Golf Course Surveying
Surveying the topography of a golf course with an accuracy within the range of 1 to 3 centimeters (9 hundredths of a foot).
The original effort estimate for surveying the topography area using conventional surveying techniques and terrestrial scanning was
- 1 field hour, 2 persons, taking Total Station measurements and multiple scans.
- 6 office hours to process the scan data and create a CAD model of the topographic area.
The area was photographed using a DJI Phantom 3 Quadcopter equipped with a 12 MP camera.
A total of 21 photos of the area were taken from ~12 meters (36 feet) above the ground. Photoshooting was done from the perimeter towards the center.
The actual time to survey and create an accurate 3D CAD model of the site was 1.5 hours:
- 30 minutes in the field, one person: 20 minutes to measure 9 control points and 10 minutes to photograph the site.
- 1 office hour to geo-reference the data, create an accurate 3D CAD model of the site, and create 2191 new automatic 3D topo points using DatuGramTM3D Photogrammetry software.
A 3D CAD model, including the sprinklers and the topographic area, was created in a DXF format. In addition, a point file with the new point names, codes, descriptions and coordinates was generated.
Overall 2206 points were generated:
- 15 new 3D points (the sprinklers) were drafted directly on the images
- 2191 new 3D topo points of the area topography were automatically created
Measurement accuracy of all the points was better than 2cm (0.06 ft.) in both position and elevation.