Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Earthworks" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Reinterpretation of ‘Sacred Space’ at The Newark Earthworks and Serpent Mound: Settler Colonialism and Discourses of 'Sacred'
Autorzy:
Garner, Sandra
Powiązania:
https://bibliotekanauki.pl/articles/27177601.pdf
Data publikacji:
2023
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
Mounds
Earthworks
Sacred Sites
World Heritage
Settler-colonialism
Opis:
Mound-building was a preoccupation for the original, Indigenous occupants of the eastern portion of North America for at least six centuries. The efforts, from small to monumental, reflect a precision, often reflecting astronomical phenomena and are proliferated across the region. Today many remnants of these extraordinary efforts remain despite the systems of erasure that are characteristic of settler colonialism. Two such sites are the focus of this paper: the Newark Earthworks and Serpent Mound. Both sites are short-listed for UNESCO World Heritage status. Newark, Hopewell, and Serpent are all names given by dominant culture with no relation to the Indigenous architects and builders. They endure and resist, despite a long and complicated history of dominance. This paper offers a brief historical contextualization to demonstrate the ramifications of settler colonialism, which ruptured connections between Indigenous people and this land while simultaneously reinterpreting the sites as distinctly American. This lays a foundation for the web of narratives refashioned and recirculated in today’s contest over World Heritage status. Central to these narratives is ascribing the label of “sacred” to the sites and the vast number of constituents who claim “ownership” of them, including both local and global governmental agencies, historical societies, Native peoples, academics, and golfers. Furthermore, we can include those with religious and/or spiritual claims to the mounds such as the Mormons, new-agers, fundamentalist Christians, and contemporary Native tribes. Many of these stakeholders have come together to work toward the coveted World Heritage Status. But, if and when that happens, whose story will dominate? Who will make decisions? Whose voice will be heard?
Źródło:
Review of International American Studies; 2023, 16, 1; 87-114
1991-2773
Pojawia się w:
Review of International American Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating the applicability of unmanned aerial vehicles (uav) photogrammetry for the estimation of the volume of stockpiles
Autorzy:
Ajayi, Oluibukun Gbenga
Ajulo, John
Powiązania:
https://bibliotekanauki.pl/articles/1050771.pdf
Data publikacji:
2021-03-31
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
stockpiles
earthworks
volumetric computations
ground survey
UAV photogrammetry
Opis:
Accurately estimating the volume of earthworks is very important in mining engineering and construction. This estimation can be difficult because of the morphological condition of the stockpiles, hence, devising simpler, yet accurate methods of stockpile volume estimation is still a research problem in mining. Two non-invasive survey methods were compared in this research: the conventional ground-based and UAV-approach, for the survey of a twin-stockpile of gravel using Leica TS06 Total Station and DJI Mavic Air UAV, respectively. About 128 images of the area were acquired at 50 m flying height and 75% overlap during the flight mission. The images were processed using Agisoft Metashape Pro; a digital photogrammetric software, and the DEM obtained was used for the volume estimation. The total station data was also processed in ArcGIS to generate a TIN-model from which the volume was also estimated. The volume estimated from the TIN-model was compared with the volume estimated from the UAV-based DEM, using the volume obtained from the mill-machine as the standard. The obtained result shows that while 2750 m³ was obtained as the cumulative volume from the mill machine, the UAV approach yielded 2686.252 m³ and the ground survey approach gave 2830.713 m³. The percentage difference between the two methods compared to the actual volume is 2.94% and −2.31%, respectively. These results, and the result of the processing time analysis show that UAV approach is both accurate and time economical, which attests to the potentials of low-cost UAVs to provide robust alternative to the time-consuming and rigorous ground survey approach.
Źródło:
Quaestiones Geographicae; 2021, 40, 1; 25-38
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of compaction, reinforcement and reclamation as a protection of slopes against erosion in road engineering earthworks
Wpływ zagęszczenia, umacniania i rekultywacji jako zabezpieczenie antyerozyjne skarp w drogowych robotach ziemnych
Autorzy:
Piechowicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/2084073.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
road engineering
earthworks and reclamation
geotechnic
road slopes
pratotechnic
Opis:
The development of building engineering, both transport, hydrotechnical and industrial as well as housing induces the growth of the volume of earth mass at the building sites, which cause the need for a proper protection against destructive influence of water from precipitation and snow melting. The increase of the volume of earth works directly influences their technology, characterized with translocation of large amounts of mass. The paper presents characteristics of reclamation and earth works with emphasis on preparing escarps of earth buildings to their natural finishing.
