English: GPS Survey Equipment at Weir Dyke Bridge. Photo taken at Weir Dyke bridge 172000. The gear belonged to a group checking water levels in nearby drains who had established a datum on the bridge using GPS (8 satellites) and this gave me an opportunity to check my Etrex, which uses 4 satellites, against their professional equipment. The difference was less than 1m - my Etrex was showing 20ft accuracy at the time. For another picture see 336893.
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 David Wright and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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== {{int:filedesc}} == {{Information |description={{en|1=GPS Survey Equipment at Weir Dyke Bridge Photo taken at Weir Dyke bridge 172000. The gear belonged to a group checking water levels in nearby drains who had established a datum on the bridge usi
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Camera manufacturer
FUJIFILM
Camera model
FinePix S5600
Exposure time
1/300 sec (0.0033333333333333)
F Number
f/3.2
ISO speed rating
100
Date and time of data generation
13:38, 12 February 2007
Lens focal length
6.3 mm
Orientation
Normal
Horizontal resolution
72 dpi
Vertical resolution
72 dpi
Software used
Adobe Photoshop Elements 5.0 (20060914.r.77) Windows