Laser Scanning Method Research Articles

Laser Scanning Guided Localization Imaging with a Laser-Machined Two-Dimensional Flexible Ultrasonic Array.

Advances in flexible integrated circuit technology and piezoelectric materials allow high-quality stretchable piezoelectric transducers to be built in a form that is easy to integrate with the body’s soft, curved, and time-dynamic surfaces. The resulting capabilities create new opportunities for studying disease states, monitoring health/wellness, building human–machine interfaces, and performing other operations. However, more widespread application scenarios are placing new demands on the high flexibility and small size of the array. This paper provides a 8 × 8 two-dimensional flexible ultrasonic array (2D-FUA) based on laser micromachining; a novel single-layer “island bridge” structure was used to design flexible array and piezoelectric array elements to improve the imaging capability on complex surfaces. The mechanical and acoustoelectric properties of the array are characterized, and a novel laser scanning and positioning method is introduced to solve the problem of array element displacement after deformation of the 2D-FUA. Finally, a multi-modal localization imaging experiment was carried out on the multi-target steel pin on the plane and curved surface based on the Verasonics system. The results show that the laser scanning method has the ability to assist the rapid imaging of flexible arrays on surfaces with complex shapes, and that 2D-FUA has wide application potential in medical-assisted localization imaging.

Preservation of Cultural Heritage: A Comparison Study of 3D Modelling between Laser Scanning, Depth Image and Photogrammetry Methods

This paper presents a multi-technique approach for the purpose of recording and documentation of cultural heritage. The focal point of the study is to generate a three-dimensional (3D) model representation of a physical object and to apply orthographic projection to document the design. Three main methods are used to generate 3D objects, namely Laser Range Scanner, Depth Image Data, and Photogrammetry. A comparison analysis is designed to evaluate each method accordingly. For evaluation purposes, a case study is designed where a scale model of a 25-cm-long famous historic Portuguese Indian Armada, known as “Flor de la Mar” is selected as a sample for generating 3D model records. The comparison analysis shows that the Photogrammetry method is superior in terms of detail, precision, and visualization. On the other hand, Laser Range Scanner and Depth Image Data method can display the data into the point cloud but with less accuracy. Overall, the result shows that the Photogrammetry method achieves a strong 97.6% of accuracy in terms of dimensions and shapes.

Application of combined terrestrial laser scanning and unmanned aerial vehicle digital photogrammetry method in high rock slope stability analysis: A case study

Recent advancements in remote sensing techniques have made it possible to overcome the risky issues using conventional methods and have opened up new opportunities for collecting data on discontinuity characteristics. This research compares the application of a Terrestrial Laser Scanner (TLS) and Unmanned Aerial Vehicle (UAV) in rock slope stability analysis. Two case studies, Ulu Choh Quarry and Jelapang Rock Slope are analysed using Kinematic Analysis and Slope Mass Rating (SMR) to depict rock through the 3D point cloud. The techniques are compared with the hand mapping method concerning the accuracy of the data acquisition in assessing the rock slope. The standard deviation for the dip and dip direction between digital capture and hand mapping is 2.97° and 2.86°, which falls under the acceptable tolerance limit. The integration of UAV and TLS also generates excellent clear point cloud data from the top to the toe of the slope.

Thickness measurement method for the thermal protection layer of a solid rocket motor based on a laser point cloud

The thermal protection layer of the solid rocket motor (SRM) is an important elastic material applied to the adhesive shell and propellant; the thickness of the layer is related to the performance of the SRM. This paper proposes a method of linear laser scanning to realise the precise thickness measurement of the thermal protection layer. The custom-designed data acquisition device separately collects distance values from the inner surface of the thermal protection layer, before and after coating, using a linear laser sensor. The two measured distance values are subtracted and D-H modelling (a classical kinematics modelling method proposed by Denavit and Hartenberg) is conducted, then the system errors are analysed and calibrated to obtain the 3D point cloud data of the profile. The iterative closest point (ICP) algorithm is used to register the point cloud data relating to the internal surface, then an octree-based simplification method is proposed to realise the denoising and simplification of the point cloud data. Next, the normal vector of the point cloud data is calculated and the reference surface is extracted as the projection plane. The simplified point cloud is then projected onto the plane and the geometric information of the point cloud data after projection is extracted. A series of distance differences, namely the thickness of the thermal protection layer, is obtained. Finally, the Poisson surface reconstruction algorithm is used to display the inner surface of the thermal protection layer. The results show that the difference between the calculated values and the measured values is less than 0.1 mm, indicating that the thickness of the thermal protection layer of the SRM can be measured by the proposed non-contact method.

