Fresno Park Topographic Map
QK needed to survey a city Park in Fresno for the re-design of the wading-pool area.
The estimated effort using conventional surveying techniques was:
- 7 field hours using Total Station
- 14 office hours to create Topographic map
DJI Phantom 3 drone with DatuFlyTM app was used, allowing for quick, precise and easy image capturing. Flight duration was 6 min in an altitude of 109 ft. (33m).
Resolution was 2.4cm/pixel.
Acquiring Ground Control Points
6 points were used as Ground Control Points.
6 additional points were used as Check Points, to detect the accuracy of the project.
3D CAD model in DXF format was created. It included the area topography and park’s constructions that were generated by drafting directly on the images using DatuSurveyTM.
True orthophoto and dense point cloud were generated.
A point file, including names, codes, descriptions and coordinates of all new points was generated. Overall, more than 180 new points were drafted directly on the images.
The measurement accuracy of all the points was better than 5 cm (0.173 ft.) in 3D coordinates.
The results were exported to Civil3D software to create a Topo Map.
DatuSurvey Enterprise Outputs
Generation time: 30 min
Dense Point Cloud
Generation time: 15 min
Orthophoto with CAD data
Topo Map in Civil3D