Deutsch Intern
Earth Observation Research Cluster

Prof. Dr. Tobias Ullmann

Department of Remote Sensing

   +49 (0)931 31-86865
   +49 (0)931 31-85544
 tobias.ullmann@uni-wuerzburg.de

Institute of Geography and Geology
John Skilton Str. 4a
97074 Würzburg

Room 01.B.025
1st floor

upon request

  • Development and testing of (semi-)empirical models to derive bio-physical parameters for habitat characterization, biomass estimation, derivation of surface roughness and land surface temperature from satellite-based Earth observation data in different geozones
  • Development of multi-sensor approaches based on Earth observation archives to derive physical surface properties and their temporal change/dynamics for tropical regions with a view to landscape and climate change and the resulting ecological consequences
  • Integration of Earth observation data in physical geographic research (geomorphology, geoarchaeology, and paleoenvironmental research) with emphasis on polar, semiarid, and arid regions and using SAR data, multispectral optical satellite imagery, and digital terrain models
  • Development and testing of classification and change detection techniques using (Pol)(In)SAR data and multispectral Earth observation archives to characterize the land surface over time; including using InSAR coherence change analysis, machine learning, and cloud-based processing
  • Application of SAR time series, especially InSAR, to record periglacial dynamics in alpine and polar regions against the background of climate change
  • Expansion of interdisciplinary cooperation with neighboring disciplines, especially biology, ecology, and agricultural and forest sciences
  • Deepening the knowledge transfer with regard to the new possibilities of satellite-based, airborne and ground-based (drones, UAV/UAS) remote sensing systems.

since 10/2023
Full University Professor W2 (Remote Sensing in Geography) at the Department of Remote Sensing of the University of Würzburg

since 10/2021
“Akademischer Oberrat auf Zeit“ at the Department for Physical Geography of the University of Würzburg

09/2021                       
Habilitation at the University of Würzburg. Title of the thesis: “Raum-zeitliche Analyse von Geosystemen mittels satellitengestützter Erdbeobachtung: Beispiele zur Anwendung multipler Synthetic Aperture Radar (SAR) Daten, multispektral-optischer Zeitserien und Digitaler Geländemodelle im Kontext physisch-geographischer Forschung“

10/2015 - 09/2021
“Akademischer Rat auf Zeit“ at the Department for Physical Geography of the University of Würzburg

02/2015 – 10/2015
Academic staff member at the Department for Physical Geography of the University of Würzburg

10/2011 – 07/2015
Doctorate (Dr. rer. nat.) at the Graduate School of Science & Technology (GSST) of the University of Würzburg. Title of the thesis: “Characterization of Arctic Environment by Means of Polarimetric Synthetic Aperture Radar (PolSAR) Data and Digital Elevation Models (DEM)“

03/2011 – 09/2011
Diploma in cooperation with EADS ASTRIUM GEO-information Services (infoterra GmbH) and the “Deutschen Fernerkundungsdatenzentrum (DFD), Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)“ Title of the thesis: “Nutzen von polarimetrischen TerraSAR-X Daten für die Charakterisierung der Landbedeckung tropischer Regionen“

10/2005 – 09/2011
Studies of Geography at the University of Würzburg with majors in Physical Geography and Remote Sensing and minors in Geology and Statistics