From Point Cloud To Video Projection Mapping: Knowing Modern Architecture By Using Light Projection

Abstract The ClusterLab HeModern of the Università Iuav di Venezia has been working in recent years on the study, knowledge and conservation of 20th century architecture. This interdisciplinary research group (History of Architecture, Geomatics, Building Technology, Restoration Project) intends to investigate how to analyse and evaluate the state of conservation of the materials of which the modern architectural cultural heritage is composed by identifying specific application protocols for intervention, preservation and valorisation. In 2018, the collaboration between the above-mentioned ClusterLab, the LéaV of the Ecole nationale supérieure d’architecture in Versailles and the Archivio del Moderno of the Accademia di architettura in Mendrisio - Università della Svizzera italiana, culminated in the identification of the works and career of André Bloc as a case study. In the context of this study, the Tour, the Engineer’s posthumous work, was selected to serve as a sample for research on the methods of communication of the contents of the architecture, the survey procedures used and the elaborations obtained. So, after the survey campaign, which took place via topographic, laser scanning and photogrammetric methods, two different levels of restitution were conceived: the first, made according to the canonical graphic paper methods, represents the procedural and surveying information, the material characterisation and the state of decay; the second elevates the same contents by applying them to physical reality. In this phase, the research focused on the possibility of making the different projects collaborate through the technique of rapid prototyping and video projection mapping. This particular form of augmented reality was used to enrich, through the mediation of light projections, the sensory perception of the observers by adding more information and emphasising those of greatest interest, proposing an alternative way of storytelling. In fact, unlike other forms of augmented reality, in the case of video projection mapping, the observer has the possibility to interact continuously with the physical reality, whose character is static, while the transmission of data is dynamic and can range in heterogeneity. The elaborations produced were presented in form of a museum exhibit at the international conference “Arti e architettura. Il contributo di André Bloc 1950-1970”, which took place in the exhibition rooms of the Università Iuav di Venezia.

Monitoring the Geometry of Tall Objects in Energy Industry

The landscape shaped by the energy industry is rich in various slender structures, such as smokestacks, cooling towers, and others. It is thus becoming increasingly important to effectively monitor the geometrical condition of all types of such structures. Slender structures are deformed elastically under loads due to wind. A proper analysis of the changes and deformations of such structures requires a continuous ground-based measurement system which allows the movement of the structure to be measured in two horizontal directions, from a significant distance and with a possibly reduced number of stations. For this purpose, two methods were implemented: a linear terrestrial laser scanning method (TLS) and an optical, direct distance measurement method—tachymetry (TCH). The least squares method was used to fit rings on various levels of the structure and then the centers of the rings were identified. The comparison of the identified ring centers enabled the axis of the structure to be measured for deviation in two perpendicular directions. The methods were verified on actual structures: a smokestack 110 m in height, a cooling tower 60 m in height, and a wind turbine with the rotor axis at 149 m. The measurement results were compared with respect to the measurement time and the obtained accuracies at which the point locations were identified on the structure. The proposed methods are an effective tool for monitoring the condition of slender objects both during their operating life and after it. Regular monitoring of the geometric condition of slender structures in the energy industry limits the risk of major or catastrophic events, and as a result allows the safe and uninterrupted delivery of electric energy to clients.

Morphological properties of the cement skin: Understanding the effect of contact with formwork

The process of creating cement skin is very complex and depends mainly on the material from which the formwork is made. To date, the analyzes of the surface morphology of cement composites have focused mainly on the assessment of the differences between the applied methods of treatment. However, there were not any studies which comprehensively described the influence of the formwork used on the surface morphology of cement skin. For this purpose, in this study, the four most popular materials used in the formwork were used and their impact on the morphology of the surface of the cement skin was evaluated. The evaluation of this morphology was carried out using the 3D laser scanning method, which had previously been used successfully to assess the surface morphology of cement composites, such as concretes or mortars. The results obtained during the research allowed to determine the influence of the materials used in formwork on the surface morphology parameters and to assess their potential use as substrates for coatings made of epoxy based materials or cementitious composites.

