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3D Terrestrial Laser Scanning, LIDAR

Application of 3D terrestrial laser scanning in the geodetic activities of "GEO ZEMIA" Ltd.

The company uses the professional software for processing of the data from the 3D terrestrial laser scanning Trimble RealWorks.

Content

General information

Some areas of application

Geodetic measurements of facades. Orthophotoplans

3D laser scanning of interior for creation of digital model of plans

Creation of 360 degree panoramic photos

Creation of video and high-accuracy 3D digital models

3D digital models of of decorative and agriculture plants

Geodetic measurements for deformation analysis

High-accuracy geodetic measurements of cadastral objects in the urban area

Software environment - Trimble RealWorks

I. General information

3D Terrestrial Laser Scanning, as part of LIDAR (LIght Detection And Ranging) technology is one contemporary way for fast and accurate determination (calculation) of 3D coordinates of points from the surrounding space, using geodetic measurements. Laser scanners could be classified by their way of measurement:
-pulsed TOF (Time Оf Flight);
-phase based;
-based on triangulation.

The geodetic measurements are conducted using an active system (scanner) and are contactless - i.e. it is not required a human presence at the place of the measured point. In this way the terrestrial laser scanning gives the possibility to perform geodetic measurements of hazardous or difficult to reach places, e.g. landslide monitoring, bridge measurements, facades of buildings, tunnels and many others.

According to the way of registration of the measurements, the laser scanning system could be divided into pulse and phase based.

The values of the following quantities are subject of record: horizontal, vertical angle and the distance to each point from the cloud (see below) as well as the intensity of the reflected laser signal. The coordinates of the points from the cloud are determined in the local coordinate system of the laser scanner. The data could be also georeferenced in the relevant coordinate system.

From the created 3D digital model could be extracted very high accuracy spatial data for the scanned object. The result from the conducted geodetic measurements is the so called point cloud. The last contains exclusively accurate information for the object.This is also valid for objects with complex spatial geometry.

One of the many advantages of the 3D laser scanning is the enormous decrease of the costs for performing of the geodetic measurements, without compromise in the quality.

II. Some areas of application

-surveying (design, geodetic measurements, 3D visualization of objects, high-accuracy measurements of any details of the scanned object, e.g. distances, heights;
-documentation of objects, calculation of volumes;
-creation of cross-sections of the objects;
-architecture (high-accuracy measurements of facades and interior);
-archaeology;
-industry;
-engineering activities and many others.

III. Geodetic measurements of facades. Orthophotoplans

windows from orthophotoplans

3D terrestrial laser scanning - creation of orthophotoplan

 

3D terrestrial laser scanning - creation of orthophotoplan

geodetic measurements of a facade
using 3D laser scanner Trimble

 

IV. 3D laser scanning of interior for creation of digital model of plans

3D laser scanning of interior for creation of digital model of architectural plan

3D laser scanning of interior for creation of digital model of architectural plan

3D laser scanning of interior for creation of digital model of architectural plan - under-roof space

V. Creation of 360 degree panoramic photos

3D Terrestrial Laser Scanning - creation of 360 degree panoramic photos

VI. Creation of high-accuracy 3D digital models. Export of video from Trimble RealWorks

video from the 3D digital model of Troian Monastery

 

video from the 3D digital model of the west facade of Troian Monastery

 

Photos from the geodetic measurements with our 3D terrestrial laser scanner Trimble TX5

3D terrestrial laser scanning of Troian Monastery

VII. 3D digital models of of decorative and agriculture plants

creation of 3D digital models of decorative and agriculture plants

 

VIII. Geodetic measurements for deformation analysis

geodetic measurements - 3D terrestrial laser scanning of a steel construction

geodetic measurements - 3D terrestrial laser scanning of a steel construction

IX. High-accuracy survey of the cadastral objects in the urban areas

3D Terrestrial Laser Scanning

3D Terrestrial Laser Scanning

3D Terrestrial Laser Scanning

X. Software environment - Trimble RealWorks

view from "inside" of Trimble RealWorks

3D terrestrial laser scanning

construction of a building - view from above

construction of a building - view from above - 3D Terrestrial Laser Scanning

determination of the dimensions of the object in the 3D space

3D terrestrial laser scanning - dimensions

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