Survey points on aerial imagery

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This is a list of near or "on the ground" survey points with known accurate coordinates, which are visible on one or more aerial imagery layer. This list is useful to try to check the real datum used by the aerial imagery.

Australia

Survey marks

(accuracy is usually not very good: http://www.ga.gov.au/ngrs/)

GNSS Stations

http://www.ga.gov.au/ngrs/

Nodes:

Osm node type Coordinates + datum imagery layer external url Note
https://www.openstreetmap.org/node/6514708097 GNSS Antenna 149°00'36.54757" E -35°18'58.19901" N GDA94 ACTmapi Imagery 2017, ACTmapi Imagery 2018, LPI Nsw Imagery

Cyprus

Nodes

https://www.openstreetmap.org/node/6516312263

France

Survey marks

Survey_points with accurate RGF93 coordinates are already in OpenStreetMap. Official website: https://geodesie.ign.fr/fiches/index.php?module=e&action=visugeod

GNSS Stations

http://rgp.ign.fr/

Nodes:

Osm node type Coordinates + datum imagery layer external url Note
https://www.openstreetmap.org/node/670517301 survey point 4° 47' 11.8194" E 45° 39' 30.1359" N ETRS89 Lyon Orthophoto 8cm http://geodesie.ign.fr/fiches/index.php?module=e&action=fichepdf&source=carte&sit_no=6904601
https://www.openstreetmap.org/node/670518430 survey point 4° 53' 37.9643" E 45° 50' 47.1157" N ETRS89 Lyon Orthophoto 8cm http://geodesie.ign.fr/fiches/index.php?module=e&action=fichepdf&source=carte&sit_no=6929301
https://www.openstreetmap.org/node/670152116 survey point Loire-Atlantique - Orthophotos 2016 - 10 cm http://geodesie.ign.fr/fiches/index.php?module=e&action=fichepdf&source=carte&sit_no=4413601 Pointe Saint-Gildas
https://www.openstreetmap.org/node/670152782 survey point 1° 25' 47.76967" W 46° 58' 08.12041" N ETRS89 Loire-Atlantique - Orthophotos 2016 - 10 cm http://geodesie.ign.fr/fiches/index.php?module=e&action=fichepdf&source=carte&sit_no=4421606 Vieillevigne
https://www.openstreetmap.org/node/670632793 survey point 2° 28' 19.9911" E 48° 52' 10.0095" N ETRS89 BDOrtho IGN http://geodesie.ign.fr/fiches/index.php?module=e&action=fichepdf&source=carte&sit_no=9306401 Rosny-sous-Bois (pousser le gamma)
https://www.openstreetmap.org/node/670547097 survey point 2° 26' 07.32390" E 48° 50' 22.10171" N ETRS89 BDOrtho IGN http://geodesie.ign.fr/fiches/index.php?module=e&action=fichepdf&source=carte&sit_no=7505601 Saint-Mandé