Three-Dimensional Quantification of Intercropping Crops in Field by ground and aerial photography

2018 ◽  
Author(s):  
Binglin Xhu ◽  
Fusang Liu ◽  
Yingpu Che ◽  
Fang Hui ◽  
Yuntao Ma
Keyword(s):  
Aerial Photography ◽  
Three Dimensional

Three-dimensional description of scenes observed in aerial photography

1995 ◽  
Vol 28 (7) ◽  
pp. 931-947 ◽  
Author(s):  
Michel Jordan ◽  
Jean-Pierre Cocquerez
Keyword(s):  
Aerial Photography ◽  
Three Dimensional

scholarly journals ON THE PROBLEM OF USING SOME NEW METHODS FOR DOCUMENTING ROCK ART

2019 ◽  
Author(s):  
А.Е. Гринько ◽  
К.В. Кирилова
Keyword(s):  
Aerial Photography ◽  
Rock Art ◽  
Three Dimensional ◽  
Field Trips ◽  
Gis Technologies ◽  
New Methods ◽  
Modern Methods ◽  
Digital Methods

Исследование памятников наскального искусства неразрывно связано со способами их документирования, которые являются основой для интерпретации изображенного и позволяют избежать безвозвратной утраты памятника. В статье рассмотрены некоторые современные методы документирования наскальных изображений и представлены примеры новейших проектов, демонстрирующих возможности данных методов. Это фотограмметрия, трехмерное сканирование и моделирование, картографирование с использованием ГИС-технологий, аэрофотосъемка с беспилотных летательных аппаратов. Все эти методы, применяемые при изучении памятников наскального искусства, дают исследователю возможность по-новому взглянуть на уже известные материалы и открыть новые. Современные цифровые методы обладают большей точностью и позволяют достичь эффекта использования микроскопа при отсутствии необходимости длительных полевых выездов. Studying rock art sites is inextricably connected to the methods of documentation, which are the basis for the interpretation of the imagery and at the same time it enables us to avoid the irretrievable loss of the sites. The authors consider some modern methods of non-contact documentation of rock art and present some examples of the latest projects which demonstrate the capabilities of these methods. These are photogrammetry, three-dimensional scanning and modeling, mapping using GIS technologies and aerial photography. All these methods when used for the study of rock art sites, give the researcher an opportunity to take a fresh look at the known materials and to discover new ones. Modern digital methods have greater accuracy and allow achieve the effect of using a microscope in the absence of the need for long field trips.

scholarly journals RESEARCH ON THE MAPPING OF LARGE-SCALE TOPOGRAPHIC MAPS BASED ON LOW-ALTITUDE DRONE AERIAL PHOTOGRAPHY SYSTEM

2020 ◽  
Vol XLII-3/W10 ◽  
pp. 623-628
Author(s):  
R. S. Lu
Keyword(s):  
Aerial Photography ◽  
Large Scale ◽  
Control Point ◽  
Three Dimensional ◽  
Operator Method ◽  
Image Data ◽  
Aerial Survey ◽  
Least Square ◽  
Image Feature

