Underground Utility Photogrammetry Survey

BY STAR VISION LIMITED

“”

Photogrammetry is an art, because obtaining

reliable measurements requires certain skills,

techniques and judgments to be made by an

individual.

U.S.A. GOVERNMENT

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

Step 1Photo –taking by Users / Star Vision

Step 2SVL 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)

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

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.

Step 3

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