Dr. Stelian Dimitrov Profile

Dr. Stelian Dimitrov

at Sofia Univ "St Kliment Ohridski"

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 21 September 2023 Paper

Geospatial localization analysis of green infrastructure development assumptions in urbanized areas concerned by air quality: the case of Sofia Municipality, Bulgaria

Bilyana Borisova, Stelian Dimitrov, Ivo Ihtimanski, Lidiya Semerdzhieva, Stoyan Valchev, Martin Iliev

Proceedings Volume 12786, 127860U (2023) https://doi.org/10.1117/12.2680839

KEYWORDS: Buildings, Reflection, Air quality, Chemical elements, Air contamination, Analytical research, Climatology, Orthophoto maps, Data processing, 3D modeling

Read Abstract +

Proceedings Article | 21 September 2023 Paper

Application of thermal photogrammetry in local climate zones definition for urban heat island effect assessment and mapping of the city of Burgas, Bulgaria

Stelian Dimitrov, Bilyana Borisova, Martin Iliev, Lidiya Semerdzhieva

Proceedings Volume 12786, 127860V (2023) https://doi.org/10.1117/12.2681776

KEYWORDS: Climatology, Climate change, Spatial resolution, Reflection, Photogrammetry, Land cover, Sensors, Air temperature, Thermal effects

Read Abstract +

The aim of this study is to present the possibilities of thermal photogrammetry, carried out by an Unmanned Aerial System (UAS) in determining the Local Climate Zones (LCZ) in the city of Burgas, Bulgaria. This LCZ-based methodological approach has been used as one of the major standards in the research practices of mapping and assessment of the effects of the Urban Heat Island phenomenon (UHI). А complex methodological approach specifically designed for the purpose of the study was applied, which includes the use of a flying wing type UAS and a specialized integrated sensor with a thermal calibrated camera and a photogrammetric one, as well as a developed scheme for the collection, processing, and modeling of the data. As a result, the thermal characteristics of the surface of the individual types of LCZ on the territory of the city of Burgas were determined and specified. The latter was used as an information basis for modeling and mapping the effect of the UHI and determining its intensity. The data were collected according to a predetermined sampling scheme within a two-year period (2021-2022) during the hottest months of the year for the city (July and August) by the National University Center for Geospatial Research and Technology. All in-situ studies were carried out after sunset, in the time interval 20:30 - 22:00, in order to eliminate the effect of direct solar radiation on the recorded temperatures of the different land cover types. Subsequently, the collected and processed data were cataloged and integrated into geographic database of the LCZ, and the potential thermal load of each individual LCZ and individual land cover types was estimated. The results have been discussed with the Municipality of Burgas and will be used in the development of a series of urban planning measures focusing on energy efficiency, human health (regulating ecosystem services from green infrastructure) and the conservation of protected areas (falling immediately within the municipality).

Proceedings Article | 21 September 2023 Paper

Integrated application of remote sensing data for mapping the landslide vertical deformations

Alexander Gikov, Stelian Dimitrov, Martin Iliev, Leonid Todorov, Nadezhda Nikolova

Proceedings Volume 12786, 1278619 (2023) https://doi.org/10.1117/12.2681768

KEYWORDS: Deformation, LIDAR, Remote sensing, Data modeling, Associative arrays, Systems modeling, Laser scanners, 3D modeling, Point clouds, Photography

Read Abstract +

Proceedings Article | 21 September 2023 Paper

Integrated application of UAS-based and geoinformation tools for studying urban mobility patterns in urbanized territories: the case of Sofia, Bulgaria

Martin Iliev, Stelian Dimitrov, Kliment Naydenov, Stephan Petrov, Ivan Ivanov

Proceedings Volume 12786, 127860W (2023) https://doi.org/10.1117/12.2681738

KEYWORDS: RGB color model, Geographic information systems, Image processing, Sensors, Cameras, Visualization, Visual analytics, Image analysis, Analytical research, Unmanned aerial vehicles

Read Abstract +

Proceedings Article | 26 August 2020 Open Access

Mapping and assessment of urban heat island effects in the city of Sofia, Bulgaria through integrated application of remote sensing, unmanned aerial systems (UAS) and GIS

Stelian Dimitrov, Anton Popov, Martin Iliev

Proceedings Volume 11524, 115241A (2020) https://doi.org/10.1117/12.2571967

KEYWORDS: Remote sensing, Geographic information systems, Satellites, Temperature metrology, Earth observing sensors, Climatology, Landsat, Thermography, Thermal effects, Sensing systems

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 27 June 2019 Paper

Integrated model of application of remote sensing and field investigations for sanitary status assessment of forest stands in two reserves in West Balkan Range, Bulgaria

Stelian Dimitrov, Georgi Georgiev, Plamen Mirchev, Margarita Georgieva, Martin Iliev, Danail Doychev, Sonja Bencheva, Gergana Zaemdzhikova, Nikolay Zaphirov

Proceedings Volume 11174, 1117404 (2019) https://doi.org/10.1117/12.2532313

KEYWORDS: Remote sensing, RGB color model, Vegetation, Photography, Near infrared, Integrated modeling, Climatology, Pathogens, Data processing, Cameras

Read Abstract +

Showing 5 of 6 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years