Version 10 (modified by mark1, 7 years ago) (diff)

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Calibration Sites

Annotated overview showing approximate locations of GCPs

Little Rissington - September 2008 onwards

The survey site is at Little Rissington – an old MoD airfield and business park. For the survey, a GPS base station was set up in the grounds of the business park, specifically it was located south west of the first hangar when you enter the business park. The hangar is in use as the premises of a removal firm. This base station site is marked as B on Figure 1. It was collecting data for approximately 9 hours. Whilst the base station was in position collecting data, 64 additional points were surveyed; 63 of which were on the airfield and 1 on the business park. Each point was surveyed using GPS for 5 minutes. The points were surveyed for use as LIDAR, hyperspectral and camera control points, although not all points are suitable for every sensor. Photographs were taken of all the survey points by both Sterling Surveys and ARSF

See the attached documents for details.

The attached little_riss_survey_Sep08.csv file contains the locations of ground control points surveyed at the site.

Note: Point 64 shown on the image is in the business park to the north of the airfield (top left corner of image).








Monks Wood - pre September 2008

Monkswood calibration targets (annotated)

Centre for Ecology and Hydrology Monks Wood site.

Approximate location:

  • ETRS-89 (WGS-84) XYZ: 3899843.8284m, -16318.7154m, 5030129.9893m
    • Longitude: 0 degrees, 14 minutes, 13.56 seconds (52.474564)
    • Latitude: 52 degrees, 28 minutes, 28.43 seconds (0.237100)
  • OS Grid (OSGB-36): 519857.522, 279414.596
    • Grid ref: TL 52040 88645

Please note: point 25 on the previous survey is the same point as point 7 on this survey. As point 7 is an average solution derived from four other points + a temporary base station the result above is a far better solution..

Note that point 7 is not shown on the image below. It actually occurs almost due north of target 6 beyond the Monks Wood buildings at the top right hand corner of the grass square that is actually just off the image. That is the 7th target of slabs used and recorded as the precise GPS points in the originally supplied coords.xls table.

GPS Locations of targets:

Point ETRS 89 (WGS 84) Pos Qlty Hgt Qlty Pos+Hgt Qlty OS Grid (OSGB 36)
Id. X Y Z Quality Quality Quality E N H
1 3899990.9122 -16767.0766 5030016.9027 0.0096 0.0146 0.0175 519414.561 279216.784 44.499
2 3899983.7474 -16573.9922 5030023.1466 0.0049 0.0063 0.0080 519607.267 279231.601 44.576
3 3899977.7336 -16320.1818 5030025.6952 0.0120 0.0178 0.0214 519860.745 279244.932 42.279
4 3899843.8284 -16318.7154 5030129.9893 0.0035 0.0069 0.0077 519857.522 279414.596 43.201
5 3899738.4140 -16316.4996 5030210.5789 0.0017 0.0020 0.0027 519856.068 279547.267 42.728
6 3899731.4446 -16091.6668 5030214.0582 0.0002 0.0005 0.0006 520080.550 279561.121 40.668
7 Not shown 3899489.7218 -16085.1161 5030392.4048 0.0040 0.0062 0.0074 520078.781 279861.452 34.480

See other attachments below for spreadsheets and vector files.

Attachments (18)