Enter records

ID: 60621
Title: Estimating pinus palustris tree diameter and stem volume from tree height, crown area and stand-level parameters
Author: C.A. Gonzalez-Benecke, Salvador A. Gezan, Lisa J. Samuelson Wendell P. Cropper Jr., Daniel J. Leduc. Timothy A. Martin.
Editor: YANG chuan -ping
Year: 2014
Publisher: The Editorial Board of Journal of Forestry Research.
Source: Centre for Ecological Sciences
Reference: Journal of Forestry Research.vol.25 (1) 43-52 (2014)
Subject: Forestry Research
Keywords: Longleaf pine, diameter -height relationships, crown area, individual -tree stem volume, growth and yield modeling.
Abstract: Accurate and efficient estimation of forest growth and live biomass is a critical element in assessing potential responses to forest management and environmental change. The objective of this study was to develop models to predict longleaf pine tree diameter at breast height (dbh) and merchantable stem volume (V) using data obtained from field measurements. We used longleaf pine tree data from 3,376 planted trees on 127 permanent plots located in the U.S. Gulf Coastal plain region to fit equations to predict dbh as functions of tree height (H) and crown area (CA). Prediction of dbh as a function of H improved when CA was added as an additional independent variable. Similarly, predictions of V based on H improved when CA was included. Incorporation of additional stand variables such as age, site index, dominant height, and stand density were also evaluated but resulted in only small improvements in model performance. For model testing we used data from planted and naturally-regenerated trees located inside and outside the geographic area used for model fitting. Our results suggest that the models area robust alternative for dbh and v estimations when H and CA are known on planted stands with potential for naturally-regenerated stands, across a wide range of ages. We discuss the importance of these models for use with metrics derived from remote sensing data.
Location: T E 15 New Biology Building.
Literature cited 1: Andersen H-E, Reutebuch SE, and Mc Gaughey RJ 2006. Arigorous assessment of tree height measurements obtained using airborne lidar and conventional field methods. Canadian Journal of Remote Sensing, 32: 355-366. Baldwin VC, Saucier JR.1983.Aboveground weight and volume of unthinned, planted longleaf pine on west Gulf Forest Orleans, L.A.Research paper SO-191, p.25.
Literature cited 2: Bi H, Fox JC, Li Y, pang Y. 2012.Evaluation of nonlinear equations for predicting diameter from tree height. Canadian journal of Forest research, 42:1-18 Chen X, Hutley LB, Eamus D.2003.carbon balance of a tropical savanna of northern Australia. Oecologia, 137: 405-416.

ID: 60620
Title: Hydrological impacts of afforestation-A review of research in India.
Author: B. Venkatesh, N. Lakshman, B.K. Purandara.
Editor: YANG chuan -ping
Year: 2014
Publisher: The Editorial Board of Journal of Forestry Research.
Source: Centre for Ecological Sciences
Reference: Journal of Forestry Research.vol.25 (1) 37-42 (2014)
Subject: Forestry Research
Keywords: afforestation, Western Ghats, Experimental watersheds, land-use/cover changes, humid tropics.
Abstract: We review the current status of experimental studies in India to understand the linkages between afforestation and hydrology. This discipline deals with the use and management of water, social awareness of environmental problems, and ecosystem limitations on provision of watershed services by river basins in the mountain regions of India. Our review begins with examination of experimental works in tropical countries and proceeds to discussion of initiatives of Indian research institutes and government organizations towards establishing experimental watersheds to understand the impacts of land cover changes on hydrologic regimes in the Indian -sub-continent. This is followed by the review of the experimental work carried out by various authors to assess the impact of land cover changes on major water balance components such as , runoff, ground water, evapotranspiration and sediment yield. The spatial scales of these experiments have been limited to small watersheds or field plots. This paper also describes impacts of human interventions (such as plantations of exotic forest species to restore degraded landscapes) on the water balance components in diverse hydro-geo-environmental conditions in the Indian sub-continent. We focus on identifying the research areas which require immediate attention to develop tools to assist planners and policy makers in assessing and managing the water resources in these complex environments. The review is largely based on research results reported during the last 20-30 years.
Location: T E 15 New Biology Building.
Literature cited 1: Anonymous 2003.Annual Report 2002-2003.CSWCRTI, Dehradun, pp. 50-51. Anonymous, 2005.Annual Report 2004-05, CSWCRTI, Dehradun.
Literature cited 2: Beven KJ, Krikby MJ. 1979. A physically based variable contribution area model of basin hydrology. Hydrological sciences Bulletin, 24: 43-69. Bonell M. 1991.Progress and future research needs in water catchment conversion within the wet tropical coast of north-east Queensland. In: N.

