Spatial Analysis

Geographic Information Systems & Remote Sensing.

ABOUT

The research in the Spatial analysis, Geographic Information Systems and Remote Sensing (SAGISRS) group concentrates on the development of mathematical, statistical and computational tools and methods for generating, analyzing, managing and visualizing geographic (spatial) data.  This is a rapidly developing research area often referred to as, Geoinformatics and/or Geotechnology with multiple applications in urban and regional analysis, environmental analysis, climatology, urban climate and air quality, etc.

The tools and methods the group develops are useful for public and private organizations to analyze spatial information and formulate rational economic development, social and environmental policies and evaluate alternative mitigation plans.  Specifically, the group develops:

  • Spatial decision support systems using Geographic Information Systems (GIS) methodologies and mathematical models simulating various environmental and urban processes,
  • Remote sensing methodologies for: extracting geo-information products and indicators from satellite observations; adjusting machine learning algorithms to estimate sub-pixel fractions; downscaling bio-geophysical parameters derived from satellites synergies; analyzing long time series of satellite images (Big Data) in cloud computing environment; and analyzing UAV hyperspectral and thermal imagery,
  • Urban climate methods to analyze urban form and function, by combining satellite derived surface parameters with in-situ observations of urban heat fluxes and CO2 emissions from micrometeorological towers (Eddy Covariance and Net Radiation equipment) and standard meteorological and air quality variables from Wireless Sensors Networks.
  • Methodologies for the analysis of the organization of urban areas with respect the distribution of the land uses and the built-up densities, the socio-economic characteristics of the population, the traffic patterns in the street network etc.
  • Tools for the visualization and management of digital maps on the web.

Group members include researchers with a wide spectrum of expertise from quantitative geography, remote sensing, statistics, applied informatics, atmospheric physics and urban and regional planning.  The research effort has been supported from grants from competitive EU projects and grants from Greek public organizations. EU research programs the group has participated include H2020, INTERREG, ERA.Net, FP7, LIFE, ESA and many others. Funding has been also obtained from the General Secretariat of Research and Technology of Greece (GSRT), the Hellenic Statistical Authority, the Region of Crete, the Athens Urban Transport Organization, the Ministry of Health, The Municipality of Heraklion and others.

The group was formed in the early 1990’s and until recently its name was “Regional Analysis Division”. Dr. Poulicos Prastacos is head of the group. Dr. Nektarios Chrysoulakis is the scientific director of the research on earth observation.

RESEARCH AND DEVELOPMENT ACTIVITIES

Urban Analysis: In the last fifty years urban areas worldwide are growing rapidly. Concentration of people leads to easy connectivity, economies of scale and higher productivity, increased buildup densities and changes in lifestyles, it has however, adverse impacts on the environment. Some of the urban analysis research topics studied in the group include:

  • The distribution of land uses and buildup densities to identify urban form and sprawl characteristics,
  • Social area analysis, that is the analysis of the socio-economic characteristics of the population to identify neighborhoods with common characteristics, the location of segments of the population in need, etc.,
  • Urban growth models,
  • Urban metabolism and the way it affects consumption of various resources,
  • Urban climate research focusing on: analyzing satellite and UAV observations to derive urban surface morphology, cover and fabric; identifying Local Climate Zones, developing footprint models to deal with urban surface anisotropy; monitoring urban energy balance; analyzing urban heat island, thermal comfort and energy efficiency; analyzing Eddy Covariance observation to estimate CO2 emissions and adjusting methods for pollutants dispersion in the urban boundary layer.
  • The concentration of air particles in urban areas,
  • The analysis of traffic patterns in the street networks of urban areas
Spatial decision support system: SDSS are information systems for supporting decision making and have extensive applications in environmental planning, resources allocation, business decision making and other fields. Through an integrated and user-friendly environment, they bring together simulation models, GIS databases, impact assessment methodologies and decision rules. The research of the group concentrates on the integration of simulation models with the GIS systems, the development of various spatial datasets and the design of the end user interface. Application areas studied in the group include:

  • Simulation of natural disasters such as floods and forest fires,
  • Leaks detection in municipal water distribution systems,
  • Mapping noise levels in urban areas.
The Remote Sensing Laboratory: The Remote Sensing Laboratory (http://rslab.gr) concentrates in the field of Earth Observation (EO) and its area of research is the study of environmental phenomena and problems. The Lab operates a Wireless Sensors Network and a Micrometeorological Tower carrying Eddy Covariance and Net Radiation Infrastructures in the city of Heraklion. The Lab owns computational facilities and also it has access to cloud computing Infrastructures, such as Google Earth Engine and European Space Agency Urban-TEP, to analyze long time series of high spatial resolution satellite observations (Big Data). In the last ten years, the Lab has played a leading role in the domain of Urban Remote Sensing at European level, by coordinating relevant FP7, ERA.Net and H2020 projects, by publishing several articles in peer-review journals annually and by organizing and chairing Urban Remote Sensing sessions in the frame of big symposia, such as SPIE and JURSE. The focus of the activities of the Lab are on the analysis of both urban and natural environments.

