Timofey Samsonov

Timofey Samsonov
Lomonosov Moscow State University | MSU · Department of Cartography and Geoinformatics

PhD

About

102
Publications
44,980
Reads
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364
Citations
Citations since 2017
49 Research Items
306 Citations
20172018201920202021202220230204060
20172018201920202021202220230204060
20172018201920202021202220230204060
20172018201920202021202220230204060
Additional affiliations
February 2019 - present
Lomonosov Moscow State University
Position
  • Spatial Statistics
October 2014 - present
Lomonosov Moscow State University
Position
  • Researcher
September 2014 - present
Lomonosov Moscow State University
Position
  • Cartographic Databases
Education
March 2012 - February 2015
Lomonosov Moscow State University
Field of study
  • Cartography
September 2007 - October 2010
Lomonosov Moscow State University
Field of study
  • Cartography
September 2002 - June 2007
Lomonosov Moscow State University
Field of study
  • Cartography

Publications

Publications (102)
Article
Full-text available
The study applies object-oriented analysis to the extraction of urban canyons and introduces the concept of directed urban canyon which is then being experimentally applied in urban meteorological modeling. Summary of current approaches for describing urban canyon geometry is provided. Then a new theoretical approach to canyon delineation and three...
Article
Full-text available
Line generalization is an essential data processing operation in geographic information systems (GIS) and cartography. Many point reduction and simplification algorithms have been developed for this purpose. During the last three decades, several attempts have been made to develop approaches of generalization that adapt to the geometric properties...
Article
Full-text available
Supplementary contour lines are placed between regular contour lines to visualize small but important forms that regular contour lines are unable to show. On topographic maps, typical forms are hillcrests, depressions, saddles, terraces, banks, and levees. No automated method for the selection of supplementary contour lines has been described so fa...
Article
Full-text available
Combining misaligned spatial data from different sources complicates spatial analysis and creation of maps. Conflation is a process that solves the misalignment problem through spatial adjustment or attribute transfer between similar features in two datasets. Even though a combination of digital elevation model (DEM) and vector hydrographic lines i...
Article
Full-text available
One of the key applications of digital elevation models (DEMs) is cartographic relief presentation. DEMs are widely used in mapping, most commonly in the form of contours, hypsometric tints, and hill shading. Recent advancements in the coverage, quality, and resolution of global DEMs facilitate the overall improvement of the detail and reliability...
Preprint
Full-text available
Empirical study of the isotopic features of river runoff were conducted at three hydrological posts in three different river basins: the Zakza river in the center of East European Plane (southwest of Moscow), the Dubna river (north of Moscow) and the Sosna Bystraya river in the south of central region. Samples of river water, groundwater, and preci...
Preprint
Empirical study of the isotopic features of river runoff were carried out at three hydrological posts in 3 different river basins: the Zakza river in the center of East European Plane (southwest of the Moscow), the Dubna river (north of the Moscow) and the Sosna river in the south of central region. Samples of river water, groundwater and precipita...
Article
Full-text available
Benzo[a]pyrene (BaP) is one of the priority pollutants in the urban environment. For the first time, the accumulation of BaP in road dust on different types of Moscow roads has been determined. The average BaP content in road dust is 0.26 mg/kg, which is 53 times higher than the BaP content in the background topsoils (Umbric Albeluvisols) of the Mo...
Article
Full-text available
Urban climate features such as the urban heat island (UHI) are determined by various factors characterizing the modifications of the surface by the built environment and human activity. These factors are often attributed to the local spatial scale (hundreds of meters up to several kilometers). Nowadays, more and more urban climate studies utilize t...
Patent
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The research program allows you to select the parameters of algorithms for geometric simplification of linear objects to obtain generalized lines that are similar in detail.
Article
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The article is devoted to the problem of evaluating the detailing of spatial data. In geoinformatics, spatial data detailing determines how detailed a particular object is representeda map image, and the detail score allows you to analyze the permissible accuracy of spatial objects for a specific user task. An approach to the definition of detailin...
Article
Full-text available
The paper reveals dependencies between the character of the line shape and combination of constraining metrics that allows comparable reduction in detail by different geometric simplification algorithms. The study was conducted in a form of the expert survey. geometrically simplified versions of three coastline fragments were prepared using three d...
Article
Full-text available
Comfort indices are used to assess the harm to human health caused by unfavorable thermal conditions. All calculated indices are based on both meteorological and physiological parameters. An algorithm is used which is based on a model RayMan for calculating two of the most common thermal indexes: PET and UTCI, which are based on a balance of human...
Article
Full-text available
This study considers experience in use of crowdsourced meteorological observations from the world’s biggest network of citizen weather stations (CWSs), Netatmo, for urban climate research and applied monitoring services on the example of Moscow megacity. Crowdsourcing paradigm is an emerging alternative to the development of expensive urban meteoro...
