Apostolos Papakonstantinou

Apostolos Papakonstantinou
University of the Aegean · Department of Marine Sciences

PhD Geoinformatics Cartography - MSc Informatics - BSc Physics

About

64
Publications
26,514
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528
Citations
Introduction
Apostolos is Adjunct Lecturer in Cyprus University of Technology and Research Fellow in MRSGroup Aegean University studying the use of UAS on Geovisualization and mapping. Additionally he is a post doc researcher with a scholarship from Greek State Scholarships Foundation (IKY). His research interests include, UAS data acquisition protocols, UAS in geovisualization & mapping, the combination of computational methods and algorithms in monitoring and mapping spatiotemporal phenomena, Cartography.
Additional affiliations
March 2019 - present
University of the Aegean
Position
  • PostDoc Position
Description
  • Senior Researcher with specialization n unmanned applications with UAS in the maritime sector. Participation as a Senior Researcher and project manager for the implementation of the project "(AeRial System and Anti piRacy System)
February 2017 - February 2019
Greek State Scholarships Foundation
Position
  • PostDoc Position
Description
  • Conducting postdoctoral research on "The potential use of UAS (Unmanned Aerial Systems) in the 3D Geovisualization and mapping of spatiotemporal phenomena”.
September 2016 - present
Cyprus University of Technology
Position
  • Lecturer
Description
  • Fall Cartography II, Geography and Spatial Analysis Geoinformatics & GIS, Research Methods: Geoinformatics, Geospatial Technologies Spring Introduction to Cartography, Thematic Cartography, Digital Cartography, Specialization in Geoinformatics.
Education
June 2016 - June 2016
Universitat de Girona
Field of study
  • UAV & Remote Sensing Applications
January 2006 - December 2011
University of the Aegean
Field of study
  • Goinformatics and Cartography
February 2003 - February 2005
University of the Aegean
Field of study
  • Cultural Informstics

Publications

Publications (64)
Article
Full-text available
The purpose of this paper was to study the influence of cartographic scale and flight design on data acquisition using unmanned aerial systems (UASs) to create augmented reality 3D geovisualization of geosites. The relationship between geographical and cartographic scales, the spatial resolution of UAS-acquired images, along with their relationship...
Article
Full-text available
Geography has long sought to explain spatial relationships between social and physical processes, including the spread of infectious diseases, within the context of modelling human-environment interactions. The spread of the recent COVID-19 pandemic, and its devastating effects on human activity and welfare, represent but examples of such complex h...
Conference Paper
Geography has long sought to explain spatial relationships between social and physical processes, including the spread of infectious diseases, within the context of modelling human-environment interactions. The spread of the recent COVID-19 pandemic, and its devastating effects on human activity and welfare, represent but examples of such complex h...
Article
Full-text available
Marine litter (ML) accumulation in the coastal zone has been recognized as a major problem in our time, as it can dramatically affect the environment, marine ecosystems, and coastal communities. Existing monitoring methods fail to respond to the spatiotemporal changes and dynamics of ML concentrations. Recent works showed that unmanned aerial syste...
Article
Full-text available
Geoinformatics plays an essential role during the recovery phase of a post-earthquake situation. The aim of this paper is to present the methodology followed and the results obtained by the utilization of Unmanned Aircraft Systems (UASs) 4K-video footage processing and the automation of geo-information methods targeted at both monitoring the demoli...
Article
Full-text available
Remote sensing is a promising tool for the detection of floating marine plastics offering extensive area coverage and frequent observations. While floating plastics are reported in high concentrations in many places around the globe, no referencing dataset exists either for understanding the spectral behavior of floating plastics in a real environm...
Article
Full-text available
Augmented reality (AR), in conjunction with 3D geovisualization methods, can provide significant support in monitoring geoconservation activities in protected geosites, such as the excavation process in fossil sites. The excavation process requires a monitoring methodology that will provide a complete and accurate overview of the fossils, their dim...
Article
Full-text available
Coastal areas are remarkable regions with high spatiotemporal variability. Many domains are affected by their physical and biological processes, from tourism to biodiversity and productivity. Coastal ecosystems perform several critical ecosystem services and functions such as water oxygenation and nutrient provision, seafloor and beach stabilizatio...
Article
Full-text available
The use of unmanned aerial systems (UAS) over the past years has exploded due to their agility and ability to image an area with high-end products. UAS are a low-cost method for close remote sensing, giving scientists high-resolution data with limited deployment time, accessing even the most inaccessible areas. This study aims to produce marine hab...