  • Concerning urban environment, the main focus is on urban climate and on urban planning, with emphasis on climate change mitigation and adaptation activities. More specifically, areas of research include the estimation of energy, water and carbon exchanges between the surface and the atmosphere. Several city typologies and climatically meaningful urban zoning systems are derived based on satellite observations. EO is used to monitor the dynamic changes of urban surface cover, fabric and morphology, providing quantitative estimates of relevant surface and atmospheric parameters, as well as, environmental indicators for supporting urban planning and management and assessing sustainability.

  • Concerning natural environment, the Lab activities focus on environmental monitoring and development of methods for exploiting Earth Observation in improving future ecosystems, ecosystems services, as well as in supporting risk management for natural hazards.
Spatial spatiotemporal statistical modeling: The goal of spatial/spatiotemporal statistical modeling is to analyze datasets with spatial/spatiotemporal information to identify the underlying relationships and patterns and to compute predictions of unknown quantities in space and time. Bayesian space-time models, spatial econometrics, eigenvector filtering, and multivariate analysis are some of the techniques used. Areas of applications include:

  • Short-term traffic forecasting and incident detection,
  • Epidemiology,
  • Analysis of environmental data,
  • Geodemography,
  • Regional economics.

Spatial Analysis

Geographic Information Systems & Remote Sensing.

RESEARCH AND DEVELOPMENT PROGRAMS

A. ONGOING PROJECTS

  • EPIRROH: Information system for monitoring the leaks in municipal water systems (2017 - 2019). The objective of the project is the development of an information system for monitoring the Municipal Water Supply Network Monitoring System.
  • PERAN :  Innovative research actions for environmental research and development (2017 - 2020). PERAN is a research program on environmental issues in which all FORTHs institutes are participating.
  • POLITEIA II: Cultural Heritage - Technology (2017 - 2020). POLITEIA ΙΙ is an integrated interdisciplinary research action for the development and the best use of innovative technologies in the domain of Cultural Heritage. 
  • URBANFLUXES:  EU-funded H2020 URBan ANthropogenic heat FLUX from Earth observation Satellites is a Space project on “New ideas for Earth-relevant space applications” aims to investigate the potential of Earth Observation (EO) to retrieve anthropogenic heat fluxes.
  • THINKNATURE: EU-funded H2020 project ThinkNature is developing of a multi-stakeholder communication platform that will support the understanding and the promotion of nature based solutions in local, regional, EU and International level. 
  • ECOPOTENTIAL: The EU-funded H2020 Improving future Εcosystem benefits through Earth Observations is a large project that focuses its activities on a targeted set of internationally recognised Protected Areas, blending Earth Observations from remote sensing and field measurements, data analysis and modelling of current and future ecosystem conditions and services. 
  • BRIDGE: The EU-funded FP7 sustainaBle uRban plannIng Decision support accountinG for urban mEtabolism  aimed at bridging the gap between bio-physical sciences and urban planners and to illustrate the advantages of accounting for environmental issues on a routine basis in design decisions. 
  • SEN4RUS: The ERA.Net-RUS Plus project SEN4RUS (exploiting Sentinels for supporting urban planning applications at city and regional levels in Russia) aims at taking into account the specific requirements of spatial and urban planning in Russia to develop indicators that effectively and efficiently exploit the information content provided by Copernicus Sentinels mass data streams in support of city and regional planning.
  • LIFE IGIC: The Life IGIC project will develop Green Infrastructure (GI) and supporting Sustainable Farming Methods in pilot olive orchards, in Western Messara plain, south Crete, Greece. 
  • GEOURBAN: The ERA.Net-RUS project Earth Observation in sUstainable uRBan plAnning & maNagement aimed to bridge the gap between EO scientists and urban planners by demonstrating the ability of current and future EO systems to depict parameters of urban structure and urban environmental quality over large areas at detailed level .
  • FLIRE: The EU-funded LIFE+ project Floods and Fire risk assessment and management was a demonstration project aiming to the development of an integrated Web-based Decision Support System (DSS) for both flash floods and forest fires risk assessment and management.
  • TAHOMA: Earth Observation for Surface Energy Balance) was a bilateral collaboration between Greece and France, aimed at reviewing existing (Earth Observation) EO systems and state-of-the-art methods to identify their capabilities and limitations in supporting Surface Energy Balance (SEB) modelling.
  • PW: Precipitable Water was a bilateral collaboration between Greece and China, aimed at providing accurate precipitable water spatial distribution maps over Greece, capable of being used in regional and local studies.


