File:Semaphore Tower at Nabasan, Goghat near Arambagh, Hooghly district 22.jpg
Original file (3,231 × 5,970 pixels, file size: 11.71 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionSemaphore Tower at Nabasan, Goghat near Arambagh, Hooghly district 22.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° 53′ 52.37″ N, 87° 41′ 26.71″ E | View this and other nearby images on: OpenStreetMap | 22.897880; 87.690754 |
---|
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 15:26, 13 November 2022 | 3,231 × 5,970 (11.71 MB) | Amitabha Gupta (talk | contribs) | Uploaded own work with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
Camera model | Canon PowerShot SX150 IS |
Exposure time | 1/200 sec (0.005) |
F-number | f/6.3 |
ISO speed rating | 100 |
Date and time of data generation | 11:02, 3 July 2013 |
Lens focal length | 5.413 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS3 Windows |
File change date and time | 20:13, 13 November 2022 |
Y and C positioning | Co-sited |
Exif version | 2.3 |
Date and time of digitizing | 11:02, 3 July 2013 |
Meaning of each component |
|
Image compression mode | 3 |
APEX shutter speed | 7.65625 |
APEX aperture | 5.3125 |
APEX exposure bias | 0 |
Maximum land aperture | 3.625 APEX (f/3.51) |
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 |
Supported Flashpix version | 1 |
Image width | 3,231 px |
Image height | 5,970 px |
Rating (out of 5) | 0 |
Date metadata was last modified | 01:43, 14 November 2022 |
IIM version | 32,709 |