Study on Surface Subsidence Characteristics Based on Three-Dimensional Test Device for Simulating Rock Strata and Surface Movement

The main functions of a three-dimensional test device for simulating rock formations and surface movement affected by underground coal mining were described in detail, and a series of similar related tests were carried out. The device consisted of an outer frame, a pressurization unit, a pulling unit, and a coal seam simulation portion. Using this test device, supported by monitoring methods such as the three-dimensional laser scanner method, a model test study on the surface subsidence characteristics caused by coal seam mining was carried out. Combined with the field measurements, the transfer law of surface subsidence caused by coal seam mining was revealed, and the whole surface subsidence response process was analyzed. The experimental results show that the subsidence caused by mining disturbances below the coal seam accounts for 79.3% of the total subsidence, which is the dominant factor of the total surface subsidence. After long-term surface observations, surface subsidence can be divided into four stages after coal mining, and the settlement value of the obvious settlement stage accounts for more than 60% of the total settlement value. The above test results fully reflect the feasibility and practicality of the three-dimensional test device to simulate rock strata and surface movement and provide a new experimental research tool that can be used to further study the surface subsidence characteristics and control caused by coal mining.

3D surface reconstruction of transparent objects using laser scanning with a four-layers refinement process.

Acquiring the 3D geometry of objects has been an active research topic, wherein the reconstruction of transparent objects poses a great challenge. In this paper, we present a fully automatic approach for reconstructing the exterior surface of a complex transparent scene. Through scanning a line laser by a galvo-mirror, images of the scene are captured from two viewing directions. Due to the light transmission inside the transparent object, the captured feature points and the calibrated laser plane can produce large number of 3D point candidates with large incorrect points through direct triangulation. Various situations of laser transmission inside the transparent object are analyzed and the reconstructed 3D laser point candidates are classified into two types: first-reflection points and non-first-reflection points. The first-reflection points means the first reflected laser points on the front surface of measured objects. Then, a novel four-layers refinement process is proposed to extract the first-reflection points step by step from the 3D point candidates through optical geometric constraints, including (1) Layer-1 : fake points removed by single camera, (2) Layer-2 : ambiguity points removed by the dual-camera joint constraint, (3) Layer-3 : retrieve the missing first-reflection exterior surface points by fusion and (4) Layer-4 : severe ambiguity points removed by contour-continuity. Besides, a novel calibration model about this imaging system is proposed for 3D point candidates reconstruction through triangulation. Compared with traditional laser scanning method, we pulled in the viewing angle information of the second camera and a novel four-layers refinement process is adopted for reconstruction of transparent objects. Various experiments on real objects demonstrate that proposed method can successfully extract the first-reflection points from the candidates and recover the complex shapes of transparent and semitransparent objects.

Ballast loading plate design and mechanical behavior of under ballast mats

Geometry of loading plate which simulates the ballast contacting interaction is the critical factor for mechanical properties and durability test of the geotextile for railway track. In this study, a ballast indentation test with 3D laser scanning method was performed to study the actual contact characteristics of the bottom of the ballast. Based on this, the existing problems of geometric-ballast-plate (GBP) of the EN standard were presented. Therefore, a new ballast loading plate, Actual Ballast Plate (ABP), was designed and verified. The mechanical behavior of under ballast mats (UBMs) with different stiffnesses were studied by applying different ballast loading plates (the ABP, GBP, and flat plate). Results demonstrated that for the GBP, the geometric characteristics of sharp corners at the bottom of the ballast were largely overlooked, resulting in smaller contact stress in the fatigue test. The ABP resulted in a better simulation of the contact characteristics and load transfer relationship of the ballast. The stiffness test with the flat plate (FP) and GBP resulted in a higher static modulus for the hard UBM because of the overestimation of the contact area between the UBM and the ballast. It is recommended that the EN standards adopt the ABP to replace the GBP for the fatigue tests of the UBMs.

Pavement Texture-Friction Relationship Establishment via Image Analysis Methods.

Pavement surface texture is one of the prevailing factors for friction realization on pavement surfaces. In this paper, an overview of pavement texture properties related to the pavement frictional response is given. Image analysis methods used for pavement texture characterization are thoroughly analyzed together with their potential for the establishment of a pavement texture–friction relationship. Digital pavement surface models derived from photogrammetry or laser scanning methods enable the extraction of texture parameters comparable to the ones acquired by common pavement surface measuring techniques. This paper shows the results of a preliminary small-scale research study of the pavement texture–friction relationship. This research was performed in a laboratory which produced asphalt samples, primarily to analyze the potential of developing a methodology for the digital pavement texture model setup. Furthermore, the relationship between selected 2D texture parameters calculated from the digital texture model and measured friction coefficient expressed as SRT value was analyzed. A significant correlation was established for standard texture indicator mean profile depth (MPD) and SRT values (R = 0.81). Other texture parameters showed moderate correlation with the frictional response of the surface, with absolute values of correlation coefficients varying from 0.7 to 0.75. A further analysis of this relationship will be performed by inclusion of other texture parameters that can be determined from the digital texture model acquired by the established methodology.