Article
Full-text available
Urban canopy parameters (UCPs) are essential in order to accurately model the complex interplay between urban areas and their environment. This study compares three different approaches to define the UCPs for Moscow (Russia), using the COSMO numerical weather prediction and climate model coupled to TERRA_URB urban parameterization. In addition to t...
Article
Full-text available
This paper reports on various aspects of the urban heat island (UHI) of the Moscow megacity – its spatial and temporal variability and linkages with human thermal comfort. Firstly, we analyze long-term trends of air temperature, UHI intensity and thermal stress indices based on meteorological observations over the period 1977-2018. We show that the...
Article
Full-text available
A new methodology is proposed for computing the city-descriptive parameters for the TERRA_URB scheme in the COSMO model. It is based on the GIS analysis of OpenStreetMap data, Sentinel-2 satellite images, and global land cover data. A set of parameters is obtained for Moscow megacity on a grid with the spacing of 500 m. The dataset is promising for...
Article
Full-text available
The study presents the new system for operational short-range numerical weather prediction with the grid spacing of 1 km for the Moscow region that considers the features of urbanized surface and is based on the COSMO-Ru1M model configuration. This system is implemented in the Hydrometcenter of Russia. The results of the trial testing of the optimu...
Article
Water regime of rivers is an important characteristic of the surface land waters as a natural environment component and object of economic use. The reaction of the rivers’ water regime to the climatic changes, including the case of extreme hydro-meteorological events, has not been studied carefully yet. It is necessary to adapt the water part of na...
Article
Full-text available
The article focuses on the study of flood flow changes on the rivers of the European Territory of Russia (ETR) in the last thirty years. This is an extremely important problem, as with floods, whose contribution to the structure of the annual flow of European rivers in recent decades has been increasing, the most destructive floods are associated....
Article
Full-text available
The article describes the experience of applying various approaches to the recognition of some of the most common settlements planning structures, which include radial, regular and ring elements. At the first stage, it is necessary to identify typical properties and elements of the corresponding figures, then find a way to automate the search for s...
Article
Full-text available
Detailed weather and climate modeling for urban areas is in demand in various scientific and applied tasks, starting from a numerical weather forecast and ending with an assessment of the bioclimatic conditions of the city and long-term urban planning. The application of modern meteorological models for urban areas requires the determination of a s...
Article
Full-text available
This work is devoted to modeling of characteristics of comfort thermal conditions in some Arctic cities under climate change. In this paper, the authors try to solve the problem of scarce meteorological observing stations in the cities by modeling thermal comfort indices in the Arctic urban landscape. For this, seven Arctic cities are classified ac...
Article
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Urban climate comfort is an indicator of a set of parameters, such as temperature, humidity, and solar radiation for a person’s sensation of being favorable to being outdoors or indoors. In this study, an attempt to develop a technology of real-time prediction of thermal comfort conditions in urban landscape is described (based on the example of Mo...
Article
Full-text available
The river runoff regime significantly changed worldwide in the end of XX – the beginning of XXI century. In the European part of Russia the current changes are manifested in different ways in various regions. The main trend that is observed for most river basins is the ‘leveling’ of annual hydrographs. The interception of melt water during occasion...
Article
Full-text available
The COSMO-Ru1Mp prototype of the numerical weather prediction system for the Moscow region with a grid spacing of 1 km and with the included and adapted TERRA_URB parameterization module for the urban areas is implemented. The module is provided with necessary information on the urban development and on the sources of anthropogenic heat based on th...
Article
Full-text available
One of the important stages of map generalization is the selection of optimal simplification procedure for each spatial feature or feature type. Selected algorithms are then applied collaboratively to simplify the whole set of features. However, there is a lack of investigations that report a systematic approach of deriving a similar reduction in a...
Article
Full-text available
Cargo flow maps are used to represent the freight traffic on a transportation network. Usually the flows are represented as multicolor ribbons along railroads or highways. Each ribbon is a series of parallel lines. The width of a ribbon corresponds to the total freight traffic on a road segment between each crossroads, while the width of every line...
Article
Full-text available
Digital elevation models (DEM) are widely used for hydrological analysis–the assessment of surface runoff properties. ‘Raw’ DEMs are rarely suitable for reliable hydrological analysis, which requires DEM to be in so-called ‘hydrologilcally correct’ form. Hydrological correctness requires that all closed local depressions (pits) should be removed fr...
Article
Full-text available
The article presents an approach to the generalization of transport networks on multiscale maps, based on the automated derivation of transport corridors. The logical connection between the concept of a polymagistral as a way of representing spatially conjugated sections of transport routes of various types and the process of generalization of a ca...
