Recent advances in satellite remote sensing provide the community with an abundance of low-cost spatial information. My research activities include the use of satellite images for monitoring the natural and agricultural environment. I employ digital image analysis techniques and statistical methods to explore vegetation and surface water parameters. Recent interests focus on the influence of changing spatial and temporal scales of satellite observations, precision farming, and soil and vegetation spectroscopy.

Selected research projects

"Joint reference strategies for rural activities of reduced inputs in precision agriculture (AgroLess)", funded by EU-ERDF. My contribution was on the definition of methodologies for pilot studies to promote precision fertilization and irrigation using remote and proximal sensing. More information available at the project's website: http://agrolessproject.eu/

"Merging hydrological models and Earth observation data for reliable information on water (MyWater)", funded by EU-FP7. My contribution was on the definition of methodology for estimating LAI, evapotranspiration and soil moisture at river basin scale. More information available at the project's website: http://mywater-fp7.eu/

"Development of a common intraregional monitoring system for the environmental protection and preservation of the Black Sea (ECO-Satellite)", funded by EU-ENPI. My contribution was on monitoring environmental parameters with remote sensing and GIS. More information available at the project's website: http://www.eco-satellite.eu/

"Agricultural water use estimation in Mediterranean river basins using Earth Observation", funded by the European Space Agency as extension of GSE-Land (http://www.copernicus.eu/projects/gse-land). My contribution was on the refinement of tools for estimating evapotranspiration under Mediterranean conditions.

"Integrated Multiple Level Wetlands Monitoring System Using Innovative Technologies (WETMUST), funded by EC-INTERREG (http://www.wetmust.archimed.gr/ and http://www.ptapde.gr/projects/index.php?id=87&lang=en). My contribution was on the definition of monitoring environmental indicators for wetlands using satellite remote sensing, low flight UAV, geographic analysis.

"Monitoring vegetation status at a national level using mid-low resolution satellite imagery", post-doctoral research awarded through the Operational Programme "Education and Initial Vocational Training" of Greece, which was partially funded by the European Social Fund - European Commission.

"Integrated System for the promotion of Territorial / Environmental Impact Assessment in the frame of spatial development (ISOTEIA)", funded by EC-INTERREG (http://isoteia.maich.gr/).

"Wetlands monitoring using Remote Sensing and GIS", funded by the Greek Ministry of Environment for the participation of Greece in GlobWetland project (http://www.globwetland.org/).

"Revised plan for the restoration of Lake Koronia, Greece", funded by the Prefecture of Thessaloniki.

"Assessment of use of satellite imagery and GIS to control the farmer’s declarations in prefecture of Larissa", contracted by the Greek Organization for Farmer’s Compensation Control (OPEKEPE). My contribution was related to crop distinction using SPOT 5 images, spatial analysis of farmers database.

Contract with the Greek Organization for Farmer’s Compensation Control (OPEKEPE) in the project "Assessment of super-high resolution satellite imagery for control of farmers subsidies declarations". Services related to crop distinction using QuickBird and SPOT images, spatial analysis of farmers database.

"Crop damage assessment from drought using remote sensing and GIS", funded by the Hellenic Organization of Farmers' Compensation (ELGA).

'Remote sensing study of Zhanghe Irrigation System, China', (IWMI - Sri Lanka)

'Water productivity of an irrigation system at different spatial scales using remote sensing and GIS', (IWMI - Sri Lanka)

'Delineation of irrigated crop area in Indus Basin', (IWMI - Pakistan)

'Water performance indicators using satellite images', (IWMI - Pakistan)

'ARTISTS: Arterial Streets Towards Sustainability', (TRIAS S.A. Consulting)

'DATELINE: Design and Application of a Travel Survey for European Long-Distance Trips Based on an International Network of Expertise', (TRIAS S.A. Consulting)

'Master Plan of the sewer network of the City of Thessaloniki', (TRIAS S.A. Consulting)

'Development of a GIS based system for the Thessaloniki sewer system', (TRIAS S.A. Consulting)

Selected publications

Cherif, I., Alexandridis, T.K., Jauch, E., Chambel-Leitao, P., and Almeida, C., 2015. Improving remotely sensed actual evapotranspiration estimation with raster meteorological data. International Journal of Remote Sensing, (accepted on 28/5/15).