2024[ to top ]
  • Rieder, J. S.; Link, R. M.; Köthe, K.; Seidel, D.; Ullmann, T.; Žmegač, A.; Zang, C.; Schuldt, B. (2024): TreeCompR: Tree competition indices for inventory data and 3D point clouds. In: Methods in Ecology and Evolution
  • Löw, J.; Hill, S.; Otte, I.; Thiel, M.; Ullmann, T.; Conrad, C. (2024): How Phenology Shapes Crop-Specific Sentinel-1 PolSAR Features and InSAR Coherence across Multiple Years and Orbits. In: Remote Sensing, 16 (2791), 26.
  • {Aida Taghavi-Bayat, T. U.; Gerke, M. (2024): Detecting soil freeze-thaw dynamics with C-band SAR over permafrost in Northern Sweden and seasonally frozen grounds in the Tibetan Plateau, China. In: International Journal of Remote Sensing, 45 (16), 5317-58.
  • Liepa, A.; Thiel, M.; Taubenböck, H.; Steffan-Dewenter, I.; Abu, I.-O.; Singh Dhillon, M.; Otte, I.; Otim, M. H.; Lutaakome, M.; Meinhof, D.; Martin, E. A.; Ullmann, T. (2024): Harmonized NDVI time-series from Landsat and Sentinel-2 reveal phenological patterns of diverse, small-scale cropping systems in East Africa. In: Remote Sensing Applications: Society and Environment, 35, 101230.
  • Gilardi, L.; Erbertseder, T.; Baier, F.; Paeth, H.; Ullmann, T.; Taubenböck, H. (2024): The Influence of Commuting on Population Exposure to Air Pollution: Toward Global Application With a Proxy on the Degree of Urbanization. In: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 17, 12720-30.
  • Rösch, M.; Nolde, M.; Ullmann, T.; Riedlinger, T. (2024): Data-Driven Wildfire Spread Modeling of European Wildfires Using a Spatiotemporal Graph Neural Network. In: Fire, 7 (6)
2023[ to top ]
  • Schäfer, C.; Fäth, J.; Kneisel, C.; Baumhauer, R.; Ullmann, T. (2023): Multidimensional hydrological modeling of a forested catchment in a German low mountain range using a modular runoff and water balance model. In: Frontiers in Forests and Global Change, 6
  • Dhillon, M. S.; Dahms, T.; Kübert-Flock, C.; Liepa, A.; Rummler, T.; Arnault, J.; Steffan-Dewenter, I.; Ullmann, T. (2023): Impact of {STARFM} on Crop Yield Predictions: Fusing {MODIS} with Landsat 5, 7, and 8 {NDVIs} in Bavaria Germany. In: Remote Sensing, 15 (6), 1651.
  • Kanmegne Tamga, D.; Latifi, H.; Ullmann, T.; Baumhauer, R.; Thiel, M.; Bayala, J. (2023): Modelling the spatial distribution of the classification error of remote sensing data in cocoa agroforestry systems. In: Agroforestry Systems, 97 (1), 109-19.
  • Dhillon, M. S.; Dahms, T.; Kuebert-Flock, C.; Rummler, T.; Arnault, J.; Steffan-Dewenter, I.; Ullmann, T. (2023): Integrating random forest and crop modeling improves the crop yield prediction of winter wheat and oil seed rape. In: Frontiers in Remote Sensing, 3, 1010978.
  • Dhillon, M. S.; Dahms, T.; Kuebert-Flock, C.; Rummler, T.; Arnault, J.; Stefan-Dewenter, I.; Ullmann, T. (2023): Integrating random forest and crop modeling improves the crop yield prediction of winter wheat and oil seed rape. In: Frontiers in Remote Sensing, 3
  • Ullmann, T.; Jagdhuber, T.; Hoffmeister, D.; May, S. M.; Baumhauer, R.; Bubenzer, O. (2023): Exploring Sentinel-1 backscatter time series over the Atacama Desert (Chile) for seasonal dynamics of surface soil moisture. In: Remote Sensing of Environment, 285, 113413.
2022[ to top ]
  • Dhillon, M. S.; Dahms, T.; Kübert-Flock, C.; Steffan-Dewenter, I.; Zhang, J.; Ullmann, T. (2022): Spatiotemporal Fusion Modelling Using STARFM: Examples of Landsat 8 and Sentinel-2 NDVI in Bavaria. In: Remote Sensing, 14 (3), 677.
