Star Vision Ltd. is the first commercial firm to sell the most comprehensive digital China Map Geographic Information

1. Underground Utility
Photogrammetry Survey
BY STAR VISION LIMITED

2. “
”
Photogrammetry is an art, because obtaining
reliable measurements requires certain skills,
techniques and judgments to be made by an
individual.
U.S.A. GOVERNMENT

3. Star Vision Photogrammetry Approach
Project Reference: Culvert Photogrammetry Survey, S. Korea
• Down to mm precision level
3D Position
• With 19 Photos, able to survey
about 5-10m box culvert
length
• Instead of sending surveyor to
underground, SV remote
control camera does the job.
Precise
Economical
Safe

4. Step 1
Photo –taking by Users / Star Vision

5. Step 2
SVL processes all photos (from 10+ to 1000+ photo subject to project site)
to produce a full colour 3D Model ( with 3D Points, 3D point cloud like
LiDAR, laser scanning without laser scanning machine)

6. Culvert Model Brief
3D points : 300,000
3D face (polygon): 600,000
Blue plane is original photo position in 3D space
Dark line is the orientation of 3D axis of camera

7. 30 degree Angle View
detect that the box culvert is not
90 degree align with the
extension wall.
Visualize that about 45 degree to
the right.
The alignment is straight into the
underground.
With water on bottom, left side is
smooth but ceiling is rough as
may due to deterioration.

8. Step 3
SVL provides documentation, land surveying record and
Geo-visualization for 2D, 3D or even 5D Presentation.