in friendly relations with:

Drakkar‘s technologies in use: real time 3D cartography, topography & civil engineering works.

Mobile mapping with Drakkar‘s PolyScan: methodology, metrological and algorithmic support.”

LIDAR mobile technologies from Drakkar ltd.

In friendly relations with:

Partner and representative of:

… and others


Drakkar’s main directions of activity:

- Geodesy & Topography- Map making- Mine survey- Architectural and cultural heritage survey- Archeological survey- …- Aerial photography & Lidar (Laser scanning) survey.

The company is ISO 9001 certified


Our approach:

1) “Home-made” geodetic tools (apparatus, software) and technologies.2) Technological partners up to the mark – Microsoft-Vexcel, Terrasolid, AHAB, …3) Searching for “borderline” own technologies.


-All equipment can be mounted on a car, fixed wing plane or helicopter.- The effective accuracy within 1 cm can be expected while using a car as a carier.- The survey can be implemented with an unlimited speed (theoretically).

… just put into operation:


Functional scheme includes:- Laser scanner- GPS- Inertial Measurement Unit- Digital metric photo camera- Computer for data storage and control- Software

Laser repetition rate: 24 kHzMaximum range: 2000 mMission duration: practically unlimited


Can be mounted on:

Cars

Carriages

Planes and helicoptersAnd also:-Boats-Balloons-Paragliders- Unmanned systems,- …


Pulse repetition rate 24 kHz Productivity 11 kHz (oscillating mode )

8 kHz (rotating mode)Range finder accuracy Better than 5 cm (at flight altitude less than 300

m)

Better than 10 cm (at flight altitude less than 1000 m)

Better than 20 cm (at flight altitude less than 2000 m)

Planimetric (X,Y) accuracy

1/5000 * H, where H is a flight elevation

Reply registration mode

First, Last

Field of view 80 ° across the flight direction Power consumption 350 WtWeight 19 kg


Interesting features:1)Extremely light.

2)Can scan in “swings mode” or vertically.


Resolution (H × V) 6576 × 4384Sensor Kodak KAI-29050Sensor Size (Optical Format) Progressive Scan Interline 35 mmSensor Type Transfer CCDPixel Size 5.5 μm × 5.5 μmMax. Frame Rate 5 fps

Current Drakkar’s camera:

Just introduced:

Price about 10 000 Euro

· 72 images per second in full resolution· 25 MPixel Sensor resolution· Very compact housing· CoaxPress high-speed Interface· Monochrome or color sensor· Real-time image data transfer

Price principally the same


Colored 3D clouds:

Related tasks:-Data fusion (Riegl, Novatel, Waypoint, Drakkar, …)- Off-set measurement.- Lidar and camera calibration.- others.

Distance: 200 m


Applications:

“Regular” man-made object (Power Lines, for example)


Examples:That’s what we have - point clouds.

What to do with point clouds?

Distance: 50 m


That’s what we need: mathematical models

+ IR data+ data fusion algorithms

Remark: Lidar to Thermovison fusion is standard now

Innovative Lidar Solutions Conference, June 26, 2009

Power Lines Lidar Survey:

Main goals:

Full automation of wire, cables and other similar 1-D object recognition (done!) Insulators, wires break points (derivative break) Tower detection, recognition and geopositioning: - with a priory defined exact frame model (done!) - without (know how to do)


Wires and other similar 1-D object detection in noisy environment


Applications:

Surface modeling and making cross-sections

Rendering: making naturally looking models

Making cross-sections in AutoCAD format (Israel road agency)

Cross-section accuracy estimations

No worse than 50 cm

No worse than 5 cm

No worse than 2 cm


Applications:

Dispersed objects (forest)

3-D reconstruction and modeling of a tree stand structure and a separate trees

A Possibility for Topography Detection Under Forest Canopy


DSM local maximums – to detect probable stem position

ii yx

E

N

Ni 1

Empirical distribution lines for larch trees by morphometric indices of stems and crowns and approximated by Weibull distribution: а) - DBH, b) - H, c) – Dcr, d) - Lcr., e) - Scr., f)

- G f (Dcr.)

а)

12

34

56

78

910

D 1.3 , cm

0

10

20

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40

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item

b )

12

34

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H, m

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10

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0 1 2 3 4

Dcr ., m

0

20

40

60

N, i

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d )

1 2 3 4 5 6 7 8

Lcr ., m

0

10

20

30

N, i

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e )

0 1 2 3 4 5 6 7 8 9

Scr ., m 2

0

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Dcr ., m

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0.005

0.010

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Under canopy object detection

Unselected points

Selected points

Result


Arial photo


Intermediate conclusions:

-Drakkar technologies and skills cover all above-water part of any lidar (as well sonar) bathymetrical project.- Drakkar is especially strong in alliance with its friendly companies, such as Airborne Hydrography, Terrasolid, Marine Construction.

Final reminderA lot of additional information on modern lidars, photogrammetry, geospatial modeling will be delivered at:


Combining laser scanning and digital photography:- Making photorealistic 3D models .- Clear detection of traffic lane marking.- Making ortophotomaps.


Conclusions

-Using Mobile Liders have a number of decisive technical and economical advantages for making civil engineering works for roads, real roads, runways and other similar objects: accuracy within 1-2 cm, direct geopositioning, productivity up to 30 km per day.- Main technological stages (calibration, data acquiring, office processing) are automated which guarantees achieving reliable output materials.- Output includes precise 3D models including DTM, DSM, deformation, edges, crevices, cavities, traffic lane marking and so on. -Drakkar ltd. is fully equipped and has an extensive experience for any kinds of mobile laser scanning works in Israel and globally.


Thank you!

in friendly relations with:

Documents

drakkars technologies

mobile mapping

flight altitude

survey architectural

current drakkars camera

drakkars polyscan

data storage

mpixel sensor resolution