  • Nill, L.; Grünberg, I.; Ullmann, T.; Gessner, M.; Boike, J.; Hostert, P. (2022): Arctic shrub expansion revealed by Landsat-derived multitemporal vegetation cover fractions in the Western Canadian Arctic. In: Remote Sensing of Environment, 281, 113228.
  • Buchelt, S.; Skov, K.; Rasmussen, K. K.; Ullmann, T. (2022): Sentinel-1 time series for mapping snow cover depletion and timing of snowmelt in Arctic periglacial environments: case study from Zackenberg and Kobbefjord, Greenland. In: The Cryosphere, 16 (2), 625-46.
  • Ullmann, T.; Möller, E.; Baumhauer, R.; Lange-Athinodorou, E.; Meister, J. (2022): A new Google Earth Engine tool for spaceborne detection of buried palaeogeographical features – examples from the Nile Delta (Egypt). In: E&G Quaternary Science Journal, 71 (2), 243-47.
  • Kanmegne Tamga, D.; Latifi, H.; Ullmann, T.; Baumhauer, R.; Thiel, M.; Bayala, J. (2022): Modelling the spatial distribution of the classification error of remote sensing data in cocoa agroforestry systems. In: Agroforestry Systems, 11.
  • Buchelt, S.; Skov, K.; Rasmussen, K. K.; Ullmann, T. (2022): Sentinel-1 time series for mapping snow cover depletion and timing of snowmelt in {Arctic} periglacial environments: case study from {Zackenberg} and {Kobbefjord}, {Greenland}. In: The Cryosphere, 16 (2), 625-46.
  • Lappe, R.; Ullmann, T.; Bachofer, F. (2022): State of the {Vietnamese} {Coast}—{Assessing} {Three} {Decades} (1986 to 2021) of {Coastline} {Dynamics} {Using} the {Landsat} {Archive}. In: Remote Sensing, 14 (10), 2476.
  • Rösch, M.; Sonnenschein, R.; Buchelt, S.; Ullmann, T. (2022): Comparing PlanetScope and Sentinel-2 Imagery for Mapping Mountain Pines in the Sarntal Alps, Italy. In: Remote Sensing, 14 (13), 3190.
  • Kanmegne Tamga, D.; Latifi, H.; Ullmann, T.; Baumhauer, R.; Bayala, J.; Thiel, M. (2022): Estimation of {Aboveground} {Biomass} in {Agroforestry} {Systems} over {Three} {Climatic} {Regions} in {West} {Africa} {Using} {Sentinel}-1, {Sentinel}-2, {ALOS}, and {GEDI} {Data}. In: Sensors, 23 (1), 349.
  • Kanmegne Tamga, D.; Latifi, H.; Ullmann, T.; Baumhauer, R.; Bayala, J.; Thiel, M. (2022): Estimation of Aboveground Biomass in Agroforestry Systems over Three Climatic Regions in West Africa Using Sentinel-1, Sentinel-2, ALOS, and GEDI Data. In: Sensors, 23 (349), 18.
2021[ to top ]
  • Cuthbertson, P.; Ullmann, T.; Büdel, C.; Varis, A.; Namen, A.; Seltmann, R.; Reed, D.; Taimagambetov, Z.; Iovita, R. (2021): Correction: {Finding} karstic caves and rockshelters in the {Inner} {Asian} mountain corridor using predictive modelling and field survey. In: Plos one, 16 (4), e0250142.
  • Arendt, R.; Reinhardt-Imjela, C.; Schulte, A.; Faulstich, L.; Ullmann, T.; Beck, L.; Martinis, S.; Johannes, P.; Lengricht, J. (2021): Natural {Pans} as an {Important} {Surface} {Water} {Resource} in the {Cuvelai} {Basin}—{Metrics} for {Storage} {Volume} {Calculations} and {Identification} of {Potential} {Augmentation} {Sites}. In: Water, 13 (2), 177.
  • Cuthbertson, P.; Ullmann, T.; Büdel, C.; Varis, A.; Namen, A.; Seltmann, R.; Reed, D.; Taimagambetov, Z.; Iovita, R. (2021): Finding karstic caves and rockshelters in the {Inner} {Asian} mountain corridor using predictive modelling and field surveyhg. von Andrea Zerboni. In: Plos one, 16 (1), e0245170.
  • Meister, J.; Lange-Athinodorou, E.; Ullmann, T. (2021): Preface: {Special} issue “{Geoarchaeology} of the {Nile} {Delta}”. In: E\&G Quaternary Science Journal, 70 (2), 187-90.
  • Meister, J.; Garbe, P.; Trappe, J.; Ullmann, T.; Es-Senussi, A.; Baumhauer, R.; Lange-Athinodorou, E.; El-Raouf, A. A. (2021): The {Sacred} {Waterscape} of the {Temple} of {Bastet} at {Ancient} {Bubastis}, {Nile} {Delta} ({Egypt}). In: Geosciences, 11 (9), 385.