Chapter
Coastline change and human activities in shoreline zones are two factors indicating the vulnerability and the quality of a coastal environment. In this article, coastline evolution and spatiotemporal differences on coastal touristic infrastructure are presented as two case studies. Both case studies have increasing interest among scientists monitor...
Article
Full-text available
Aerial surveys in coastal areas using Unmanned Aerial Vehicles (UAVs) present many limitations. However, the need for detailed and accurate information in a marine environment has made UAVs very popular. The aim of this paper is to present a protocol which summarizes the parameters that affect the reliability of the data acquisition process over th...
Article
Full-text available
In the last year, the Greek islands of the eastern Aegean Sea were the main entrance points used by refugees arriving in the EU. The crossing between Turkey and the eastern Aegean islands is carried out using mostly small inflatable boats. Additionally, wooden and plastic vessels of various sizes are abandoned at the beaches upon arrival together w...
Conference Paper
Full-text available
Recent advances in Unmanned Aerial Vehicle (UAV), in photogrammetric software and the miniaturisation of sensors lead topographers to embed the Unmanned Aerial System - Structure form Motion (UAS-SfM) pipeline to field work for earth measurements and DTM creation. This study attempts to develop a tool and examine a methodology to produce Digital Te...
Article
Full-text available
Dynamic processes in coastal zones and human activities in the coastal environment produce pressure on cultural heritage, especially in touristic places. Unmanned aerial systems (UAS) are used as an additional tool for monitoring cultural heritage sites in sensitive coastal areas. UASs provide low-cost accurate spatial data and high-resolution imag...
Article
A rapidly rising amount of plastic litter on land and at sea is becoming a global wicked environmental problem. Here, we present an innovative exploratory application of unmanned aerial systems (UAS) and open-access satellite imagery in remote detection of floating plastics in natural seawater, through a dedicated aquatic environment experiment. We...
Chapter
Full-text available
This paper presents a methodological framework, which establishes links among the: i. 3D mapping, ii. 3D model creation and iii. damage classification grades of masonry buildings by European Macroseismic Scale-98 and the application of geoinformation methods towards 3D mapping and damage assessment after a catastrophic earthquake event. We explore...
Article
Coastline change and human activities in shoreline zones are two factors indicating the vulnerability and the quality of a coastal environment. In this article, coastline evolution and spatiotemporal differences on coastal touristic infrastructure are presented as two case studies. Both case studies have increasing interest among scientists monitor...
Conference Paper
Last years the role of Unmanned Aerial Systems becoming more and more crucial in a wide variety of scientific aspects that need fast and reliable geodata to monitor coastal cultural heritage areas. The dynamic processes in the coastal zone and human activities on the coastal environment produce pressure in cultural heritage especially in touristic...
Conference Paper
The collection of detailed and accurate information about marine habitats and flora species is crucial for mapping, monitoring and management of marine and coastal environments. Remote sensing is widely used to collect information at marine environments, while in recent years the potential use of UAS for mapping is examined. The aim of this paper i...
Conference Paper
Abstract Last years the role of Unmanned Aerial Systems becoming more and more crucial in a wide variety of scientific aspects that need fast and reliable geodata. Nowadays UAS have a prominent role in post-earthquake damage assessment as they are capable of collecting high in resolution data for mapping the results of a catastrophic event. The imp...
Conference Paper
Seagrass meadows play a vital role in coastal ecosystems health as constitute an important pillar of the coastal environment. So far, regional scale habitat mapping was implemented with the use of freely available medium scale satellite images (Sentinel-2 or Landsat-8). The Unmanned Aerial Systems (UAS) have increase the spatial resolution of the o...
Conference Paper
Full-text available
ABSTRACT Surface fire fuels are the primary source of combustion in most wildland ecosystems. Mediterranean shrubs constitute important understory surface fuels, as they are mainly dry and flammable during the summer fire season. Critical forest fuel properties for fire prevention and control are species composition, density, structure, and vertica...
Conference Paper
Full-text available
Abstract Geographic visualization has an important role in geographic research as it provides a meaningful tool for geographical data representation. The increasing power of information technology permits to create more accurate 3D geovisualizations in different scales. The aim of this paper is to present the methodology followed for the developme...
