scholarly journals Implementation of engineering and geodetic works in the framework of research work, which are aimed at developing proposals for the development of settlements of the municipality

2021 ◽  
Vol 937 (4) ◽  
pp. 042067
Author(s):  
O Germak ◽  
O Gugueva ◽  
N Kalacheva
Keyword(s):  
Laser Scanning ◽  
Research Work ◽  
Image Resolution ◽  
Survey Method ◽  
Digital Terrain ◽  
Terrain Models ◽  
Airborne Laser ◽  
Planning Project ◽  
High Image Resolution ◽  
Difficult Terrain

Abstract At any stage of urban planning activities, it may be necessary to plan the territory. The territory planning project can be created on topographic plans of a scale of 1: 2000. Modern needs for cadastre maintenance, land management, and design of territories require high quality topographic material obtained in almost real time with high image resolution. This problem is effectively solved by aerial photography from unmanned aerial vehicles (UAVs). Airborne laser scanning allows you to survey difficult terrain and large areas. To clarify the position of some terrain objects, a GNSS survey in RTK mode was used. The combined survey method provides the necessary accuracy of surveying the situation and the terrain, the measurement accuracy corresponds to the possibility of creating engineering-topographic plans at a scale of 1: 2000. In the course of the work, engineering digital terrain models and orthophotomaps were formed. Based on the data obtained, a digital topographic plan of 1: 2000 scale was compiled.

scholarly journals Accuracy Assessment of Point Clouds from LiDAR and Dense Image Matching Acquired Using the UAV Platform for DTM Creation

2018 ◽  
Vol 7 (9) ◽  
pp. 342 ◽  
Author(s):  
Adam Salach ◽  
Krzysztof Bakuła ◽  
Magdalena Pilarska ◽  
Wojciech Ostrowski ◽  
Konrad Górski ◽  
...  
Keyword(s):  
Land Cover ◽  
Laser Scanning ◽  
Point Clouds ◽  
Data Sources ◽  
Digital Terrain Models ◽  
Vegetation Height ◽  
Digital Terrain ◽  
Terrain Models ◽  
Airborne Laser ◽  
Vertical Accuracy

In this paper, the results of an experiment about the vertical accuracy of generated digital terrain models were assessed. The created models were based on two techniques: LiDAR and photogrammetry. The data were acquired using an ultralight laser scanner, which was dedicated to Unmanned Aerial Vehicle (UAV) platforms that provide very dense point clouds (180 points per square meter), and an RGB digital camera that collects data at very high resolution (a ground sampling distance of 2 cm). The vertical error of the digital terrain models (DTMs) was evaluated based on the surveying data measured in the field and compared to airborne laser scanning collected with a manned plane. The data were acquired in summer during a corridor flight mission over levees and their surroundings, where various types of land cover were observed. The experiment results showed unequivocally, that the terrain models obtained using LiDAR technology were more accurate. An attempt to assess the accuracy and possibilities of penetration of the point cloud from the image-based approach, whilst referring to various types of land cover, was conducted based on Real Time Kinematic Global Navigation Satellite System (GNSS-RTK) measurements and was compared to archival airborne laser scanning data. The vertical accuracy of DTM was evaluated for uncovered and vegetation areas separately, providing information about the influence of the vegetation height on the results of the bare ground extraction and DTM generation. In uncovered and low vegetation areas (0–20 cm), the vertical accuracies of digital terrain models generated from different data sources were quite similar: for the UAV Laser Scanning (ULS) data, the RMSE was 0.11 m, and for the image-based data collected using the UAV platform, it was 0.14 m, whereas for medium vegetation (higher than 60 cm), the RMSE from these two data sources were 0.11 m and 0.36 m, respectively. A decrease in the accuracy of 0.10 m, for every 20 cm of vegetation height, was observed for photogrammetric data; and such a dependency was not noticed in the case of models created from the ULS data.

scholarly journals Airborne laser scanning and usefulness for hydrological models

2005 ◽  
Vol 5 ◽  
pp. 57-63 ◽  
Author(s):  
M. Hollaus ◽  
W. Wagner ◽  
K. Kraus
Keyword(s):  
Laser Scanning ◽  
Laser Scanner ◽  
Airborne Laser Scanning ◽  
Scanner Data ◽  
Digital Terrain Models ◽  
Mountainous Regions ◽  
Digital Terrain ◽  
Terrain Models ◽  
Airborne Laser ◽  
Land Cover Maps

Abstract. Digital terrain models form the basis for distributed hydrologic models as well as for two-dimensional hydraulic river flood models. The technique used for generating high accuracy digital terrain models has shifted from stereoscopic aerial-photography to airborne laser scanning during the last years. Since the disastrous floods 2002 in Austria, large airborne laser-scanning flight campaigns have been carried out for several river basins. Additionally to the topographic information, laser scanner data offer also the possibility to estimate object heights (vegetation, buildings). Detailed land cover maps can be derived in conjunction with the complementary information provided by high-resolution colour-infrared orthophotos. As already shown in several studies, the potential of airborne laser scanning to provide data for hydrologic/hydraulic applications is high. These studies were mostly constraint to small test sites. To overcome this spatial limitation, the current paper summarises the experiences to process airborne laser scanner data for large mountainous regions, thereby demonstrating the applicability of this technique in real-world hydrological applications.

scholarly journals Laser scanning applications in fluvial studies

2011 ◽  
Vol 35 (6) ◽  
pp. 782-809 ◽  
Author(s):  
Johanna Hohenthal ◽  
Petteri Alho ◽  
Juha Hyyppä ◽  
Hannu Hyyppä
Keyword(s):  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Lidar Data ◽  
Digital Terrain ◽  
Terrain Models ◽  
Airborne Laser ◽  
Mapping System ◽  
Mobile Mapping System ◽  
Set Up ◽  
Terrain Elevation

During recent decades, the use of high-resolution light detection and ranging altimetry (LiDAR) data in fluvial studies has rapidly increased. Airborne laser scanning (ALS) can be used to extensively map riverine topography. Although airborne blue/green LiDAR can also be utilized for the mapping of river bathymetry, the accuracy levels achieved are not as good as those of terrain elevation measurements. Moreover, airborne bathymetric LiDAR is not yet suitable for mapping shallow water areas. More detailed topographical data may be obtained by fixed-position terrestrial laser scanning (TLS) or mobile terrestrial laser scanning (MLS). One of the newest applications of MLS approaches involves a boat/cart-based mobile mapping system (BoMMS/CartMMS). This set-up includes laser scanning and imaging from a boat moving along a river course and may be used to expand the spatial extent of terrestrial scanning. Detailed digital terrain models (DTMs) derived from LiDAR data can be used to improve the recognition of fluvial landforms, the geometric data of hydraulic modelling, and the estimation of flood inundation extents and fluvial processes.

Interpreting cultural remains in airborne laser scanning generated digital terrain models: effects of size and shape on detection success rates

2013 ◽  
Vol 40 (12) ◽  
pp. 4688-4700 ◽  
Author(s):  
Ole Risbøl ◽  
Ole Martin Bollandsås ◽  
Anneli Nesbakken ◽  
Hans Ole Ørka ◽  
Erik Næsset ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Airborne Laser Scanning ◽  
Success Rates ◽  
Digital Terrain Models ◽  
Size And Shape ◽  
Digital Terrain ◽  
Terrain Models ◽  
Airborne Laser
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