  • Stanley, J.-D.; Ullmann, T.; Lange-Athinodorou, E. (2021): Holocene {Aridity}-{Induced} {Interruptions} of {Human} {Activity} along a {Fluvial} {Channel} in {Egypt}’s {Northern} {Delta}. In: Quaternary, 4 (4), 39.
2020[ to top ]
  • Ullmann, T.; Nill, L.; Schiestl, R.; Trappe, J.; Lange-Athinodorou, E.; Baumhauer, R.; Meister, J. (2020): Mapping buried paleogeographical features of the {Nile} {Delta} ({Egypt}) using the {Landsat} archive. In: E\&G Quaternary Science Journal, 69 (2), 225-45.
  • Ullmann, T.; Stauch, G. (2020): Surface {Roughness} {Estimation} in the {Orog} {Nuur} {Basin} ({Southern} {Mongolia}) {Using} {Sentinel}-1 {SAR} {Time} {Series} and {Ground}-{Based} {Photogrammetry}. In: Remote Sensing, 12 (19), 3200.
  • Forkuor, G.; Ullmann, T.; Griesbeck, M. (2020): Mapping and Monitoring Small-Scale Mining Activities in Ghana using Sentinel-1 Time Series (2015{\textendash}2019). In: Remote Sensing, 12 (6), 911.
  • Forkuor, G.; Ullmann, T.; Griesbeck, M. (2020): Mapping and {Monitoring} {Small}-{Scale} {Mining} {Activities} in {Ghana} using {Sentinel}-1 {Time} {Series} (2015–2019). In: Remote Sensing, 12 (6), 911.
2019[ to top ]
  • Nill, L.; Ullmann, T.; Kneisel, C.; Sobiech-Wolf, J.; Baumhauer, R. (2019): Assessing {Spatiotemporal} {Variations} of {Landsat} {Land} {Surface} {Temperature} and {Multispectral} {Indices} in the {Arctic} {Mackenzie} {Delta} {Region} between 1985 and 2018. In: Remote Sensing, 11 (19), 2329.
  • Ahmadian, N.; Ullmann, T.; Verrelst, J.; Borg, E.; Zölitz, R.; Conrad, C. (2019): Biomass {Assessment} of {Agricultural} {Crops} {Using} {Multi}-temporal {Dual}-{Polarimetric} {TerraSAR}-{X} {Data}. In: PFG – Journal of Photogrammetry, Remote Sensing and Geoinformation Science, 87 (4), 159-75.
  • Lange-Athinodorou, E.; El-Raouf, A. A.; Ullmann, T.; Trappe, J.; Meister, J.; Baumhauer, R. (2019): The sacred canals of the {Temple} of {Bastet} at {Bubastis} ({Egypt}): {New} findings from geomorphological investigations and {Electrical} {Resistivity} {Tomography} ({ERT}). In: Journal of Archaeological Science: Reports, 26, 101910.
  • Ullmann, T.; Serfas, K.; Büdel, C.; Padashi, M.; Baumhauer, R. (2019): Data {Processing}, {Feature} {Extraction}, and {Time}-{Series} {Analysis} of {Sentinel}-1 {Synthetic} {Aperture} {Radar} ({SAR}) {Imagery}: {Examples} from {Damghan} and {Bajestan} {Playa} ({Iran}). In: Zeitschrift für Geomorphologie, Supplementary Issues, 62 (1), 9-39.
  • Ullmann, T.; Lange-Athinodorou, E.; Göbel, A.; Büdel, C.; Baumhauer, R. (2019): Preliminary results on the paleo-landscape of {Tell} {Basta} /{Bubastis} (eastern {Nile} delta): {An} integrated approach combining {GIS}-{Based} spatial analysis, geophysical and archaeological investigations. In: Quaternary International, 511, 185-99.
  • Kunz, J.; Kneisel, C.; Ullmann, T.; Baumhauer, R. (2019): Multi-methodological investigation of permafrost related landforms in the {Northwest} {Territories}, {Canada}
2017[ to top ]
  • Ullmann, T.; Büdel, C.; Baumhauer, R. (2017): Characterization of {Arctic} {Surface} {Morphology} by {Means} of {Intermediated} {TanDEM}-{X} {Digital} {Elevation} {Model} {Data}. In: Zeitschrift für Geomorphologie, Supplementary Issues, 61 (1), 3-25.
  • Ullmann, T.; Banks, S. N.; Schmitt, A.; Jagdhuber, T. (2017): Scattering {Characteristics} of {X}-, {C}- and {L}-{Band} {PolSAR} {Data} {Examined} for the {Tundra} {Environment} of the {Tuktoyaktuk} {Peninsula}, {Canada}. In: Applied Sciences, 7 (6), 595.