ID: 60619
Title: Governance of forest conservation and co-benefits for Bangladesh under changing climate.
Author: Ronju Ahammad, Mohammed Hossain, Panna Husnain.
Editor: YANG chuan -ping
Year: 2014
Publisher: The Editorial Board of Journal of Forestry Research.
Source: Centre for Ecological Sciences
Reference: Journal of Forestry Research.vol.25 (1) 29-36 (2014)
Subject: Forestry Research
Keywords: REDD+ (Reducing Emissions from Deforestation and Forest Degradation in Developing countries). Conservation, institution, livelihood, protected areas.
Abstract: We focused on key aspects of forest governance for biodiversity conservation in implementing new climate change policies. The national forest institutions must be adaptive to identify the existing pitfalls of prior conservation policies to take advantage of new climate change policies. Strengthening roles and technical capacity of national institutions for systematic biodiversity monitoring and carbon stock assessment is required in developing and least developed countries. Community participation needs careful analysis to ensure equitable access of particular social groups to local decision-making processes and to sustain optional livelihoods. The livelihood options around forest reserves or protected areas must e taken into account to enhance forest-based adaption.
Location: T E 15 New Biology Building.
Literature cited 1: Agrawal A, Chhatre A, Hardin R. 2008.Changing Governance of the world ' s forests. Science, 320(5882): 1460-1462. Ahmad BC, Hashim MHI, Abdullah J, Jaafar J.2012. Stakeholders ' perception on buffer zone potential implementation: a preliminary study of a TasekBera, M ' sia. Procedia-social and Behavioral sciences, 50: 582-590.
Literature cited 2: Arts B, Buizer M.2009. Forests, discources, institutions: A discursive-institutional analysis of global forest governance. Forest policy and Economics, 11; 340-347. Berkes F, Kofinas PG, Chapin SF.2009.Conservation, community, and live lihoods: sustaining, renewing, and adapting cultural connections to the land.

ID: 60618
Title: Biodiversity and ecological assessments of Indian sacred groves.
Author: Rajasri Ray, M.D.S. Chandran, T. V. Ramachandra
Editor: YANG chuan -ping
Year: 2014
Publisher: The Editorial Board of Journal of Forestry Research.
Source: Centre for Ecological Sciences
Reference: Journal of Forestry Research.vol.25 (1) 21-28 (2014)
Subject: Forestry Research
Keywords: biodiversity, conservation, ecosystem service, endemics, sacred grove.
Abstract: Sacred groves are patches of forests preserved for their spiritual and religious significance. The practice gained relevance with the spread of agriculture that caused large-scale deforestation affecting biodiversity and watersheds. Sacred groves may lose their prominence nowadays, but are still relevant in Indian rural landscapes inhabited by traditional communities. The recent rise of interest in this tradition encouraged scientific study that despite its pan-Indian distribution focused on India ' s northeast, Western Ghats and east coast either for their global/regional importance or unique ecosystems. Most studies focused on flora, mainly angiosperms, and the faunal studies concentrated on vertebrate while lower life forms were grossly neglected. Studies on ecosystem functioning are few although observations are available .Most studies attributed watershed protection values to sacred groves but hardly highlighted hydrological process or water yield in comparison with other land use types. The grove studies require diversification from stereotyped path and must move towards creating credible scientific foundations for conservation. Documentation should continue in unexplored areas but more work is needed on basic ecological functions and ecosystem dynamics to strengthen planning for scientifically sound sacred grove management.
Location: T E 15 New Biology Building.
Literature cited 1: Ahmed M F, 2004.Bird diversity of sacred groves of cherrapunjee, Meghalaya, India. Technical Report, Aaranyak, pp. 1-19. Ambinakudige S, Satish B.N.2009.Comparing tree diversity and composition in coffee farms and sacred forests in the Western Ghats of India. Biodiversity and conservation, 18: 987-1000.
Literature cited 2: Anthwal A, Sharma RC, Sharma A. 2006. Sacred groves: traditional way of conserving plant diversity in Garhwal Himalaya, Uttranchal.The Journal of American Science, 2(2): 35-38. Arunachalam A, Arunachalam K, Pandey HN, Tripathi RS. 1998. Fine litter-fall and nutrient dynamics during forest regrowth in the humid subtropics of north-eastern India. Forest Ecology and Management, 110: 209-219.