Article
Full-text available
The development of digital elevation models (DEM) and methods of its analysis expanded its application in various geographical researches, and for hydrological modeling in particular. In this paper we present a procedure of harmonizing DEM and hydrographic network for automated basin delineation at a small scale. It is shown that the harmonization...
Poster
Full-text available
One of the core elements in improvement of understanding of the nature of changes in hydrological extremes is a deep analyses of the historical data. When using for analysis only values that can be easily derived from the datasets of daily discharges: annual mean, min., max. value - we use only a small percentage of the information from the 365 dai...
Article
Full-text available
Local climatic zones are areas with a uniform land cover, structure, materials and a specific character of human activity, which have a special type of interaction with the surface layer of the atmosphere. Allocating climatic zones in cities provides possibility to reduce various combinations of built-up and land cover to a limited number of classe...
Article
Full-text available
Modern features of the water regime are considered, namely, the role of flood runoff in its formation on the rivers of the European part of Russia. Based on the analysis of the hydrograph by genetic components, changes in the characteristic dates and maximum water consumption of thaw and rain floods, and the volume of runoff for each phase of the h...
Article
Full-text available
In this paper, the experience of applying a regional climate model to simulating the summer climate features of Moscow metropolitan area is examined. Also, an assessment is made of climate response to the implementation of a scenario of twofold city expansion. The model (COSMO-CLM) was adapted to the conditions of the region under investigation, su...
Article
Full-text available
The paper discusses the first application of the mesoscale regional climate model COSMO-CLM coupled with two spatialized urban canopy parameterizations, single-layer urban canopy model TEB (Town Energy Balance) and bulk parameterization TERRA-URB for the modeling of summer microclimatic conditions in Moscow agglomeration. The model was used for dyn...
Article
The 28th International Cartographic Conference ICC 2017 was held in Washington, DC in July 2017. The conference is a significant event in the world of cartography setting the path of development for the next 2 years. 40 topics were offered to participants of the conference in accordance with which they had to make oral presentations or posters and...
Conference Paper
Full-text available
Large cities and urban territories has apparently strong influence on many aspects of meso-and microscale weather and climate patterns, biometeorological and human health conditions, radiation effects. Urban landscapes are playing an important role in the intensification of global warming and affecting to different severe weather events frequency....
Poster
Full-text available
Large cities and urban territories has apparently strong influence on many aspects of meso- and microscale weather and climate patterns, biometeorological and human health conditions, radiation effects. An investigation of urban climate and boundary layer features is one of the most important modern challenges for microclimatology. Developing of th...
Conference Paper
Full-text available
Detection of the rivers' feeding type is a complex and multifactor task. Such partitioning should be based, on the one hand, on the genesis of the feeding water, on the other hand, on its physical path. At the same time it should consider relationship of the feeding type with corresponding phase of the water regime. Due to the above difficulties an...
Poster
This research is devoted to adaptation and verification of COSMO-CLM model, coupled with bulk urban canopy scheme TERRA_URB (Wouters et. al, 2016) for Moscow city and simulation of its urban heat island (UHI) phenomenon. Tuning of model configuration, calculation of the required urban surface parameters and comparison of modelling results with diff...
Conference Paper
Full-text available
The main goal of this investigation is to develop a kind of " urban reanalysis " – the database of meteorological and radiation fields under Moscow megalopolis with high spatial resolution. Sky View Factor (SVF) is widely used for evaluating the solar irradiance attenuation in urban canopy. In this study we suggested raster-based calculation of SVF...
Conference Paper
Full-text available
Line generalization is one of the essential data processing operations in GIS and cartography. Many point reduction, line simplification and generalization algorithms have been developed for this purpose so far. Several specialized algorithms can be found that allow simplification of buildings — mainly to preserve their rectangular shape and reprod...
Article
Full-text available
This paper presents the description of a monitoring system based on drifters equipped with GPSreceiver and cellular GSM. The system provides data about currents with a temporal and spatial resolution of 5–10 minutes and 100–200 m. The movement of the drifter can be observed in real time. Several experiments were conducted on the Black Sea shelf for...
Article
Full-text available
В статье приводятся описание и результаты апробации системы мониторинга течений, основанной на отслеживании траекторий дрифтеров, оснащенных GPS-приемником и сотовой связью GSM. Данная система позволяет получать данные о течениях с пространственным разрешением 100–200 м и заданным временным интервалом от 5 минут. Благодаря использованию GSM-связи з...
Chapter
Full-text available
В статье приведен обзор основных достижений в области автоматизации картографического изображения рельефа с 2000 по 2015 г. Этот временной период характеризуется появлением новых подходов к генерализации цифровых моделей рельефа, обеспечивающих высокое картографическое качество результатов. Впервые автоматизированы сложные техники перспективного и...
