Laser Scanning and Geo-informational Technologies

// Airborne Laser Scanning and Photographic Survey

Airborne laser scanning is often the most rapid, reliable, and sometimes the only way to collect data of the actual surface in remote areas or forested areas.

Airborne laser scanning allows remote recognition of objects shape, location and reflectance.

The Institute is equipped with RIEGL LMS Q680I and ALTM Gemini scanners, which are the most efficient of that class. They are distinguished by high efficiency and accuracy, and can be installed on various types of aircraft.

Воздушное лазерное сканирование и аэрофотосъемка Воздушное лазерное сканирование и аэрофотосъемка

 

Airborne laser scanning (ALS)

Topographic operational procedures for terrain and land targets geo-spatial data collection. The main method of laser scanning is based on using an airborne laser scanner - lidar, installed aboard an aircraft. The airborne laser scanner navigation unit operation is based on the real time interaction of a satellite navigation system (GPS / GLONASS) and inertial instrument system.

With 15 years of track record in ALS worldwide, NIPIStroyTEK airborne surveying experts guarantee a high quality of work they do.

The Institute's professional staff-members create topographic maps, digital elevation, and surface models at a short notice and with a high accuracy.

The result of ALS is a 3D cloud of laser points, classified "ground/non-ground" with density up to several tens of point per one square meter and with vertical accuracy better than 10 cm (at hard surfaces). In fact, it is a digital model of true relief of high density and accuracy, the basis for orthophotos, digital topographic maps of scales 1:500 and smaller, three-dimensional terrain and objects models.

The flight speed:  90-350 km / h
Accuracy of the coordinates: * 5-10 cm
Elevation accuracy :* 10-15 cm
Point density per 1 m2 of the surface area: * 1-10
Shooting altitude:       200-4000 m
Swath width:  93-115% of the survey altitude
Processing: up to 10 km (man-day)
* At a survey shooting altitude of 500-1000 m

Advantages of airborne laser scanning:

получение трехмерных моделей рельефа и всех наземных объектов;

  • Obtaining three-dimensional terrain and all ground facilities models;
  • Detailed images of three-dimensional scenes by selecting the appropriate flight and shooting modes (height and speed, as well as the swath width);
  • Exclusion of land surveying from the technological cycle, mobility of the aerial survey complex and ground post-processing;
  • True relief (land surface) without significant loss of accuracy under crown and grass canopy;
  • Availability of  topographic survey results in a featureless terrain area (complete snowfields, tundra, deserts, beaches).

 Vexcel Ultra Cam-Lp

Aerial photography is one of the main methods of obtaining objective information about the earth's surface and objects located on it, from the air, using digital or analog cameras

Aerial photography in combination with ALS can help get a better idea about the subject in the fullest sense.

 

 

The Institute carries out a full range of aerial work:

  • Compilation survey networking;
  • Aerial photography survey and ALS;
  • Data pre-processing and thematic processing;
  • Creation and printing topographic products of different sizes and designation.

 

The new Vexcel Ultra Cam-Lp full-size digital topographic aerial camera allows professional staff-members of the Institute to produce high quality topographic products for use in all areas for a wide range of functions:

  • Orthophotomaps of scales 1:1000 and smaller;
  • Topographic and thematic maps and plans;
  • Textured 3D-models.
Electric power line (LEP) laser point cell array
Housing premises laser point cell array

Electric power line (LEP) laser pointcell array

Housing premises laser point cell array

  • Tomsk city urban development 3D model

    Obtained as a result of laser scanning, a three-dimensional model of an urban land area has been complemented by data on the underground utility lines and attribute-based information.

  • Modern technology of three-dimensional terrain modeling

    This consists of a combined application of three-dimensional modeling technology with date obtained by aerial photography, terrestrial surveys and thermal imaging, as well as the application of automated pipelines tracing to the engineering design, construction and operation of pipelines.

  • "Moscow - Suzemka" railway section mobile laser scanning

    The video presentation highlights the mobile laser scanning (point cloud) data obtained by the railway survey. The points can be textured based on the color of the photographs obtained by scanning with the digital cameras integrated into the system, as well as colorized in accordance with various parameters, such as laser reflection intensity or elevation.

  • Mobile laser scanning

    The process of surveying with the use of a mobile laser scanner; system mounting and dismounting on a vehicle; an example of the data obtained during the survey.

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