Conference Paper
Full-text available
Abstract The aim of this work is twofold: a) the implementation of a computational procedure, where the cartographic rules are defined as mathematical representations, and the geographic datasets are transformed into arithmetic data structures, b) the representation of the searching algorithm with explicit use of the arithmetic data structures deri...
Conference Paper
Full-text available
Social media is rapidly emerging as a potential resource of information capable to support natural disasters management. Despite the growing research interest focused on using social media during natural disasters, many challenges may arise on how to handle the ‘big data’ problem: huge amounts of geo-social data are available, in different formats...
Conference Paper
Full-text available
The aim of this paper is to present the methodology followed and the results obtained by the synergistic exploitation of geo-information methods towards 3D mapping of the impact of the catastrophic earthquake of June 12th 2017 on the traditional settlement of Vrisa on the island of Lesvos, Greece. A campaign took place for collecting: a) more than...
Conference Paper
Full-text available
Efficient and effective spatial data collection is crucial in cases of catastrophic events. Resources efficiency and project effectiveness are two aspects that need special attention especially when there are spatial and temporal constraints. There is limited literature regarding efficiency and effectiveness in spatial data collection approaches. T...
Article
Seagrass meadows are among the most valuable coastal ecosystems on earth due to their structural and functional roles in the coastal environment. This study demonstrates remote sensing's capacity to produce seagrass distribution maps on a regional scale. The seagrass coverage maps provided here describe and quantify for the first time the extent an...
Conference Paper
Χρήση Συστημάτων μη Επανδρωμένων Αεροσκαφών στην υπηρεσία της Πολιτικής Προστασίας. Η Τρισδιάστατη Χαρτογράφηση υψηλής ανάλυσης της πληγείσας περιοχής Βρίσας, από τον σεισμό της Λέσβου στις 12/06/2017 1. Περίληψη Ο συνδυασμός αλγορίθμων επεξεργασίας εικόνας με επιτόπιες μετρήσεις συντελεί στην ανάπτυξη νέων μεθόδων, τεχνολογιών και προϊόντων ως πρ...
Conference Paper
The dynamic processes in the coastal zone produce pressure on the environment and to the human activities. Sea level rise and tourism are two of the highest pressures on the costal zones. Sea level rise is a global threat and needs very careful monitoring for measuring the local impacts. Also, in touristic places, the coastal margins are rapidly oc...
Conference Paper
The significance of coastal habitat mapping lies in the need to prevent from anthropogenic interventions and other factors. Until 2015, Landsat-8 (30m) imagery were used as medium spatial resolution satellite imagery. So far, Sentinel-2 satellite imagery is very useful for more detailed regional scale mapping. However, the use of high resolution or...
Conference Paper
Coastline change and marine litter concentration in shoreline zones are two different emerging problems indicating the vulnerability as well as the quality of a coastal environment. Both problems present spatiotemporal changes due to weather and anthropogenic factors. Traditionally spatiotemporal changes in coastal environments are monitored using...
Article
Full-text available
One of the most important linear features on the monitoring of coastline is critical. The study of coastal system processes and coastal zone environmental management requires the information about coastlines and their changes. In this study, a methodology that extracts coastline efficiently by processing high-resolution orthophotos derived by UAV i...
Conference Paper
Ο συνδυασμός αλγορίθμων επεξεργασίας εικόνας με επιτόπιες μετρήσεις συντελεί στην ανάπτυξη νέων μεθόδων, τεχνολογιών και προϊόντων ως προς την οπτική αναπαράσταση θαλάσσιων γεωχωρικών πληροφοριών. Η γεωχωρική πληροφορία στο παράκτιο και θαλάσσιο περιβάλλον που έχει συλλεχθεί με τη χρήση δορυφορικών απεικονίσεων αλλά και δεδομένων από μη επανδρωμένα...
Article
Full-text available
The purpose of this paper is to present an algorithmic formulation addressing the cartographic problem of siting an inset map at specific map locations under spatial and cartographic constraints. The first part of the paper aims at: (a) presenting a numerical algorithm that solves the above siting problem under such constraints, and (b) investigati...
Conference Paper
Full-text available
Greek Islands are largely unknown, even if they are very often mentioned and discussed, either as “unique” or “ideal destinations” or negatively for health, remoteness and ageing issues. In the Atlas of the Islands, we want to talk about these islands as real spatial entities, discuss similarities and differences among them and between them and the...