Misopolinos, L., Zalidis, C., Liakopoulos, V., Stavridou, D., Katsigiannis, P., Alexandridis, T.K., and Zalidis, G., 2015. Development of a UAV system for VNIR-TIR acquisitions in precision agriculture, Third International Conference on Remote Sensing and Geoinformation of Environment. SPIE, Paphos, Cyprus, pp. 10. [pre-refereeing self archiving]

Alexandridis, T.K., Monachou, S., Skoulikaris, C., Kalopesa, E., and Zalidis, G.C., 2015. Investigation of the temporal relation of remotely sensed coastal water quality with GIS modeled upstream soil erosion. Hydrological Processes, 29: 2373-2384. [pre-print self archiving]

Alexandridis, T.K., Galanis, G., Kalopesa, E., Cherif, I., Chouzouri, A., Dimitrakos, A., Kalopesas, C., Navrozidis, I., Patakas, A., Thomidis, T., and Zalidis, G., 2015. Promoting precision farming in southeast Europe: examples from site-specific management in north Greece, 10th European Conference on Precision Agriculture, Volcani Center, Israel.

Crisman, T.L., Alexandridis, T.K., Zalidis, G.C., and Takavakoglou, V., 2014. Phragmites distribution relative to progressive water level decline in Lake Koronia, Greece. Ecohydrology, 7: 1403-1411. [pre-print self archiving]

Alexandridis, T.K., Sotiropoulou, A.M., Bilas, G., Karapetsas, N., and Silleos, N.G., 2014. The effects of seasonality in estimating the C-factor of soil erosion studies. Land Degradation and Development, DOI: 10.1002/ldr.2223. [pre-print self archiving]

Alexandridis, T.K., Panagopoulos, A., Galanis, G., Alexiou, I., Cherif, I., Chemin, Y., Stavrinos, E., Bilas, G., and Zalidis, G.C., 2014. Combining remotely sensed surface energy fluxes and GIS analysis of groundwater parameters for irrigation system assessment. Irrigation Science, 32(2): 127-140. [pre-print self archiving]

Alexandridis, T.K., Oikonomakis, N., Gitas, I.Z., Eskridge, K.M., and Silleos, N.G., 2014. The performance of vegetation indices for operational monitoring of CORINE vegetation types. International Journal of Remote Sensing, 35(9): 3268-3285. [pre-refereeing self archiving]

Alexandridis, T.K., Dimitrakos, A., Gitas, I.Z., Tompoulidou, M., Mitraki, C., Crisman, T.L., and Zalidis, G., 2014. Identification of transition zones in an evolving lake to wetland ecosystem using object based classification. South-Eastern European Journal of Earth Observation and Geomatics, 3(2S): 617-620. [Journal]

Alexandridis, T.K., Cherif, I., Kalogeropoulos, C., Monachou, S., Eskridge, K., and Silleos, N., 2013. Rapid error assessment for quantitative estimations from Landsat 7 gap-filled images. Remote Sensing Letters, 4(9): 920-928. [pre-refereeing self archiving]

Alexandridis, T.K., Katagis, T., Gitas, I.Z., Silleos, N.G., Eskridge, K.M., and Gritzas, G., 2010. Investigation of aggregation effects (MAUP) in vegetation condition monitoring at a national scale. International Journal of Geographical Information Science, 24(4): 507-521. [pre-refereeing self archiving]

Alexandridis, T.K., Cherif, I., Chemin, Y., Silleos, G.N., Stavrinos, E., Zalidis, G.C., 2009. Integrated methodology for estimating water use in Mediterranean agricultural areas. Remote Sensing, 1(3):445-465. [Journal] [self archiving]

Alexandridis, T.K., E. Lazaridou, A. Tsirika, and G.C. Zalidis, 2009. Using Earth Observation to update a Natura 2000 habitat map for a wetland in Greece. Journal of Environmental Management, 90(7):2243-2251. [Journal] [self archiving]