Geomechanical monitoring of pit edge massif deformations of open-pit coal mines on ground-based laser scanning

The laser scanning method, used in combination with traditional mine surveying observations, is one of the most effective and safe ways to conduct surveying and instrumental observations on deforming areas of open-pit mining facilities. The article presents the results of ground-based laser scanning of the “Haranutsky” coal pit and performs a comparative analysis to determine the deformations and displacements of the open pit side for different periods, which was performed in the RISCAN PRO environment. Digital Relief Models (DRM) were constructed to distinguish the observation cycles by colors. Based on the results of the monitoring, it was concluded that no critical displacements and deformations were detected, despite the places of small scree deposits in the rock massif, and further systematic observations were recommended.

ПРИМЕНЕНИЕ ВОЗДУШНЫХ ЛИДАРОВ В ВЫСОКОТОЧНОЙ ГРАВИРАЗВЕДКЕ (НА ПРИМЕРЕ ВОСТОЧНОГО ЗАБАЙКАЛЬЯ)

In the production of high-precision gravimetric studies at ore deposits, an important factor is the methodical correctness of the work, which directly affects the subsequent costs and life cycle of a geological exploration enterprise. It is known, that gravimetric survey, in addition to the actual stage of measurements on the ground, includes the stage of eliminating errors introduced into the measurements by external fields and objects, in particular, the terrain. Methods existing and adopted at the state level involve the use of materials from cartographic funds (topographic maps at a scale of 1:100,000 - 1:25,000 and larger). It is also allowed to use open (free) terrain models. These materials are distinguished by a common characteristic feature - the lack of detail in thedisplay of the microrelief and steep inclined surfaces (slopes, walls, faults, incisions). These elements have a significant effect on the field values, measured by gravimeters, especially when measurements, are taken at points located at a small distance from the specified forms. In addition, the existing methods do not involve calculations using digital elevation models built from initial data with a high density of elevations (with a step of a few meters or more). All this creates the prerequisites for an insufficiently complete consideration of corrections in gravimetric measurements. At the same time, the technical capabilities of modern aviation remote sensing equipment make it possible to quickly obtain a high-precision digital model of the terrain over large areas. The most accurate, versatile and promising technology in this respect is the method of airborne laser (lidar) scanning. In this paper, the authors consider a methodology for performing work using both airborne laser scanning of the relief and other types of data (topographic maps 1:25,000, open data models). As part of the research, calculations were also made of the final corrections for the influence of the terrain and a comparison of the results obtained with each other. With the help of mathematical modeling and cartographic algebra, matrices (grids) of design parameters were constructed. The results of the study are clearly demonstrated in diagrams and diagrams, substantiating and illustrating the high information content of the study

3D simulation models for developing digital twins of heritage structures: challenges and strategies

Structural vulnerability assessment of heritage structures is a pivotal part of a risk mitigation strategy for preserving these valuable assets for the nations. For this purpose, developing digital twins has gained much attention lately to provide an accurate digital model for performing finite element (FE) analyses. Three-dimensional (3D) geometric documentation is the first step in developing the digital twin, and various equipment and methodologies have been developed to facilitate the procedure. Both aerial and terrestrial close-range photogrammetry can be combined with 3D laser scanning and geodetic methods for the accurate 3D geometric documentation. The data processing procedure in these cases mostly focuses on developing detailed, accurate 3D models that can be used for the FE modeling. The final 3D surface or volumes are produced mainly by combining the 3D point clouds obtained from the laser scanner and the photogrammetric methods. 3D FE models can be developed based on the geometries derived from the 3D models using FE software packages. As an alternative, developed 3D volumes provided in the previous step can be directly imported to some FE software packages. In this study, the challenges and strategies of each step are investigated by providing examples of surveyed heritage structures.