Book
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Учебное пособие, разработанное по курсу «Информатика с основами геоинформатики». Часть 2: «Основы геоинформатики» в форме компьютерного практикума, представляет собой комплекс учебных заданий для последовательного освоения практических методов геоинформатики и ГИС-технологий пространственного анализа с использованием баз пространственных данных и с...
Article
Full-text available
В статье представлен алгоритм, разработанный для отбора населенных пунктов в мелких масштабах картографирования в автоматическом режиме. Отбор точек производится с учетом их пространственного распределения на основе диаграммы Вороного с районированием территории на несколько классов густоты. Произведена оценка результатов отбора с использованием об...
Article
Full-text available
An ambitious “Abstracting Geographic Information in a Data Rich World” presents the cutting edge achievements in one of the most complicated areas of professional cartography — map generalisation. Ten hot research topics with introduction and conclusion that comprise this 400-page volume are tightly fitted into synoptic observation format that make...
Conference Paper
Full-text available
Urban Heat Island (UHI) effect (Magee et al, 1999) in high latitudes is very poorly described in scientific literature. Actually, we know nothing about behavior of the heat islands during the polar night, while anthropogenic heat is the main source of thermal energy. This study is aimed to mitigate this lack of information about climatology of UHI...
Chapter
Full-text available
The aim of this chapter is to provide an overview of recent developments in the fields of small-scale and multi-scale relief mapping. Hypsometric tinting, relief shading, continuous color shading, plan oblique relief and other techniques are widely used for maps covering large territories at small scales. The main difference between these technique...
Article
Full-text available
В статье представлен оригинальный алгоритм, разработанный для мелкомасштабной генерализации сети дорог в соответствии с заданным множеством населенных пунктов. Отбор сегментов дорожной сети осуществляется путем построения кратчайших маршрутов между населенными пунктами. Оптимизация числа маршрутов производится на основе эмпирических кривых. Алгорит...
Article
Full-text available
The article presents the results of field studies carried out by the Department of Land Hydrology, Faculty of Geography, Lomonosov Moscow State University, in the area near the White Sea Biological Station, Moscow State University (Kandalaksha Bay, White Sea) in January, June, and September 2014 and January 2015. The objects of studies were the uni...
Article
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В статье рассматривается концепция структуры спектральной библиотеки Геопортала МГУ. Одна из частей спектральной библиотеки содержит информацию о растениях Севера (Кольский полуостров). Спектры объектов пространственно привязаны к базовой карте местности, а также наложены на многозональные и гиперспектральные космические снимки территории и тематич...
Article
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Many lakes at different stages of separation from the sea were formed along the coast of Kandalakshsky Gulf of the White Sea because of a rapid glacioisostatic lifting. The natural stage of their hydrological evolution is the meromixis. Five stratified lakes at different stages of isolation were studied in 2010-2014. The studies included echo-sound...
Article
Structural framework of the MSU Geoportal spectral library is discussed. A part of the library includes information about northern plants (of the Kola Peninsula). The spectra are referred to the topographic map and placed over multi- and hyperspectral space images and thematic maps resulting from imagery interpretation. Primary attention was given...
Article
Full-text available
This article is devoted to investigation of the urban heat island phenomenon of Norilsk city, which is on of the biggest polar cities, under the polar night conditions with usage of automatic weather stations, iButton compact temperature sensors and MODIS remote sensing data. It was found that during the polar night anthropogenic heat flux forms si...
Conference Paper
Full-text available
More than a half of world’s population lives in cities now, and the urban/rural ratio is increasing (World Urbanization... 2014), which deserves increased attention to heavily populated areas. Contemporary meteorological models assimilate information about urban conditions for implementation of scenarios of physical interaction between atmosphere b...
Article
Full-text available
Observations of near-surface coastal currents were made by using a modern technology, which is based on GNSS-positioning of drifting buoys. The authors describe drifter construction and technological scheme of their monitoring with GNSS. Data from several experimental drifter launches in coastal zone of the Black Sea is presented. Future lines of d...
Conference Paper
Full-text available
Urban Heat Island (UHI) effect is well-known in modern climatology due to its influence on different economic features and urban air quality (Oke, 1987). Also UHI characteristics differs in different climate zones, for example in summer in Mediterranean and subtropical monsoon climate types it leads to growing energy consumption due to AC systems us...
Article
Full-text available
Hachuring is a classic method of cartographic relief presentation that origins from perspective sketching of the surface. Hachuring was developed into strict and mathematically grounded planimetric method during the eighteenth century. Established by Lehmann in 1799, topographic hachures flourished during the first half of the nineteenth century an...