτηριστικό του ήταν ότι ανοίχθηκε ταυτόχρονα και από τις δυο πλευρές του βουνού: το όρυγμα αυτό ήταν αμφίστομον όπως το χαρακτήρισε ο Ηρόδοτος, χάρις στον οποίον έγινε γνωστό. Οι δυο σήραγγες συναντήθηκαν περίπου στο μέσον με αξιοθαύμαστη ακρίβεια, κάτι που ήταν σημαντικό επίτευγμα για τα τεχνολογικά δεδομένα της εποχής.
Η κατασκευή του ορύγματος έγινε με εντολή του τυράννου Πολυκράτη και εκτιμάται ότι η κατασκευή του κράτησε 10 χρόνια. Ο σχεδιαστής και μηχανικός του έργου ήταν ο Ευπαλίνος, γιος του Ναυστρόφου από τα Μέγαρα. Το άνοιγμα της σήραγγας είναι περίπου 1.80x1.80 μ. και το μήκος της 1036 μέτρα. Μερικά μέτρα κάτω από την κύρια σήραγγα έχει σκαφτεί μια μικρότερη, από την οποία περνούσε το νερό.
English: The Tunnel of Eupalinos or Eupalinian aqueduct (Modern Greek: Efpalinio orygma, Ευπαλίνειο όρυγμα) is a tunnel of 1,036 m (3,399 ft) length in Samos, Greece, built in the 6th century BC to serve as an aqueduct.[1] The tunnel is the second known tunnel in history which was excavated from both ends (Ancient Greek: αμφίστομον, amphistomon, "having two openings"), and the first with a geometry-based approach in doing so.
In the sixth century BC, Samos was ruled by the famous tyrant Polycrates.[1] During his reign, two groups working under the direction of the engineer Eupalinos from Megara dug a tunnel through Mount Kastro to build an aqueduct to supply the ancient capital of Samos (today called Pythagoreion) with fresh water. |
Date | |
Source | Own work |
Author | GrigorisKoulouriotis |
Camera location | 37° 41′ 42″ N, 26° 55′ 51.6″ E | View this and other nearby images on: OpenStreetMap | 37.695000; 26.931000 |
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current | 13:07, 23 August 2017 | 4,016 × 6,016 (17.72 MB) | GrigorisKoulouriotis (talk | contribs) | User created page with UploadWizard |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D600 |
Author | Eric Kaplanoglou |
Copyright holder |
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Exposure time | 1/15 sec (0.066666666666667) |
F-number | f/4.5 |
ISO speed rating | 2,000 |
Date and time of data generation | 09:58, 16 June 2017 |
Lens focal length | 16 mm |
Orientation | Normal |
Horizontal resolution | 300 dpc |
Vertical resolution | 300 dpc |
Software used | Adobe Photoshop Lightroom 6.1 (Windows) |
File change date and time | 15:43, 23 August 2017 |
Exposure Program | Manual |
Exif version | 2.3 |
Date and time of digitizing | 09:58, 16 June 2017 |
APEX shutter speed | 3.906891 |
APEX aperture | 4.33985 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTimeOriginal subseconds | 7 |
DateTimeDigitized subseconds | 7 |
Focal plane X resolution | 1,675.0149841309 |
Focal plane Y resolution | 1,675.0149841309 |
Focal plane resolution unit | 3 |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 16 mm |
Scene capture type | Standard |
Scene control | High gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 6080815 |
Lens used | 16.0-28.0 mm f/2.8 |
Date metadata was last modified | 18:43, 23 August 2017 |
Unique ID of original document | 469B70AE91EB9CC094124A9040C1A027 |
IIM version | 4 |