Crisman T.L., Takavakoglou V., Alexandridis T., Antonopoulos V., and Zalidis G., 2009. Rehabilitation of abandoned saltworks to maximize conservation, ecotourism and water treatment potential. Global Network for Environmental Science and Technology Journal, 11(1):24-31.[Journal] [self archiving]

Alexandridis, T.K., Y. Chemin, I. Cherif, G. Tsakoumis, G. Galanis, G. Arampatzis, G.C. Zalidis, N.G. Silleos, and E. Stavrinos, 2008. Improving spatial resolution of agricultural water use estimation using ALOS AVNIR-2 imagery. In Proceedings of ALOS Principal Investigators Symposium 2008, 03-07 November, Rhodes, Greece. [self archiving]

Alexandridis, Τ.K., G.C. Zalidis, and N.G. Silleos, 2008. Mapping irrigated area in Mediterranean basins using low cost satellite Earth Observation. Computers and Electronics in Agriculture, 64(2):93-103. [Journal] [self archiving]

Alexandridis, Τ.K., C.A. Topaloglou, E. Lazaridou, and G.C. Zalidis, 2008. The performance of satellite images in mapping aquacultures. Ocean and Coastal Management, 51:638-644. [Journal] [self archiving]

Alexandridis, T.K., C.A. Bird, T. Mayr, G. Thomas, and E. Stavrinos, 2008. Terrain and soil influences on ERS-1 SAR image. In: Proceedings of the 4th International Conference on Information and Communication Technologies in Bio and Earth Sciences (HAICTA 2008), September 18-20, Athens, Greece. [self archiving]

Mitrakis, N.E., C.A. Topaloglou, T.K. Alexandridis, J.B. Theocharis, and G.C. Zalidis, 2008. Decision fusion of GA self-organizing neuro-fuzzy multilayered classifiers for land cover classification using textural and spectral features. IEEE Transactions on Geoscience and Remote Sensing, 46(7):2137-2152. [Journal] [self archiving]

Mitrakis, N.E., C.A. Topaloglou, T.K. Alexandridis, J.B. Theocharis and G.C. Zalidis, 2008. A novel self-organizing neuro-fuzzy multilayered classifier for land cover classification of a VHR image. International Journal of Remote Sensing, 29(14):4061-4087. [Journal] [pre-refereeing self archiving]

Alexandridis, T.K., I.Z. Gitas, and N.G. Silleos, 2008. An estimation of the optimum temporal resolution for monitoring vegetation condition on a nationwide scale using MODIS/Terra data. International Journal of Remote Sensing, 29(12): 3589-3607. [Journal] [pre-refereeing self archiving]

Alexandridis, T.K., V. Takavakoglou, G.C. Zalidis, and T.L. Crisman, 2007. Remote sensing and GIS techniques for selecting a self-sustainable scenario for Lake Koronia. Environmental Management, 39(2):278-290. [Journal] [self archiving]

Silleos, N.G., T.K. Alexandridis, I.Z. Gitas, and K. Perakis, 2006. Vegetation Indices: Advances made in Biomass Estimation and Vegetation Monitoring in the last 30 Years. Geocarto International, 21(4):21-28. [self archiving]

Alexandridis, Τ., E. Lazaridou, C. Topaloglou, and G. Zalidis, 2006. Remotely Sensed Baseline Data for Monitoring the Protected Wetland of Delta Axios-Loudias-Aliakmonas. Fresenius Environmental Bulletin, 15(9b):1161-1167. [self archiving]

Chemin Y. and T. Alexandridis, 2006. Water productivity at different geographical scales in Zhanghe Irrigation District, China. International Journal of Geoinformatics, 2(2):9-19. [self archiving]

Chemin, Y. and T. Alexandridis, 2004. Improving spatial resolution of ET seasonal for irrigated rice in Zhanghe, China. Asian Journal of Geoinformatics, 5(1):3-11. [self archiving]