  • Banks, S.; Millard, K.; Behnamian, A.; White, L.; Ullmann, T.; Charbonneau, F.; Chen, Z.; Wang, H.; Pasher, J.; Duffe, J. (2017): Contributions of {Actual} and {Simulated} {Satellite} {SAR} {Data} for {Substrate} {Type} {Differentiation} and {Shoreline} {Mapping} in the {Canadian} {Arctic}. In: Remote Sensing, 9 (12), 1206.
2016[ to top ]
  • Tobias, U.; Christian, B.; Roland, B.; Majid, P. (2016): Sentinel-1 {SAR} {Data} {Revealing} {Fluvial} {Morphodynamics} in {Damghan} ({Iran}): {Amplitude} and {Coherence} {Change} {Detection}. In: International Journal of Earth Science and Geophysics, 2 (1)
  • Ullmann, T.; Schmitt, A.; Jagdhuber, T. (2016): Two {Component} {Decomposition} of {Dual} {Polarimetric} {HH}/{VV} {SAR} {Data}: {Case} {Study} for the {Tundra} {Environment} of the {Mackenzie} {Delta} {Region}, {Canada}. In: Remote Sensing, 8 (12), 1027.
  • Lange, E.; Ullmann, T.; Baumhauer, R. (2016): Remote sensing in the {Nile} {Delta}: {Spatio}-{Temporal} {Analysis} of {Bubastis} / {Tell} {Basta}. In: Ägypten und Levante, 26, 377-92.
2015[ to top ]
  • Lange-Athinodorou, E. (2015): Goddess on the water: research on the sacred landscape of {Bubastis}. In: Egyptian Archaeology, 47, 17-19.
  • Kuenzer, C.; Klein, I.; Ullmann, T.; Georgiou, E.; Baumhauer, R.; Dech, S. (2015): Remote {Sensing} of {River} {Delta} {Inundation}: {Exploiting} the {Potential} of {Coarse} {Spatial} {Resolution}, {Temporally}-{Dense} {MODIS} {Time} {Series}. In: Remote Sensing, 7 (7), 8516-42.
2014[ to top ]
  • Ullmann, T.; Schmitt, A.; Roth, A.; Duffe, J.; Dech, S.; Hubberten, H.-W.; Baumhauer, R. (2014): Land {Cover} {Characterization} and {Classification} of {Arctic} {Tundra} {Environments} by {Means} of {Polarized} {Synthetic} {Aperture} {X}- and {C}-{Band} {Radar} ({PolSAR}) and {Landsat} 8 {Multispectral} {Imagery} — {Richards} {Island}, {Canada}. In: Remote Sensing, 6 (9), 8565-93.
2013[ to top ]
  • Ullmann, T.; Schmitt, A.; Roth, A.; Banks, S.; Baumhauer, R.; Dech, S. (2013): {CLASSIFICATION} {OF} {COASTAL} {ARCTIC} {LAND} {COVER} {BY} {MEANS} {OF} {TERRASAR}-{X} {DUAL} {CO}-{POLARIZED} {DATA}
2012[ to top ]
  • Beyhan, B.; Taubenböck, H.; Suffa, S.; Ullmann, T.; Rauh, J.; Dech, S. (2012): Urban {Growth} and {Sprawl} of {Mersin} {City}, {Turkey}: {Change} analysis based on {Earth} {Observation} and {Socio}-{Economic} {Data}. In: Megaron, 7, 3-25.
2011[ to top ]
  • Esch, T.; Schenk, A.; Ullmann, T.; Thiel, M.; Roth, A.; Dech, S. (2011): Characterization of {Land} {Cover} {Types} in {TerraSAR}-{X} {Images} by {Combined} {Analysis} of {Speckle} {Statistics} and {Intensity} {Information}. In: IEEE Transactions on Geoscience and Remote Sensing, 49 (6), 1911-25.
  • Esch, T.; Schenk, A.; Ullmann, T.; Thiel, M.; Roth, A.; Dech, S. (2011): Characterization of Land Cover Types in TerraSAR-S Images by Combined Analysis of Speckle Statistics and Intensity Information. In: IEEE Transactions on Geoscience and Remote Sensing, 49 (6), 1911-25.
2010[ to top ]
  • Esch, T.; Schenk, A.; Thiel, M.; Ullmann, T.; Schmidt, M.; Dech, S. (2010): Land cover classification based on single-polarized {VHR} {SAR} images using texture information derived via speckle analysis. In: 2010 {IEEE} {International} {Geoscience} and {Remote} {Sensing} {Symposium}Seiten, 1875-78.
2009[ to top ]
  • Scheuchl, B.; Ullmann, T.; Koudogbo, F. (2009): Change {Detection} using high resolution {TerraSAR}-{X} data preliminary results. In: Remote Sensing and Spatial Information Sciences, 38