scholarly journals Mapping Heterogeneous Buried Archaeological Features Using Multisensor Data from Unmanned Aerial Vehicles

2019 ◽  
Vol 12 (1) ◽  
pp. 41 ◽  
Author(s):  
Christopher Brooke ◽  
Ben Clutterbuck

There is a long history of the use of aerial imagery for archaeological research, but the application of multisensor image data has only recently been facilitated by the development of unmanned aerial vehicles (UAVs). Two archaeological sites in the East Midlands U.K. that differ in age and topography were selected for survey using multisensor imaging from a fixed-wing UAV. The aim of this study was to determine optimum methodology for the use of UAVs in examining archaeological sites that have no obvious surface features and examine issues of ground control target design, thermal effects, image processing and advanced filtration. The information derived from the range of sensors used in this study enabled interpretation of buried archaeology at both sites. For any archaeological survey using UAVs, the acquisition of visible colour (RGB), multispectral, and thermal imagery as a minimum are advised, as no single technique is sufficient to attempt to reveal the maximum amount of potential information.

Author(s):  
Mohammad Sarim ◽  
Alireza Nemati ◽  
Manish Kumar ◽  
Kelly Cohen

For effective navigation and tracking applications involving Unmanned Aerial Vehicles (UAVs), data fusion from multiple sensors is utilized. However, asynchronous nature of the sensors, coupled with loss of data and communication delays, makes this process not very reliable. For a better estimation of the data, some sort of filtering scheme is needed. This paper presents an Extended Kalman Filter (EKF) based quadrotor state estimation by exploiting the dynamic model of the UAV. The data coming from the sensors is noisy and intermittent. The EKF filters and provides estimated data for the missing timestamps. An indoor flight test establishes the accuracy of the EKF, and another outdoor flight test validates the developed scheme for the real world scenario.


Author(s):  
ADAM MŁYNARCZYK ◽  
SŁAWOMIR KRÓLEWICZ ◽  
PAWEŁ RUTKOWSKI

The use of unmanned aerial vehicles is becoming more and more popular for making high-altitude and orthophotomap models. In this process, series of images are taken at specific intervals, usually lasting several seconds. This article demonstrates the ability to make models and orthophotomaps from dynamic images – video recorded from UAV. The best mutual coverage of photographs was indicated (95–96%) and the photogrammetric process for joining images was presented, through the creation of a point cloud to obtain a digital terrain model and the orotfotomap. The data was processed in 150 different variants and the usefulness of this method was demonstrated. Problems and errors that may occur during the processing of recorded image data are also described.


Author(s):  
Philip Odonkor ◽  
Zachary Ball ◽  
Souma Chowdhury

From swarming locusts to schools of fish, the complex emergent behaviors exhibited by multi-agent swarm systems in nature present a compelling basis for their application towards real-world challenges. This paper capitalizes on this potential by proposing a swarm-intelligence inspired approach towards mapping complex offshore oil spills — one that uses a collaborating team of small (inexpensive) unmanned aerial vehicles. By leveraging the idea of occupancy grids, a new probability map concept is developed to enable agent-level situational awareness, while significantly reducing computing overheads (image data to intelligence generation in <1 sec) and communication overheads (< 1.7 KB of average data sharing across the swarm agents). The probability map is further exploited for waypoint planning using the principles of swarm dynamics and a rule-based reasoning approach to allow for dynamic preference shifts towards map exploitation and exploration. Detection of oil is performed by using a generalizable concept of anomaly detection that is derived from a color-based segmentation approach. Two simulated case studies, derived from actual oil spill images, are presented with results highlighting the strengths of the proposed approach.


2008 ◽  
Vol 3 (2) ◽  
Author(s):  
Himanshu Prabha Ray

This paper draws on my work on the maritime history of early South and Southeast Asia and the use of sea-lanes of the Indian Ocean by pilgrims for visits to sites associated with the life of the Buddha. A second perspective is provided by the rediscovery of Buddhism in Europe coinciding with the development of new disciplines, including archaeology. These disciplines were introduced into India with the government-sponsored Archaeological Survey of India, founded in 1871. Alexander Cunningham, the first Director-General, brought Buddhism to the forefront and established its study as a separate sub-discipline. This had far-reaching implications for the demarcation and archaeological investigation of many of the monuments linked to Buddhism, especially Bodh Gaya and Sanchi. This paper addresses the issue of the manifestation of a Buddhist identity in colonial India. It is often suggested that this identity owed its origins to the formation of the Mahabodhi Society and the emergence of nationalism in Sri Lanka. This paper examines political developments in India in the context of the Navayana or the Neo-Buddhist path, forged by B.R. Ambedkar on the 2500th anniversary of Buddha’s parinirvana, or demise, in 1956. To what extent did this newly formed identity become interlinked with the identification and control of archaeological sites in India and their redefinition? How did the renegotiation of Buddhist identity affect India’s relationship with Thailand?