Abstract. The field data collection and in-house data processing of the aerial photography system of the uavouring aircraft are studied, combined with their working examples in this paper. The aerial survey of the Bowen School of Management of Guilin University of Technology is carried out by using the Southern Sky Patrol AS1200 aerial survey system, and the obtained data is processed and studied in the internal and external industry. In order to successfully complete this research, this article (1) first of all to the external industry collected data inspection, that is, the quality of the aircraft film inspection, the main content of the inspection is the detection of the image of the tone, resolution, level, whether the film can clearly identify the main objects, such as houses, roads, etc. can be clearly identified; - Whether the film is ghosting, whether there is misalignment and fuzziness, etc. , if the film has blurred or other quality problems, it is necessary to carry out retest or retest, this step is mainly to ensure the quality of research data, for the industry processing data to do a basic guarantee. (2) For the processing of in-house data, this paper uses a correction model for image data distortion pre-processing, the method of arithmetic and the edge detection operator method of extracting the image feature, and the image matching method Greenfeld-Schenk method based on the feature, Bamard-Thompson method and jump method and other methods to match the image, at the same time, this paper also takes the aerial triangulation method of the processing of internal data, complete the measurement control point encryption work, so as to calculate the spatial coordinates of the encryption control point, reduce the field laying work like control points, and thus reduce the working time of the field. (3) For improving the accuracy of the topographic elevation point in the aviation area, this paper uses polymorphic curve to be legal, using the field elevation measured value of the checkpoint and the three-dimensional measurement value does not match the difference, using the least square-by-multiply method to fit, so that the elevation checkpoint curve fitting value change and the actual difference is the smallest, with the measurement area elevation accuracy.

scholarly journals AN EXPERIMENT ON FORMATION OF A SPATIAL BASIS FOR THREE-DIMENSIONAL MODELING OF TERRITORY

2020 ◽  
Vol 6 (2) ◽  
pp. 152-157
Author(s):  
Aylash A. Shannaa ◽  
Ekaterina N. Kulik
Keyword(s):  
Aerial Photography ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Technological Scheme ◽  
Terrain Model ◽  
Three Dimensional Modeling ◽  
Digital Terrain ◽  
Dimensional Modeling

The article discusses the technology for creating the spatial basis of a digital terrain model, the data for which was obtained by aerial photography of the territory. Also, as part of the study, the technological scheme of the stereophotogrammetric method was analyzed and its practical testing was carried out.

APPLICATION OF AERIAL PHOTOGRAPHY RESULTS, OBTAINED USING UAV DATA TO ESTIMATE THE RESIDUAL CAPACITY OF THE LANDFILL. PRACTICE OF THE REPUBLIC OF TATARSTAN

2021 ◽  
Vol 31 (4) ◽  
pp. 404-415
Author(s):  
L.G. Akhmetzyanova ◽  
B.M. Usmanov ◽  
R.S. Kuz’min ◽  
A.M. Gafurov ◽  
V.V. Sirotkin ◽  
...  
Keyword(s):  
Aerial Photography ◽  
Three Dimensional ◽  
Unmanned Aircraft ◽  
Actual State ◽  
Active Monitoring ◽  
Satellite Navigation System ◽  
Residual Capacity ◽  
The Difference ◽  
The Republic ◽  
Project Data

Assessment of the current residual capacity is a fundamentally important task, the solution of which is demonstrated on a landfill located in the Republic of Tatarstan. To solve the task, the modern methods of high-precision three-dimensional reconstruction were used based on the survey from an unmanned aircraft DJI Phantom 4, equipped with a global satellite navigation system (GNSS) receiver. As a result of combining the project data and data from field surveys into one coordinate system and elevations and reconstruction of designed underground and ground parts of landfill calculation, the difference of models and the residual capacity of the landfill becomes possible. Based on the materials considered as of July 2020, the residual capacity of the studied landfill is 41.2 % of the project capacity, which allows us to continue to operate this landfill. The proposed approach allows for rapid and high-quality active monitoring of the engineered facility. Photogrammetric processing of the results of low-altitude aerial photography makes it possible to obtain objective data on the current actual state of the landfills, to carry out competent and valid management of the landfill functioning. Significant, this will extend the landfill's lifetime, minimize the adverse effects on the environment and predict the yield to the project capacity much more accurately.

scholarly journals Participatory Mapping of Mid-Holocene Anthropogenic Landscapes in Guyana with Kite Aerial Photography

2020 ◽  
pp. 1-15
Author(s):  
Isaac Shearn ◽  
Michael J. Heckenberger
Keyword(s):  
Aerial Photography ◽  
Late Holocene ◽  
Cultural Practices ◽  
Three Dimensional ◽  
Indigenous Communities ◽  
Ceramic Technology ◽  
Anthropogenic Landscapes ◽  
Mound Construction ◽  
Terra Preta ◽  
Landscape Domestication

