W artykule przedstawiono proces tworzenia dokumentacji architektoniczno-budowlanej wraz z analizą ugięcia więźby dachowej zabytkowego kościoła w Magnuszewicach w oparciu o opracowane dane z naziemnego skanowania laserowego. Przedstawiono przebieg kampanii pomiarowej z wykorzystaniem skanera Faro Focus3D X130. Opracowano otrzymane chmury punktów w programie Faro Scene. Wykonano ortoobrazy z chmur punktów w formie rastrów intensywności oraz na ich podstawie sporządzono w programie AutoCAD 2018 dokumentację architektoniczno-budowlaną. W skład dokumentacji wchodziły cztery rysunki elewacji, przekrój podłużny i poprzeczny oraz rzut nawy kościoła. Ostatnim etapem tworzenia dokumentacji było zbadanie deformacji konstrukcji dachowej na podstawie sporządzonych przekrojów poprzecznych. Wyniki badania deformacji wykazywały znaczne rozbieżności na niektórych elementach konstrukcyjnych. Średnie odchylenie było wielkości kilku centymetrów, natomiast największe wyniosło 0.31 m.
EN
The article presents the process of creating architectural and construction documentation along with the analysis of the deformation of the roof truss of a historic church in Magnuszewice based on the terrestrial laser scanning data. The course of the measurement campaign using the Faro Focus3D X130 scanner was presented. The received point clouds were registered in the Faro Scene. The architectural and construction documentation prepared in AutoCAD 2018 were based on orthophotos created from point cloud. The documentation included four elevation drawings, a cross-sections and projection of the church nave. The aim of last stage was the investigation of roof structure deformation based on the prepared cross-sections. The results of the deformation test showed significant discrepancies on some structural elements. The average deviation was a few centimeters, while the largest was 31 cm.
W artykule wskazano na przydatność chmury punktów do inwentaryzacji zabytku na podstawie pierwszego na Śląsku jezuickiego kościoła (kościoła pw. Wniebowzięcia Najświętszej Marii Panny w Nysie).
EN
In the article indicated the usefulness of the cloud point to inventory heritage based on the first in Jesuit church in Silesia region (Assumption of the Blessed Virgin Mary church in Nysa).
Various sectors of the economy such as transport and renewable energy have shown great interest in sea bed models. The required measurements are usually carried out by ship-based echo sounding, but this method is quite expensive. A relatively new alternative is data obtained by airborne lidar bathymetry. This study investigates the accuracy of these data, which was obtained in the context of the project ‘Investigation on the use of airborne laser bathymetry in hydrographic surveying’. A comparison to multi-beam echo sounding data shows only small differences in the depths values of the data sets. The IHO requirements of the total horizontal and vertical uncertainty for laser data are met. The second goal of this paper is to compare three spatial interpolation methods, namely Inverse Distance Weighting (IDW), Delaunay Triangulation (TIN), and supervised Artificial Neural Networks (ANN), for the generation of sea bed models. The focus of our investigation is on the amount of required sampling points. This is analyzed by manually reducing the data sets. We found that the three techniques have a similar performance almost independently of the amount of sampling data in our test area. However, ANN are more stable when using a very small subset of points.
Underwater storage of chemical substances placed on the bottom of the Baltic Sea are a major threat to the environment and the health and life of humans. Today, not all locations of the underwater storage sites are known and worsening of their condition and the tides make a periodic monitoring of the seabed is one of the most important tasks of hydrographic authorities to guarantee the marine environment protection and the safe navigation of vessels whose collision can cause an ecological disaster. The sea bed measurements have been carried out by ship-based echo sounding, but this method is rather expensive. The goal of this paper is to examine the possibility of detection of seabed objects based on satellite imagery and airborne laser bathymetry. The first part of the publication presents the principle of bathymetric data acquisition using bathymetric laser scanner and satellite imagery processing to bathymetric data. The second part of this paper presents an analyses the ALB (Airborne Laser Bathymetry) data and bathymetric data from processed satellite imagery. A comparison to echo sounding data shows only small differences in the depths values of ALB data, more than 95% is between ± 0.5 m, but big differences in the depths values of satellite data. The results of tests to object detection are similar to difference comparison. In data from airborne laser bathymetry is possible to find the object on the sea bed, but in satellite bathymetry data it's very difficult or even impossible to detect some object. This paper presents the data and results from the project 'Investigation on the use of airborne laser bathymetry in hydrographic surveying', carried out by the German Federal Maritime and Hydrographic Agency (BSH) in cooperation with the Institute of Photogrammetry and GeoInformation, Leibniz Universität Hannover, Germany.
Okresowe monitorowanie dna morskiego jest jednym z najważniejszych zadań władz hydrograficznych. Odpowiednie pomiary, które gwarantują bezpieczną żeglugę statków są przeprowadzone za pomocą echosondy umieszczonej na statku, jednakże jest to metoda kosztowna. Publikacja prezentuje cele projektu „Badania nad wykorzystaniem lotniczego skaningu batymetrycznego w pomiarach hydrograficznych", który bada możliwości wykorzystania lotniczego skaningu batymetrycznego do monitorowania dna Morza Bałtyckiego oraz prezentuje wyniki z pierwszej kampanii. Dane z obszaru testowego z heterogeniczną głębokością wody zostały poddane analizie ze względu na gęstość chmury punktów, dokładność uzyskanych głębokości oraz wysokość lotu pozyskiwanych danych. Zgodnie z oczekiwaniami, uzyskano dobre wyniki w płytkiej wodzie do głębokości jednego Secchiego. Porównanie zebranych punktów do danych z echosondy pokazuje jedynie niewielkie różnice w głębokości.
EN
Periodic monitoring of the sea bed is one of the most important tasks of the hydrographic authorities. The corresponding measurements, which guarantee the safe navigation of ships, have been carried out by ship-based echo sounding, but this method is expensive. This paper summarizes the goals of the project Investigation on the use of airborne laser bathymetry in hydrographic surveying', which studies the opportunities of airborne laser bathymetry for monitoring of the sea bed in the Baltic Sea and presents results of the first data acquisition campaign. In a test site with heterogeneous water depths the point densities, depth accuracy and flying height are evaluated. As expected, good results for shallow water areas up to one Secchi- depth are observed. A comparison to echo sounding data shows only small differences in the depths values of both data sets.