Źródło:
Acta Scientiarum Polonorum. Architectura; 2021, 20, 4; 75-83
1644-0633
Pojawia się w:
Acta Scientiarum Polonorum. Architectura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The study of local terrain modeling methods for vertical planning of the territory
Autorzy:
Trevoho, Ihor
Ostrovskiy, Apollinariy
Kolb, Ihor
Ostrovska, Olena
Zhyvchuk, Viacheslav
Powiązania:
https://bibliotekanauki.pl/articles/24526020.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
modelowanie terenu
triangulacja laserowa
zdjęcie lotnicze
DEM
RMSE
vertical planning
volume of earthworks
TIN
Opis:
This work aims to study the vertical planning method for the terrain area as part of the process of construction geodetic support. Such planning will be carried out based on the aerial survey data from UAVs, which allow the creation of a high-quality digital elevation model (DEM) with sufficient node density for reliable surface terrain modelling. During the study, we test the hypothesis of the possibility of using archival aerial photographs from UAVs to model the terrain of the local area. Both the actual achievable accuracy of terrain modeling in the course of photogrammetric processing of archived aerial photographs, and methods for creating a polygonal terrain model using input spatial data in the form of clouds of 3D points of a given density require analysis. To do this, we will perform comparisons of the accuracy of calculating earth masses, carried out based on the digital triangulation elevation models (TIN). These models were based on different algorithms for creating Delaunay triangulation with different degrees of 3D point sparsity.We proposed to use sparsity of dense clouds of points representing the surface of the terrain and which were obtained by the photogrammetric method. Computer terrain modelling and calculation of vertical planning parameters were performed by us for the area with flat terrain at angles up to 3.5 degrees. We evaluated the potential of archived UAV aerial photographs and algorithms for creating Delaunay triangulation at different densities of its nodes for calculating the volumes of earth masses.
Źródło:
Geodesy and Cartography; 2021, 70, 2; art. no. e09
2080-6736
2300-2581
Pojawia się w:
Geodesy and Cartography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a UAV-based system for the semi-automatic estimation of the volume of earthworks
Autorzy:
Ajayi, Oluibukun G.
Oyeboade, Timothy O.
Samaila-Ija, Hassan A.
Adewale, Taiwo J.
Powiązania:
https://bibliotekanauki.pl/articles/1444927.pdf
Data publikacji:
2020
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
Unmanned Aerial Vehicle
earthworks
stockpile volume estimation
spatial data
Digital Elevation Model
bezzałogowy statek powietrzny
roboty ziemne
dane przestrzenne
cyfrowy model wysokości
Opis:
One of the challenges faced by surveyors in acquisition of accurate spatial data for mining applications is the risk involved in acquiring data in rugged terrains and difficult or inaccessible areas. With the advent of modern technology, accurate geospatial data can now be safely obtained for proper mining documentation periodically. The use of Unmanned Aerial Vehicles (UAVs) for data acquisition in mine surveying has been a viable means of obtaining reliable geospatial data rapidly and efficiently. The main goal of this study is to develop a semi-automatic UAV-based system for the acquisition of spatial data required for the estimation of the volume of earthworks. A DJI Phantom 4 quadcopter was used for the acquisition of image data of the project site, while the images were processed into a Digital Elevation Model (DEM) using Pix4Dmapper v2.0.1, which was then imported into the MATLAB-based system developed for the automatic estimation of the volume of earthworks. The volume obtained from the automated system was thus compared with the volume obtained directly from the Pix4Dmapper software, having specified a contour interval of 1 and an allowable error rate of ±3% as the standard error. While ±1.02% error was observed in the volume estimated using the Pix4Dmapper, the developed automated system yielded an estimated precision of ±0.81% in its volume estimation, which proves to be more robust for automatic volume estimation in terms of accuracy and precision.
Źródło:
Reports on Geodesy and Geoinformatics; 2020, 110; 21-28
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies