Search Results - "Schardt, Mathias"

Use of SAR and Optical Time Series for Tropical Forest Disturbance Mapping by Hirschmugl, Manuela, Deutscher, Janik, Sobe, Carina, Bouvet, Alexandre, Mermoz, Stéphane, Schardt, Mathias

“…Frequent cloud cover and fast regrowth often hamper topical forest disturbance monitoring with optical data. This study aims at overcoming these limitations by…”
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The Epipolarity Constraint in Stereo-Radargrammetric DEM Generation by Gutjahr, Karlheinz, Perko, Roland, Raggam, Hannes, Schardt, Mathias

“…For stereometric processing of optical image pairs, the concept of epipolar geometry is widely used. It helps to reduce the complexity of image matching, which…”
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A Near Real-Time Method for Forest Change Detection Based on a Structural Time Series Model and the Kalman Filter by Puhm, Martin, Deutscher, Janik, Hirschmugl, Manuela, Wimmer, Andreas, Schmitt, Ursula, Schardt, Mathias

“…The increasing availability of dense time series of earth observation data has incited a growing interest in time series analysis for vegetation monitoring and…”
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Mapping Forest Degradation due to Selective Logging by Means of Time Series Analysis: Case Studies in Central Africa by Hirschmugl, Manuela, Steinegger, Martin, Gallaun, Heinz, Schardt, Mathias

“…Detecting and monitoring forest degradation in the tropics has implications for various fields of interest (biodiversity, emission calculations,…”
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Combined Use of Optical and Synthetic Aperture Radar Data for REDD+ Applications in Malawi by Hirschmugl, Manuela, Sobe, Carina, Deutscher, Janik, Schardt, Mathias

“…Recent developments in satellite data availability allow tropical forest monitoring to expand in two ways: (1) dense time series foster the development of new…”
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Methods for Mapping Forest Disturbance and Degradation from Optical Earth Observation Data: a Review by Hirschmugl, Manuela, Gallaun, Heinz, Dees, Matthias, Datta, Pawan, Deutscher, Janik, Koutsias, Nikos, Schardt, Mathias

“…Purpose of Review This paper presents a review of the current state of the art in remote sensing-based monitoring of forest disturbances and forest degradation…”
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Potential of Modern Photogrammetry Versus Airborne Laser Scanning for Estimating Forest Variables in a Mountain Environment by Ullah, Sami, Dees, Matthias, Datta, Pawan, Adler, Petra, Schardt, Mathias, Koch, Barbara

“…Digital stereo aerial photographs are periodically updated in many countries and offer a viable option for the regular update of information on forest…”
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Forest Assessment Using High Resolution SAR Data in X-Band by Perko, Roland, Raggam, Hannes, Deutscher, Janik, Gutjahr, Karlheinz, Schardt, Mathias

“…Novel radar satellite missions also include sensors operating in X-band at very high resolution. The presented study reports methodologies, algorithms and…”
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Mapping Tropical Rainforest Canopy Disturbances in 3D by COSMO-SkyMed Spotlight InSAR-Stereo Data to Detect Areas of Forest Degradation by Deutscher, Janik, Perko, Roland, Gutjahr, Karlheinz, Hirschmugl, Manuela, Schardt, Mathias

“…Assessment of forest degradation has been emphasized as an important issue for emission calculations, but remote sensing based detecting of forest degradation…”
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Drought Impact on Phenology and Green Biomass Production of Alpine Mountain Forest—Case Study of South Tyrol 2001–2012 Inspected with MODIS Time Series by Katarzyna Ewa Lewińska, Eva Ivits, Mathias Schardt, Marc Zebisch

“…Ecological balance and biodiversity of the alpine forest is endangered by global and local climatic extremes. It spurs a need for comprehensive forest…”
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Remote Sensing Based Two-Stage Sampling for Accuracy Assessment and Area Estimation of Land Cover Changes by Gallaun, Heinz, Steinegger, Martin, Wack, Roland, Schardt, Mathias, Kornberger, Birgit, Schmitt, Ursula

“…Land cover change processes are accelerating at the regional to global level. The remote sensing community has developed reliable and robust methods for…”
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The assessment of forest parameters by combined LiDAR and satellite data over Alpine regions - EUFODOS Implementation in Austria / Hodnotenie parametrov lesa kombináciou LIDAR-u a satelitných údajov v alpských regiónoch - implementácia systému EUFODOS v Rakúsku by Schardt, Mathias, Granica, Klaus, Hirschmugl, Manuela, Deutscher, Janik, Mollatz, Michael, Steinegger, Martin, Gallaun, Heinz, Wimmer, Andreas, Linser, Stefanie

“…Regional authorities require detailed and georeferenced information on the status of forests to ensure a sustainable forest management. One of the objectives…”
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Single tree detection in very high resolution remote sensing data by Hirschmugl, Manuela, Ofner, Martin, Raggam, Johann, Schardt, Mathias

“…Tree detection is a major focus in the field of (semi-) automatic extraction of forest information from very high resolution remote sensing data. Many existing…”
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EU-wide maps of growing stock and above-ground biomass in forests based on remote sensing and field measurements by Gallaun, Heinz, Zanchi, Giuliana, Nabuurs, Gert-Jan, Hengeveld, Geerten, Schardt, Mathias, Verkerk, Pieter J.

“…The overall objective of this study was to combine national forest inventory data and remotely sensed data to produce pan-European maps on growing stock and…”
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Alpine Forest Drought Monitoring in South Tyrol: PCA Based Synergy between scPDSI Data and MODIS Derived NDVI and NDII7 Time Series by Lewinska, Katarzyna Ewa, Ivits, Eva, Schardt, Mathias, Zebisch, Marc

“…Observed alternation of global and local meteorological patterns governs increasing drought impact, which puts at risk ecological balance and biodiversity of…”
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Assessment of the Stereo-Radargrammetric Mapping Potential of TerraSAR-X Multibeam Spotlight Data by Raggam, H., Gutjahr, K., Perko, R., Schardt, M.

“…TerraSAR-X can acquire image data in various resolutions down to a range of about 1 m. Moreover, the sensor can operate at various imaging beams and thus…”
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Assessment of the Stereo-Radargrammetric Mapping Potential of TerraSAR-X Multibeam Spotlight Data: SPECIAL ISSUE ON TERRASAR-X: MISSION, CALIBRATION, AND FIRST RESULTS by RAGGAM, Hannes, GUTJAHR, Karlheinz, PERKO, Roland, SCHARDT, Mathias

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Representation of an alpine treeline ecotone in SPOT 5 HRG data by Hill, Ross A., Granica, Klaus, Smith, Geoff M., Schardt, Mathias

“…An ecotone is a zone of vegetation transition between two communities, often resulting from a natural or anthropogenic environmental gradient. In remotely…”
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EU-wide maps of growing stock and above-ground biomass in forests based on remote sensing and field measurements : European Forest carbon balance as assessed with inventory based methods by GALLAUN, Heinz, ZANCHI, Giuliana, NABUURS, Gert-Jan, HENGEVELD, Geerten, SCHARDT, Mathias, VERKERK, Pieter J

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DEM-based epipolar rectification for optimized radargrammetry by Perko, Roland, Gutjahr, Karlheinz, Kruger, Maria, Raggam, Hannes, Schardt, Mathias

“…The quality of DEMs derived via radargrammetry mainly depends on the similarity of the SAR stereo images, taken under different look angles, in the image…”
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