File:Stellardiagram-Zhengho.jpg

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Summary
editAuthor |
The author is unknown, but the charts were derived from works by Zheng He's expeditionary navigators during the early 15th century |
Description |
This navigational chart is one of the four stellar diagrams included in the Wubei Zhi, published in circa 1628. It appears in chapter 240, folio 24 r. The chart specifies the guiding stars enroute from Hormuz to Calicut. |
Source/Photographer | Not given by uploader |
Other versions |
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Reference InfoField | Mills, J.V.G. (1970). Ying-yai Sheng-lan: 'The Overall Survey of the Ocean's Shores' [1433]. pp. 335–346. |
Licensing
editPublic domainPublic domainfalsefalse |
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer. ![]() |
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 19:32, 1 August 2015 | ![]() | 1,385 × 1,820 (1.74 MB) | Hzh (talk | contribs) | clearer image |
15:55, 8 December 2005 | ![]() | 588 × 800 (78 KB) | Gisling (talk | contribs) | Admiral Zheng Ho's stellar navigation diagram |
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Metadata
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Camera manufacturer | Panasonic |
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Camera model | DMC-ZS1 |
Exposure time | 1/40 sec (0.025) |
F-number | f/4.1 |
ISO speed rating | 160 |
Date and time of data generation | 17:44, 20 July 2011 |
Lens focal length | 11 mm |
Orientation | Normal |
Horizontal resolution | 350 dpi |
Vertical resolution | 350 dpi |
Software used | Digital Photo Professional |
File change date and time | 17:44, 20 July 2011 |
Y and C positioning | Centered |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 17:44, 20 July 2011 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3.44 APEX (f/3.29) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
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 | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 121 mm |
Scene capture type | Standard |
Scene control | Low gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |