File:General Roy monument, Hampton Hill. - geograph.org.uk - 373804.jpg
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[edit]DescriptionGeneral Roy monument, Hampton Hill. - geograph.org.uk - 373804.jpg |
English: General Roy monument, Hampton Hill. The inscription on the plaque reads:
"THIS TABLET WAS AFFIXED IN 1926 TO COMMEMORATE THE 200TH ANNIVERSARY OF THE BIRTH OF MAJOR GENERAL WILLIAM ROY F.R.S., BORN 4TH MAY 1726 DIED 1ST JULY 1790. HE CONCEIVED THE IDEA OF CARRYING OUT THE TRIANGULATION OF THIS COUNTRY AND OF CONSTRUCTING A COMPLETE AND ACCURATE MAP, AND THEREBY LAID THE FOUNDATION OF THE ORDNANCE SURVEY THIS GUN MARKS THE S.E. TERMINAL OF THE BASE WHICH WAS MEASURED IN 1784 UNDER THE SUPERVISION OF GENERAL ROY, AS PART OF THE OBSERVATIONS FOR DETERMINING THE RELATIVE POSITIONS OF THE GREENWICH AND PARIS OBSERVATORIES THIS MEASUREMENT WAS RENDERED POSSIBLE BY THE MUNIFICENCE OF H.M. KING GEORGE III, WHO INSPECTED THE WORK ON 21ST AUGUST 1784. THE BASE WAS MEASURED AGAIN IN 1791 BY CAPTAIN MUDGE, AS THE COMMENCEMENT OF THE PRINCIPAL TRIANGULATION OF GREAT BRITAIN. LENGTH OF BASE REDUCED TO M.S.L. AS MEASURED BY ROY 27404.01 FEET AS MEASURED BY MUDGE 27404.24 FEET DETERMINED BY CLARKE IN 1858 IN TERMS OF THE ORDNANCE SURVEY STANDARD 01 27406.19 FEET" This is really quite a significant picture for Geograph, as this is the very point where the triangulation of Great Britain started, leading ultimately to the Ordnance Survey and the National Grid system. The other end of the baseline is on the north side of Heathrow Airport in square TQ0776 and is marked with another cannon, but due to airport development this is no longer in its original position. I originally photographed this monument some years ago, when the plaque was fixed to the top of the cannon. It has now been moved to the nearby railings, where it sits on a rickety wooden stand and is held in place by plastic cable-ties. It is an easy target for vandals, although somehow it has survived this long. Where it was previously fixed to the cannon there is now a crude wooden bung. I don't know whether the site is cared for by Richmond Council, or the OS or by Crown Estates, but it really should be better cared for. |
Date | |
Source | From geograph.org.uk |
Author | Stephen Williams |
Attribution (required by the license) InfoField | Stephen Williams / General Roy monument, Hampton Hill. / |
InfoField | Stephen Williams / General Roy monument, Hampton Hill. |
Camera location | 51° 25′ 35″ N, 0° 21′ 54″ W | View this and other nearby images on: OpenStreetMap | 51.426280; -0.364900 |
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Object location | 51° 25′ 35″ N, 0° 21′ 55″ W | View this and other nearby images on: OpenStreetMap | 51.426470; -0.365200 |
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Licensing
[edit]This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Stephen Williams and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:42, 4 January 2011 | 509 × 640 (161 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=General Roy monument, Hampton Hill. The inscription on the plaque reads: "THIS TABLET WAS AFFIXED IN 1926 TO COMMEMORATE THE 200TH ANNIVERSARY OF THE BIRTH OF MAJOR GENERAL WILLIAM ROY F.R.S., BORN |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A70 |
Exposure time | 1/1,000 sec (0.001) |
F-number | f/3.2 |
Date and time of data generation | 09:47, 21 March 2007 |
Lens focal length | 5.40625 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 17:31, 22 March 2007 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 09:47, 21 March 2007 |
Image compression mode | 5 |
APEX shutter speed | 9.96875 |
APEX aperture | 3.34375 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Color space | sRGB |
Focal plane X resolution | 9,846.1538461538 |
Focal plane Y resolution | 9,846.1538461538 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Structured data
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21 March 2007
51°25'34.61"N, 0°21'53.64"W
51°25'35.29"N, 0°21'54.72"W
- Information field template with formatting
- Files with coordinates missing SDC location of creation (51° N, 1° W)
- CC-BY-SA-2.0
- Images from Geograph Britain and Ireland
- Images from Geograph Britain and Ireland missing SDC location of creation
- Images from Geograph Britain and Ireland missing SDC MIME type
- Images from Geograph Britain and Ireland missing SDC geograph.org.uk image ID
- United Kingdom photographs taken on 2007-03-21
- Images by Stephen Williams