B. COMPLETED PROJECTS

  • GEOURBAN: The ERA.Net-RUS project Earth Observation in sUstainable uRBan plAnning & maNagement aimed to bridge the gap between EO scientists and urban planners by demonstrating the ability of current and future EO systems to depict parameters of urban structure and urban environmental quality over large areas at detailed level .
  • URBANFLUXES:   URBan ANthrpogenic heat FLUX from Earth observation Satellites (2015 - 2017) . EU-funded H2020 URBan ANthropogenic heat FLUX from Earth observation Satellites is a Space project on “New ideas for Earth-relevant space applications” aims to investigate the potential of Earth Observation (EO) to retrieve anthropogenic heat fluxes.
  • PROgRESSIon:  PRotOtyping the Retrievals of Energy fluxes and Soil Surface moIsture (2011 - 2013). Understanding Earth system natural processes, as well as the interactions of Earth system components with anthropogenic activities - particularly so in the context of global climate change - has been recognised by the global scientific community as a very urgent and important research direction requiring attention for further investigation. 
  • BRIDGE: The EU-funded FP7 sustainaBle uRban plannIng Decision support accountinG for urban mEtabolism  aimed at bridging the gap between bio-physical sciences and urban planners and to illustrate the advantages of accounting for environmental issues on a routine basis in design decisions.

PUBLICATIONS

  • 2018

    • Christiaan Hummel, Dimitris Poursanidis, Daniel Orenstein, Michael Elliott, Mihai Cristian Adamescu, Constantin Cazacu, Guy Ziv, Nektarios Chrysoulakis, Jaap van der Meer, Herman Hummel,Protected Area management: Fusion and confusion with the ecosystem services approach, Science of The Total Environment, 2018, https://doi.org/10.1016/j.scitotenv.2018.10.033.
    • Chrysoulakis, N., Grimmond, S., Feigenwinter, C,. Lindberg, F., Gastellu-Etchegorry, J., Marconcini, M., Mitraka, Z., Stagakis, S., Crawford, B., Olofson, F., Landier, L., Morrison W., and Parlow, E., 2018. Urban energy exchanges monitoring from space, Scientific Reports, 8, 11498; doi:10.1038/s41598-018-29873-x .
    • Feigenwinter, C., Vogt, R., Parlow, E., Lindberg, F., Marconcini, M., Del Frate, F. and Chrysoulakis, N., 2018. Spatial Distribution of Sensible and Latent Heat Flux in the City of Basel (Switzerland). IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 99, 1-7; doi: 10.1109/JSTARS.2018.2807815 .
    • Panagiotakis, E., Chrysoulakis, N., Charalampopoulou, V. and Poursanidis, D. 2018. Validation of Pleiades Tri-Stereo DSM in Urban Areas. ISPRS Int. J. Geo-Inf. 7, 118. 
    • Pasetto D, Arenas‐Castro S, Bustamante J, et al. Integration of satellite remote sensing data in ecosystem modelling at local scales: Practices and trends. Methods Ecol Evol. 2018;9:1810–1821. doi: 10.1111/2041-210X.13018x .
    • Poursanidis, D., Topouzelis, K., Chrysoulakis, N. 2018. International Journal of Remote Sensing, doi: 10.1080/01431161.2018.1490974 .
    • Prastacos, P., Lagarias, A., 2018. Urban form and transportation infrastructure in European cities, Proceedings Conference on sustainable urban mobility 2018, Skiathos, May 2018.
    • Traganos, D., Poursanidis, D., Aggarwal, B., Chrysoulakis, N., Reinartz, P. 2018. International Journal of Remote Sensing. 10, 859. .
    • Traganos, D.; Aggarwal, B.; Poursanidis, D.; Topouzelis, K.; Chrysoulakis, N.; Reinartz, P. Towards Global-Scale Seagrass Mapping and Monitoring Using Sentinel-2 on Google Earth Engine: The Case Study of the Aegean and Ionian Seas. Remote Sens. 2018, 10, 1227. doi: 10.3390/rs10081227 .

  • 2017
  • 2016
  • 2015
  • 2014
  • 2013

PEOPLE

RESEARCHERS
TECHNICAL SCIENTISTS

CONTACT US

For any information regarding the Spatial Analysis Group, please contact:

Geographic Information Systems & Remote Sensing Group

Institute of Applied and Computational Mathematics

Foundation for Research and Technology - Hellas

Nikolaou Plastira 100, Vassilika Vouton,

GR 700 13 Heraklion, Crete

GREECE


Tel: +30 2810 391800

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.(Mrs. Maria Papadaki - secretary)


Tel.: +30 2810 391805

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.(Mrs. Yiota Rigopoulou - secretary)


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