RGBD Infant Head Reconstruction for Cranial Vault Asymmetry Estimation

We present an RGBD infant head reconstruction method with a mobile phone depth sensor on a novel dataset. Acquiring 3D models from infants enables many important medical tasks such as automatic cranial asymmetry classification for plagiocephaly therapy progress estimation. Existing methods for 3D infant head reconstruction employ synchronized multi-view configurations or hand-held laser scanning methods making their widespread employment difficult. In contrast, RGBD reconstruction methods either rely on static scenes failing on this task due to rapid infant head movements or employ dynamic methods lacking the high fidelity surface reconstructions required for accurate cranial measurements. We propose a domain-specific 3D reconstruction method augmenting static RGBD methods focusing on the rigid parts of the head and exploiting scene knowledge about the data acquisition methodology. We evaluate our approach using provided ground truth anthropometric measurements of the biparietal diameter and report competitive accuracy.

Modern methods of geotechnic – effective way of providing industrial safety in mines

Results of long term researches of scientists of Kazakh National Research Technical University (KazNRTU) on the study of geomechanical processes are considered. It is shown that the problem of controlling geomechanical processes can be solved on the basis of integrated system for geomonitoring of rock massif state, providing for comprehensive accounting and analysis of all natural and man-made factors, as well as use of developed control tools by the authors. Characteristic features of ore deposits, use of various geotechnical methods in the process of their development are analyzed. Using necessity of methods of satellite geodesy, electronic tacheometers and laser scanning for open – pit mines monitoring was revealed and substantiated. Permanent ground reference which allows to ensure speed and accuracy of centering, as well as to exclude use of tripods for installation of high-precision electronic and laser devices used for earth surface geomonitoring was developed by the authors. Firstly, particular attention is drawn to underground monitoring of deformation and rock mass destruction. Mining works experience detects main cause of massif disturbance is fracturing which is probabilistic in nature. In addition, rock blasting operations during execution of interchamber pillars (ICP) are sources of additional technological rocks fracturing, that also reduces load bearing capacity and pillars and roof stability. Secondly, during mining on chamber-and-pillar development system in mined-out chambers, repeatedly increased leading rock pressure moves between support pillars or conjunction of mine workings, which threatens with sudden roof collapse ensuing serious consequences. Therefore, to monitor roof displacement during cleaning operations, distance determination method of roof displacement has been developed and ICP, which allows operational monitoring of underground workings stability and increase safety of mining operations. Method is based on the task of tool creating that allows to constantly register roof displacement in order to timely warn of impending roof collapse and take necessary measures. Thirdly, considering that ultimate goal for all geomechanical studies is to ensure industrial safety, in order to prevent further progressive pillars destruction, composition for strengthening fractured rock mass has been developed. Composition is oriented for hardening fractured rocks in open – pit mines and hardening distructed inter-chamber pillars and ceilings in underground workings. Technical result: mining waste utilization – (mill tailings), achievement of high fluidity of solution, adhesion to rocks and strength of obtained composition. Constant monitoring of state of massif fracturing and their strengthening can significantly extend service life of pillars, increase stability of worked-out space and, thereby, ensure safety and efficiency of mining operations. The work was attended by M. B. Nurpeisova, professor of Department of Mine Surveying of Kazakh National Research University named after K. I. Satpayev, Doctor of Engineering Sciences and Sh. K. Aitkazinova, PhD doctor. The study was supported by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan, Grant No. АР08857097 Integrated Monitoring of Slow Deformation on Ground Surface in the Course of Large-Scale Mineral Mining in Kazakhstan.

Documenting historical monuments using smartphones: a case study of Fakih Dede Tomb, Konya

Cultural heritage and historical monuments are the memories of societies and enable future generations to learn about the past. However, historical monuments from the past to the present have been subjected to many destructions, natural or unnatural. Thanks to advances in technology, it is easier to document historical monuments using digital photogrammetric methods. Today, we see the methods used in documenting historical artifacts as traditional measurement, laser scanning, and photogrammetric methods or combinations of them. In this study, historical artifacts were tried to be documented through close-up photogrammetry methods, which is a sub-working area of photogrammetry, through images taken with non-metric cameras of smartphones that we use frequently in our daily lives. Planned geodesic measurement and photography should be done in order to perform three-dimensional (3D) modeling with close-up photogrammetry. During the study, the checkpoints were measured using geodesic methods on the historical monument and part of it was reserved for accuracy analysis. The tomb of Fakih Dede in Konya, which is an important point of visit in the region has been chosen.

