File:Interiors of Semaphore Tower at Parbbatichak near Arambagh, Hooghly district 08.jpg
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Summary
editDescriptionInteriors of Semaphore Tower at Parbbatichak near Arambagh, Hooghly district 08.jpg |
English: The optical telegraph system in India was first suggested in the early 1800s for military use. A survey line was to be set up between Calcutta and Chunar in Uttar Pradesh, and towers built along the route at different stations including Howrah, Hooghly, Purulia, Hazaribagh and Gaya along the Old Benaras Road or Military Road (later replaced by G.T. Road).
An account in Anton A. Huurdeman’s book Worldwide History of Telecommunications, states that there were as many as 45 semaphore towers built along the Calcutta-Chunar line. It is hard to say how many of those still remain, but about 18 have been located so far. After limited use, with mounting costs, the Calcutta-Chunar line was abandoned as a failed project in 1828. |
Date | |
Source | Own work |
Author | Amitabha Gupta |
Object location | 22° 50′ 30.94″ N, 87° 47′ 21.97″ E ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:49, 13 November 2022 | ![]() | 4,320 × 3,240 (3.5 MB) | Amitabha Gupta (talk | contribs) | Uploaded own work with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot SX150 IS |
Exposure time | 1/5 sec (0.2) |
F-number | f/6.3 |
ISO speed rating | 100 |
Date and time of data generation | 09:15, 3 July 2013 |
Lens focal length | 5 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 09:15, 3 July 2013 |
Y and C positioning | Co-sited |
Exif version | 2.3 |
Date and time of digitizing | 09:15, 3 July 2013 |
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APEX aperture | 5.3125 |
APEX exposure bias | 0 |
Maximum land aperture | 3.53125 APEX (f/3.4) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 17,777.777777778 |
Focal plane Y resolution | 17,802.197802198 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Manual white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Rating (out of 5) | 0 |