Four TDF antenna sites on the Oyapock, located and measured in 3D
In March 2019, drone photogrammetry of four sites between Saint-Georges and Camopi: 3D model, orthoplan, position and height of each antenna, delivered between 29 March and 4 April.
Background
TDF needed precise positions for its antennas at Saint-Georges, Mourgue, Waïwaru and Camopi, along the Oyapock. The available coordinates, rounded to the arcsecond, left an uncertainty of about 20 m in plan, and three of the sites can only be reached by river or by air.
What we did
In late March 2019, on each site, overall views followed by photogrammetric series around the tower were used to compute a 3D model, an orthoplan georeferenced in WGS 84, the position of the antenna and the relative height of the antenna and the tower: 59.2 m for the Saint-Georges antenna. Saint-Georges was delivered on 29 March, Mourgue and Waïwaru on 2 April, Camopi on 4 April.
In the mission log
Position and height of telecom antennas on four sites along the Oyapock
Between Saint-Georges and Camopi: overall views, photogrammetry, 3D model and orthophoto plan of each site, with the relative height of the antennas and towers. At Saint-Georges the antenna was measured at 59.2 m and its position computed to a hundredth of an arc second.
- 4 sites
- 59,2 m Saint-Georges antenna
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97310 Kourou
French Guiana
Route des Trois-Îlets
97229 Les Trois-Îlets
Martinique
20030-041 Rio de Janeiro – RJ
Brazil