Archaeological settlement research for the late Middle Ages in Poland

Archaeological settlement research in Poland has to date not been conducted on a large scale. The remains of medieval villages have usually been excavated when rescue works were required by construction projects – usually along the routes of planned highways. Traces of farming have been discovered only by chance, and research on the distribution of land uses has mainly been carried out by geographers. In a few cases, survey excavations of rural settlements have been carried out in the vicinity of defensive structures being investigated. In cities, even long-term studies have basically been limited to researching only the densely built-up zone, the market square, and defensive walls. Neither agricultural land owned by townsfolk nor the zones outside the city proper that they used economically have been examined. The surface research resulting from the campaign Archeologiczne Zdjęcie Polski – AZP (Polish Archaeological Record) is of little use for the late Middle Ages, firstly because artefacts from that period were not collected at the beginning of the research, and also because of a specific aspect of cultivation (fertilisation), which saw a considerable carrying of movable cultural artefacts out from built-up areas. These weaknesses resulted from various factors. First of all, there was a lack of interest in such research among not only historical preservation services but also archaeologists themselves. However, the main factor was the significant financial outlays that such research requires. Currently, archaeology has many techniques at its disposal that allow large areas to be studied and that thus allow archaeological sites to be identified and preliminarily investigated. Aerial laser scanning and ground-based geophysical methods provide much valuable data and, above all, allow places requiring excavation to be accurately identified. Unfortunately, deeming such methods to sufficiently record sites can sometimes mean that they constitute the first and only archaeological survey of a site. Then there are problems of dating such sites and, of course, we do not acquire many of the movable cultural objects that research on medieval society demands.

New Measurement Methods for Structure Deformation and Objects Exact Dimension Determination

The current rapid development of technologies enables new procedures for deformation and the detecting of construction defects and their modelling and monitoring in BIM. New instruments were developed for fast and sufficiently accurate mapping like personal mobile laser scanners (PLS). In the world of photography, the size of camera sensors is bigger, and the photographs are sharper. The rapid development of computer performance enables automatic and complex calculations, which lead to large sets of detailed 3D data and a high degree of automation. This influences photogrammetry and its methods. The results are more detailed and more accurate. Deformation, defects and exact dimensions (metrology) of different structures or objects can be currently measured by digital close-range photogrammetry. Cracks and cavities are monitored for structure status detection. This is important for planning reconstruction and for financial reasons. For structures like cooling towers, chimneys, or bridges can be created on a 3D model with a high texture resolution for finding and monitoring cracks and cavities. Deformations or defects that were found must be in scale, and measurable for the calculation of the scope of repair work and its price. The generated 3D object model can then be used for further measurements, for the price estimation of renovation, and for the creation of a BIM, in which all processes can be modelled and watched. Deformation can be monitored over time by creating additional models after a defined period. Captured 3D models from different periods can be compared in software like CloudCompare to determine the progress of degradational changes. The trend of the aging of the structure can be traced, which will be helpful for the reasonable planning of reconstruction. Based on the rapid development and miniaturization of measuring devices, new, smaller, easier to use, and more perfect devices are constructed. This also applies to the new group of laser scanners constructed for basic measurement and structure modeling for BIM. Conventional laser scanners can be accurate, but they are relatively large and heavy, difficult to transport and measuring with them is relatively slow (stop and go type). If the project goal is the classic construction, documentation of the object, data transfer to BIM or basic documentation of objects, PLS is the ideal device. Thanks to the development of accurate IMU (inertial measurement unit) and SLAM (simultaneous localization and mapping) technologies, these devices are on the rise. The forthcoming article will inform about the methods of accurate close-range photogrammetry and mobile laser scanning and will show their advantages with specific examples.

Application of laser scanning technologies in territorial planning in Russia

Spatial planning affects all aspects of human activities. Spatial planning has a rich history; not all urban plans were correctly designed. Improper urban planning has led to various negative consequences. It is difficult to correct this situation at this stage, but design errors could have been prevented at the territory planning stage, using airborne laser scanning technology and predicting urban development trends. This method has appeared recently but proved to be efficient. Airborne laser scanning is effective as it simplifies work, reduces shooting time and costs. Besides, the method of airborne laser scanning makes it possible to survey hard-to-reach regions where terrestrial laser scanning is impossible or requires high costs and labor intensity. Airborne laser scanning facilitates the creation of electronic maps, plans, and diagrams.