Poster
Full-text available
According to the Aichi Biodiverity Target 11 set by the Convention on Biological Diversity, states are committed to protect 10% of marine coastal areas by 2020. In line with this, the ultimate goal of the MARISCA project is to propose a network of Marine Protected Areas (MPAs) for the conservation of all important and vulnerable habitats and specie...
Conference Paper
Full-text available
Seagrass meadows play a significant role in ecosystems by stabilizing sediment and improving water clarity, which enhances seagrass growing conditions. It is high on the priority of EU legislation to map and protect them. Greece very recently announced the mapping of seagrass meadows in very coarse resolution (1km) mainly to compromise with EU legi...
Conference Paper
Full-text available
Coastal environments and their topographic changes have increasing interest among scientists that monitoring degradation in sensitive coastal areas. Topographic changes in beach zones are observed mainly after severe events due to the action of the sea and sea waves. Additionally, human interaction can be a cause of the coastal environment material...
Presentation
Full-text available
Η έρευνα αυτή παρουσιάζει τα αποτελέσματα της διερεύνησης χαρτογραφικών οπτικοποιήσεων κλιματικών παραμέτρων φιλικών προς άτομα με δυσχρωματοψία. Πιο συγκεκριμένα στην έρευνα αυτή, μελετώνται οι απαιτήσεις και οι ιδιαιτερότητες των χαρτογραφικών απεικονίσεων οι οποίες παρουσιάζονται για άτομα με δυσχρωματοψία. Πρόσθετα πραγματοποιείται μια προσπάθε...
Article
Full-text available
Spatial data acquisition is a critical process for the identification of the coastline and coastal zones for scientists involved in the study of coastal morphology. The availability of very high-resolution digital surface models (DSMs) and orthophoto maps is of increasing interest to all scientists, especially those monitoring small variations in t...
Conference Paper
Full-text available
Seagrass meadows play a significant role in ecosystems by stabilizing sediment and improving water clarity, which enhances seagrass growing conditions. It is high on the priority of EU legislation to map and protect them. The traditional use of medium spatial resolution satellite imagery e.g. Landsat-8 (30m) is very useful for mapping seagrass mead...
Conference Paper
This paper proposes an approach for grouping solutions in cartographic design optimization problems, such as the placement of map insets, using mathematical morphology operators. More specifically, we propose an efficient methodology to assign provisional labels to groups of points denoting locations where favorable conditions exist, through the us...
Conference Paper
Full-text available
One of the most important linear features on the earth’s surface is coastline, thus the detection and monitoring of coastline is critical. The study of coastal system processes and coastal zone environmental management requires the information about coastlines and their changes. In this study, a methodology that extracts coastline efficiently by pr...
Conference Paper
Full-text available
he Roman aqueduct of Mytilene is one of the greatest technical works of antiquity in the Aegean, but it has been little studied. Its construction was intended to provide water for the city of Mytilene in the early Christian period. It begins on the slopes of Olympus in the central part of the island and reaches the city of Mytilene at the east coas...
Conference Paper
Full-text available
Η γνώση του κλίματος και των μεταβολών του ανά γεωγραφική περιοχή θεωρείται σημανική για μια σειρά από τομείς, όπως η προστασία του περιβάλλοντος, η γεωργία, ο τουρισμός, η πρόληψη φυσικών καταστροφών κ.ά. Στο πλαίσιο του έργου «Γεώκλιμα» αναπτύχθηκε ένα ολοκληρωμένο Διαδικτυακό Σύστημα Γεωγραφικών Πληροφοριών, το οποίο έχει τη δυνατότητα διαχείρισ...
Conference Paper
Full-text available
Η χαρτογραφική οπτικοποίηση και η διάθεση της χωρικής πληροφορίας με την χρήση φορητών συσκευών μέσω διαδικτυακών εφαρμογών έχουν επαναπροσδιορίσει τη μεθοδολογία σύνθεσης και τον τρόπο διάθεσης και χρήσης της γεωγραφικής πληροφορίας. Όροι όπως Νεογεωγραφία, Εθελοντική Γεωγραφική Πληροφορία, διαδικτυακή χαρτογράφηση (web and mobile mapping), χρησιμ...
Conference Paper
Full-text available
The complex topography of the Greek area poses a significant challenge in creating physically realistic and spatially accurate maps of climate elements. This study aims to assess the potential of a methodology for modeling and mapping the seasonal and annual normals of several climate variables over Greece using several topographical and geographic...
