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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Ecology and Life Safety</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Ecology and Life Safety</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Экология и безопасность жизнедеятельности</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-2310</issn><issn publication-format="electronic">2408-8919</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">27352</article-id><article-id pub-id-type="doi">10.22363/2313-2310-2020-28-4-381-396</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Environmetal defence</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Защита окружающей среды</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Assessing the georeferencing accuracy of different amount of image stripes for linear UAV projects</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка точности геопозиционирования снимков в линейных проектах при различном количестве маршрутов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0668-2375</contrib-id><name-alternatives><name xml:lang="en"><surname>El Sheshtawy</surname><given-names>Amr Mahmoud</given-names></name><name xml:lang="ru"><surname>Елшештави</surname><given-names>Амр Махмуд</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD student, Department of Remote Sensing and Digital Cartography, State University of Land Use Planning; teacher, Civil Engineering Department, Faculty of Engineering in Cairo, Al-Azhar University</p></bio><bio xml:lang="ru"><p>аспирант, кафедра дистанционного зондирования и цифровой картографии, Государственный университет по землеустройству; преподаватель, кафедра гражданского строительства, инженерный факультет в Каире, Университет Аль-Азхар</p></bio><email>amrshesht82@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4382-5200</contrib-id><name-alternatives><name xml:lang="en"><surname>Limonov</surname><given-names>Anatoly N.</given-names></name><name xml:lang="ru"><surname>Лимонов</surname><given-names>Анатолий Николаевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Associate Professor, Professor, Department of Remote Sensing and Digital Cartography</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент, профессор, кафедра дистанционного зондирования и цифровой картографии</p></bio><email>limonov.anatoly@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7095-3224</contrib-id><name-alternatives><name xml:lang="en"><surname>Gavrilova</surname><given-names>Larisa A.</given-names></name><name xml:lang="ru"><surname>Гаврилова</surname><given-names>Лариса Анатольевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Associate Professor, Dean, Faculty of Urban Cadaster</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент, декан, факультет городского кадастра</p></bio><email>gavrilova.a.larisa@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8367-207X</contrib-id><name-alternatives><name xml:lang="en"><surname>Elshewy</surname><given-names>Mohamed A.</given-names></name><name xml:lang="ru"><surname>Елшеви</surname><given-names>Мохамед Абделвадод</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD student, Department of Geodesy and Geoinformatics, State University of Land Use Planning; teacher, Civil Engineering Department, Faculty of Engineering in Cairo, Al-Azhar University</p></bio><bio xml:lang="ru"><p>аспирант, кафедра геодезии и геоинформатики, Государственный университет по землеустройству; преподаватель, кафедра гражданского строительства, инженерный факультет в Каире, Университет Аль-Азхар</p></bio><email>mimoelshewy@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">State University of Land Use Planning</institution></aff><aff><institution xml:lang="ru">Государственный университет по землеустройству</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Al-Azhar University</institution></aff><aff><institution xml:lang="ru">Университет Аль-Азхар</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2020</year></pub-date><volume>28</volume><issue>4</issue><issue-title xml:lang="en">VOL 28, NO4 (2020)</issue-title><issue-title xml:lang="ru">ТОМ 28, №4 (2020)</issue-title><fpage>381</fpage><lpage>396</lpage><history><date date-type="received" iso-8601-date="2021-09-04"><day>04</day><month>09</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, El Sheshtawy A.M., Limonov A.N., Gavrilova L.A., Elshewy M.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Елшештави А.М., Лимонов А.Н., Гаврилова Л.А., Елшеви М.А.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">El Sheshtawy A.M., Limonov A.N., Gavrilova L.A., Elshewy M.A.</copyright-holder><copyright-holder xml:lang="ru">Елшештави А.М., Лимонов А.Н., Гаврилова Л.А., Елшеви М.А.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/ecology/article/view/27352">https://journals.rudn.ru/ecology/article/view/27352</self-uri><abstract xml:lang="en"><p style="text-align: justify;">At present, the results of photogrammetric processing of images obtained from UAVs (orthophoto mosaics, digital elevation models, etc.) are widely used for environmental studies. Such materials are especially relevant and in demand for environmental monitoring of hard-to-reach objects. In addition, UAV survey materials are indispensable for impact monitoring, in which observation, assessment and forecast of the state of the natural environment in areas where hazardous and potentially hazardous (NPP) sources of anthropogenic impact are located are carried out. Regardless of the method of georeferencing of images - direct or indirect - the accuracy of the generated product is evaluated by ground control points. The purpose of this study is to assess the accuracy of photogrammetric constructions depending on the number of strips when surveying linear objects from UAVs and on the number of control points used in indirect georeferencing. Five groups of experiments were carried out during the study, three in each group with a different number of strips (from one to three). Five groups are conventionally combined into two sections. In the first section, direct and indirect georeferencing techniques were used with three locally located control points. In the second section, the method of indirect georeferencing was used with a different number of ground control points: six, twelve and thirty-four. Estimates of the accuracy of various tests have shown that an increase in the number of strips does not always lead to an increase in accuracy.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">В настоящее время для экологических исследований широко используются результаты фотограмметрической обработки снимков, полученных с беспилотных летательных аппаратов (БПЛА), - ортофотопланы, цифровые модели рельефа и т. п. Такие материалы особенно актуальны и востребованы при экологическом мониторинге труднодоступных объектов. Кроме того, материалы съемки с БПЛА незаменимы при импактном мониторинге, когда проводятся наблюдение, оценка и прогноз состояния природной среды в районах расположения опасных и потенциально опасных (АЭС) источников антропогенного воздействия. Независимо от способа геопозиционирования снимков - прямого или косвенного - оценка точности созданного продукта выполняется по наземным контрольным точкам. Цель исследования - оценить точность фотограм-метрических построений в зависимости от количества маршрутов при съемке с БПЛА линейных объектов и от количества опорных точек, используемых при косвенном геопозиционировании. Проведено пять групп экспериментов по три в каждой группе с различным количеством маршрутов (от одного до трех). Пять групп условно объединены в две секции. В первой секции использовались методы прямого и косвенного геопозиционирования с тремя локально расположенными опорными точками. Во второй секции использовался метод косвенного геопозиционирования с различным количеством опорных точек: шестью, двенадцатью и тридцати четырьмя. Оценки точности различных тестов показали, что не всегда увеличение количества маршрутов ведет к повышению точности.</p></trans-abstract><kwd-group xml:lang="en"><kwd>unmanned aerial vehicles</kwd><kwd>single-strip aerial survey</kwd><kwd>two-strip aerial survey</kwd><kwd>direct georeferencing</kwd><kwd>indirect georeferencing</kwd><kwd>ground control points</kwd><kwd>georeferencing accuracy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>беспилотные летательные аппараты</kwd><kwd>одномаршрутная аэросъемка</kwd><kwd>двухмаршрутная аэросъемка</kwd><kwd>прямое геопозиционирование</kwd><kwd>косвенное геопозиционирование</kwd><kwd>наземные контрольные точки</kwd><kwd>точность геопозиционирования</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Shahbazi M, Théau J, Ménard P. Recent applications of unmanned aerial imagery in natural resource management. Gisci. 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