File:Shepherdstown river lock on chesapeake and Ohio canal.jpg
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Shepherdstown_river_lock_on_chesapeake_and_Ohio_canal.jpg (640 × 428 pixels, file size: 167 KB, MIME type: image/jpeg)
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DescriptionShepherdstown river lock on chesapeake and Ohio canal.jpg |
English: Pic of the Shepherdstown River lock at 72.65 miles, just below Lock 38 on the Six mile level.
NPS site says: The stone was cut of gray-blue limestone and is 15’ wide. The canal is close to 100’ wide in this area. The river lock enters the canal at about a 200 degree angle to the up-canal towpath opening. The lock provides the base for the wooden bridge, which allowed mule passages. The river gate pockets were placed shortly after the flare of the extended walls that bordered the river. The flood that washed out the dam in 1889s made the lock unusuable. To close off the flow of water out of the canal into the lock and in the river, an earth closure was built at the towpath. The earth dam leaked and was replaced by a stone wall in the early 1890s. |
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Source | National Park Service http://www.hscl.cr.nps.gov/insidenps/report.asp?STATE=&PARK=CHOH&STRUCTURE=&SORT=&RECORDNO=466 | ||||
Author | National Park Service, Dept of Interior, US Government | ||||
Permission (Reusing this file) |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 14:41, 18 October 2013 | 640 × 428 (167 KB) | Bonnachoven (talk | contribs) | {{Information |Description ={{en|1=Pic of the Shepherdstown River lock at 72.65 miles, just below Lock 38 on the Six mile level. NPS site says: The stone was cut of gray-blue limestone and is 15’ wide. The canal is close to 100’ wide in this a... |
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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 | NIKON CORPORATION |
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Camera model | NIKON D60 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/4 |
ISO speed rating | 200 |
Date and time of data generation | 17:02, 12 August 2012 |
Lens focal length | 18 mm |
Width | 3,872 px |
Height | 2,592 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS5 Macintosh |
File change date and time | 20:39, 20 August 2012 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 17:02, 12 August 2012 |
Meaning of each component |
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Image compression mode | 2 |
APEX shutter speed | 5.906891 |
APEX aperture | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3.6 APEX (f/3.48) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 30 |
DateTimeOriginal subseconds | 30 |
DateTimeDigitized subseconds | 30 |
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 | 1 |
Focal length in 35 mm film | 27 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 3274297 |
Lens used | 18.0-55.0 mm f/3.5-5.6 |
Date metadata was last modified | 16:39, 20 August 2012 |
Unique ID of original document | xmp.did:B754318709206811937682F5B0222363 |
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12 August 2012
0.01666666666666666666 second
18 millimetre
200
image/jpeg
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