Conference Paper
Full-text available
Περίληψη Η γεωγραφική οπτικοποίηση τα τελευταία χρόνια ενσωματώνει τεχνολογίες διαδικτύου και διαδικτυακές υπηρεσίες για την απεικόνιση, τη διάθεση και τη χρήση των τελικών χαρτογραφικών απεικονίσεων. Η διάδραση στην πλοήγηση και την εξερεύνηση της πληροφορίας δίδει στην τελική οπτικοποίηση την διαδραστικότητα που απαιτείται για την απεικόνιση νέω...
Article
Full-text available
Insetting procedure is a time consuming problem in island cartography, where cartographers dealing with special cartographic problems confronted in the portrayal of island regions, and demands the use of specially developed algorithms and software tools. This paper presents the implementation of a parallel numerical searching algorithm for the opti...
Conference Paper
Full-text available
The aim of this work is twofold: a) the implementation of a computational procedure, where the cartographic rules are defined as mathematical representations, and the geographic datasets are transformed into arithmetic data structures, b) the improvement of an existing searching algorithm to a more efficient one, with explicit use of the arithmetic...
Conference Paper
Full-text available
Το ρωμαϊκό υδραγωγείο Μυτιλήνης, μήκους περίπου 26 χιλιομέτρων, αποτελεί ένα από τα σημαντικότερα τεχνικά έργα της αρχαιότητας στο νησιωτικό χώρο, το οποίο όμως έχει μελετηθεί ελάχιστα. Η κατασκευή του αποσκοπούσε στην κάλυψη των υδρευτικών αναγκών της πόλεως της Μυτιλήνης κατά τους πρώτους μεταχριστανικούς αιώνες. Η πορεία του ξεκινάει από τις πηγ...
Conference Paper
Full-text available
Γεωγραφική Οπτικοποίηση, Τριδιάστατη Οπτικοποίηση, Εικονική αναπαράσταση. 3D απεικόνιση ηχητικής όχλησης, Κλίµακα οπτικοποίησης. Περίληψη Η οπτική επικοινωνία που επιτυγχάνεται µε την χρήση των τριδιάστατων αναπαραστάσεων αποτελεί ένα συνεχώς αυξανόµενο σε χρήση εργαλείο για την λήψη αποφάσεων περιβαλλοντικών επιπτώσεων. Χρησιµοποιείται συχνά ως «µ...
Conference Paper
Full-text available
In this paper we present the implementation of a parallel searching algorithm, which is used for the insetting procedure in cartography. The calculation time of the above procedure is very long due to the fact that the datasets in cartography are maps with large and very large resolution. The purpose of this proposal is to reduce the calculation ti...
Article
Full-text available
Island cartography deals with special cartographic problems confronted in the portrayal of island regions and demands the use of specially developed software tools. One of the most commonly faced problems is the need of inset map creation for very small islands, and sometimes isolated ones, that must be displayed in the main map. This paper present...
Conference Paper
Full-text available
Cartographic design is a process of scale selection, symbolization and placement of geographical information. In Island Cartography scientists are faced with a unique and special cartographic problem, that of land discontinuity, which arises when scientists want to visualize islands regions with multiple islands of significantly different size. The...
Article
Full-text available
Η Χαρτογραφία συχνά καλείται να αντιμετωπίσει προβλήματα για τα οποία η ανάπτυξη ειδικά σχεδιασμένου λογισμικού κρίνεται απαραίτητη. Πιο συγκεκριμένα η Νησιωτική Χαρτογραφία αντιμετωπίζει ιδιαίτερα προβλήματα τα οποία εμφανίζονται κατά κύριο λόγο στην προσπάθεια απεικόνισης νησιωτικών περιοχών. Το πρόβλημα της «Χωρικής Ασυνέχειας του Γεωγραφικού Χώ...
Article
Full-text available
Surface fire fuels are the primary source of combustion in most wildland ecosystems. Mediterranean shrubs constitute important understory surface fuels, as they are mainly dry and flammable during the summer fire season. Critical forest fuel properties for fire prevention and control are species composition, density, structure, and vertical and hor...
Conference Paper
Full-text available
Geographic visualization has an important role in geographic research as it provides a meaningful tool for geographical data representation. The increasing power of information technology permits to create more accurate 3D geovisualizations in different scales. The aim of this paper is to present the methodology followed for the development of the...