The nature and degree of human modifications of humid tropical forests in Amazonia have been widely debated over the past two decades. Many regions provide significant evidence of late Holocene anthropogenic influence by settled populations, but the antiquity of human interventions is still poorly understood due to a lack of earlier archaeological sites across the broad region, particularly pertaining to the mid-Holocene. Here we report on Amerindian occupations spanning the period from ca. 6000-3000 BP along the middle Berbice River, Guyana, including early evidence in Amazonia of cultural practices widely considered indicative of settled villages, notably terra preta or “black earth” soils, mound construction, and ceramic technology. These more settled occupations of the mid-Holocene initiated a trajectory of landscape domestication extending into historical times, including larger-scale late Holocene social formations. Collaborative research with local indigenous communities, including archaeological excavations, landscape mapping using kite based aerial photography, and three-dimensional photogrammetry, was designed to promote the decolonization of archaeological knowledge production and encourage indigenous ownership of Amerindian history and cultural heritage in Guyana.

Researching the accuracy of determining spatial coordinates through processing images from drones

2021 ◽  
Vol 967 (1) ◽  
pp. 45-55
Author(s):  
V.M. Bezmenov ◽  
K.I. Safin
Keyword(s):  
Mean Square Error ◽  
Aerial Photography ◽  
Three Dimensional ◽  
Building Structure ◽  
Mean Square ◽  
Structure Model ◽  
Spatial Coordinates ◽  
Linear Elements ◽  
The Mean ◽  
Navigation Equipment

The authors present the results of numerical experiments aimed to determine the mean square error, which can be used to obtain the spatial coordinates of the object’s under study points through processing images obtained from UAVs using only on-Board global satellite and inertial navigation equipment on drones. At those experiments, aerial photography from the UAVs was modeled for mapping and solving the engineering task of creating a three-dimensional building (structure) model. A pair of images was simulated for the research. The results using the characteristics of the GNSS inertial solutions Trimble АРХ-15 UAV and Trimble АРХ-20 UAV are presented. The experiments show that at solving engineering tasks under conditions corresponding to an arbitrary case of aerial photography, in order to determinie the spatial coordinates with the mean square error not more than 15 mm, the same error of determining the linear elements of external orientation should be 2–5 mm, and the angular elements 10–20ʺ. This significantly exceeds the characteristics corresponding to the post-processing mode for the specified GNSS-inertial solutions. The authors show the effect of angular elements’ external orientation errors to resulting the mean square error of each coordinate and a possible approach to reducing it.

Ur: Empire, Modernity, and the Visualization of Antiquity Between the Two World Wars

2019 ◽  
Vol 145 (1) ◽  
pp. 129-151 ◽  
Author(s):  
Billie Melman
Keyword(s):  
Material Culture ◽  
British Empire ◽  
Aerial Photography ◽  
Three Dimensional ◽  
Black And White ◽  
History Of ◽  
Place Of Origin ◽  
Rich Material ◽  
A Site ◽  
Southern Iraq

This article explores the multiple visual presences of antiquity in the first half of the twentieth century and connects visual histories to the history of empires. It shows how archaeology mediated between the newly discovered material civilizations of the ancient Mesopotamian empires and experiences of modernity in the British Empire, the world’s largest modern empire. The article demonstrates how the materiality of antiquity enabled its visualization in a variety of forms, from illustrations through black-and-white and color photography to aerial photography, and in three-dimensional reconstructions in museums. The article focuses on the spectacular archaeological discoveries at Ur, Tell Al-Muqayyar, in Southern Iraq, which exposed to mass audiences the unknown Sumerian culture. Ur was represented and constructed as the place of origin of monotheism, a site of a rich material culture, and, at the same time, as barbarous.

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