Kavkaz-forum ◽  
2020 ◽  
Author(s):  
А.А. ТУАЛЛАГОВ

Статья посвящена проблеме происхождения образа осетинского Николая как представителя божественных сил осетинских традиционных представлений. Актуальность представленной в статье темы определяется возникшим дискуссионным моментом в исследовании данного божественного образа, а также методологическими подходами при его реализации. Научная новизна исследования заключается в привлечении к анализу оригинальных нарративных источников, позволяющих верифицировать источниковую базу и определиться с обоснованностью проявившихся различных подходов в решении указанной проблемы. Целью исследования является верификация данных образа одного из представителей осетинского пантеона в контексте монотеистических и политеистических представлений. При проведении исследования применялись методы текстуального исследования источников, индуктивного и логического анализа на основе принципа историзма и системности изложения. Дополнительное обращение к анализу источников, в которых фигурирует данный образ, к историографии самой проблемы позволяет автору подтвердить прежде сформулированное им положение о Николае как боге, формирование образа которого имело давние истоки. Приложение к нему отдельных черт православного св. Николая продиктовано историей христианизации Алании под византийским влиянием, процесс которого был прерван. Политеистические представления продолжали действовать в традиционных представлениях осетин конца XIX–начала XX вв. Отмечаются конкретные примеры ошибочных трактовок некоторых археологических памятников и материалов письменных источников, а также методов и подходов в критике представленных ранее автором решений. Проведенный анализ сопрягается с вопросом об оригинальных монотеистических представлениях, искусственность приложения которых в современных условиях к истории алан объективно отвергается. The article is devoted to the problem of originating of the image of the Ossetian Nicholas as a representative of the divine powers of Ossetian traditional ideas. The relevance of the topic presented in the article is determined by the discussion point that has arisen in the study of this divine image, as well as methodological approaches of its implementation. The scientific novelty of the study is to use original narrative sources for analysis, which allow us to verify the source base and determine the validity of the various approaches that have appeared in solving this problem. The aim of the study is to verify the image data of one of the representatives of the Ossetian pantheon in the context of monotheistic and polytheistic representations. The study used methods of textual research of sources, inductive and logical analysis based on the principle of historicism and systematic presentation. The extensive analysis of the sources in which this image appears, the historiography of the problem itself, allows the author to confirm his previously formulated presumption on Nicholas as a god, whose formation had long-standing origins. Applying to him the individual features of the Orthodox St. Nicholas is dictated by the history of the Christianization of Alania under Byzantine influence, the process of which was interrupted. Polytheistic ideas continued to operate in the traditional representations of the Ossetians of the late XIX–early XXth centuries. Specific examples of erroneous interpretations of certain archaeological sites and materials from written sources, as well as methods and approaches in criticizing the solutions presented earlier by the author, are noted. The analysis is combined with the question of the original monotheistic «ideas», the artificiality of their application to the history of the Alans in modern conditions is objectively rejected.


2020 ◽  
Vol 4 (4) ◽  
Author(s):  
Lingyun Li

Unmanned Aerial Vehicles (UAV) tilt photogrammetry technology can quickly acquire image data in a short time. This technology has been widely used in all walks of life with the rapid development in recent years especially in the rapid acquisition of high-resolution remote sensing images, because of its advantages of high efficiency, reliability, low cost and high precision. Fully using the UAV tilt photogrammetry technology, the construction image progress can be observed by stages, and the construction site can be reasonably and optimally arranged through three-dimensional modeling to create a civilized, safe and tidy construction environment.


Significance Earlier this month, Ukraine announced plans to buy more Bayraktars on top of those it has already purchased. The use of unmanned aerial vehicles (UAVs) in the war over Nagorno-Karabakh, which began a year ago yesterday, sparked discussion about whether this was a watershed moment in the history of warfare. Impacts UAV proliferation and use will raise liability concerns for third-party suppliers of components. Controversy around jet and missile procurement will dog Armenian politics. Russia will offer armour and electronics upgrades for its older tank models in foreign armies.


Drones ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 47 ◽  
Author(s):  
Massimo Gasparini ◽  
Juan Carlos Moreno-Escribano ◽  
Antonio Monterroso-Checa

Unmanned aerial vehicles (UAVs) and aerial photogrammetry have greatly contributed to expanding research in scientific fields that employ geomatics techniques. Archaeology is one of the sciences that has advanced most as a result of this technological innovation. The geographic products obtained by UAV photogrammetric surveys can detect anomalies corresponding to ancient settlements and aid in designing future archaeological interventions. These acquisitions also offer attractive scientific dissemination products. We present five archaeological sites from different ages located in the Guadiato Valley of Córdoba, Spain, where a series of photogrammetric images were acquired for purposes of both research and dissemination. Acquisitions were designed based on the accessibility of the sites and on the end-user experience. The results present several photogrammetric products for use in research, and the mandatory dissemination of the results of a publicly-funded research project.


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