ID: 60617
Title: Afforestation, restoration and regeneration -Not all tees are created equal.
Author: Shanekha S. Lawson. Charles H. Michler
Editor: YANG chuan -ping
Year: 2014
Publisher: The Editorial Board of Journal of Forestry Research.
Source: Centre for Ecological Sciences
Reference: Journal of Forestry Research.vol.25 (1) 3-20(2014)
Subject: Forestry Research
Keywords: Age detection, oil palm, WorldView-2, Object-based image analysis.
Abstract: Undulations in weather patterns have caused climate shifts of increased frequency and duration around the world. The need for additional research and model data on this pressing problem has resulted in a plethora of research groups examining a particular tree species or biome for negative effects of climate change. This review aims to (1) collect and merge recent research data on regeneration within old-and new-growth forests, (2) highlight and expand upon selected topics for additional discussion, and (3) report how shade tolerance ,drought tolerance, and inherent plasticity affect tree growth and development. Although shade and drought tolerance have been well studied by a number of research groups, this review reveals that in- depth analysis of a single or a few species in a given area will not generate the data required to implement a successful regeneration plan. Studies using historical accounts of previous species composition, information regarding site seasonality, species competition, and individual responses to drought and shade are needed to (1) develop best management plans and (2) ensure future modeling experiments are focused on a greater variety of species using more innovative methods to evaluate climate change effects.
Location: T E 15 New Biology Building.
Literature cited 1: Alvarez-Alvarez P, Barrio-Anta M, Camara-Obregon A, dos Santos-Bento JMR. 2013. Ground vegetation as an indicator of site quality: effect of non-site factors on the productivity of newly established chestnut plantations in northwestern Spain. J For Res, 18(5): 407-417. Antos JA, Parish R. Nigh GD.2010. Effects of neighbours on crown length of Abies lasiocarpa and picea engelmannii in two old-growths stands in British Columbia.can JFor Res, 18(5): 407-417.
Literature cited 2: Andrews DM, Barton CD, Czapka SJ, Kolka RK, Sweeney Bw.2010. Influence of trees shelters on seedling success in an affrosted riparian zone. New Forest, 39(2): 157-167. Akhavan R, Sagheb-Talebi K, Zenner EK, Safavimnesh F. 2012. Spatial patterns in different forest development stages of an intact old-growth oriental beech forest in the Caspian region of Iran. Eur J Forest Res, 131(5): 1355-1366.

ID: 60616
Title: Determination of the age of oil palm from crown projection area detected from WorldView-2 multispectral remote sensing data: The case of Ejisu-Juaben district, Ghana.
Author: Abel Chemura, Iris van Duren, Louise M.van Leeuwen.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 118-127 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: Age detection, oil palm, WorldView-2, Object-based image analysis.
Abstract: Information about age of oil palm is important in sustainability assessments, carbon mapping, yield projections and precision agriculture. The aim of this study was to develop and test an approach to determine the age of oil palm plantations (years after planting) by combining high resolution multispectral remote sensing data and regression techniques using a case study of Ejisu-Juaben district of Ghana. Firstly, we determined the relationship between age and crown projection area of oil palms fr45om sample fields. Secondly, we did hierarchical classification using object based image analysis techniques on WorldView-2 multispectral data to determine the crown projection areas of oil palms from remote sensing data. Finally, the crown projection areas obtained from the hierarchical classification were combined with the field-developed regression model to determine the age of oil palms at field level for a wider area. Field collected data showed a strong linear relationship between age and crown area of oil palm up to 13 years beyond which no relationship was observed. A user ' s accuracy of 80.6 % and a producer ' s accuracy of 68.4 % were obtained for the delineation of oil palm crowns while for delineation of non-crown objects a user ' s accuracy of 65.6 % and a producer ' s accuracy of 78.6 % were obtained, with an overall accuracy of 72.8 % for the OBIA delineation. Automatic crown projection area delineation from remote sensing data produced crown projection areas which closely matched the field measured crown areas except for older oil palms (13 + years) where the error was greatest. Combining the remote sensing detected crown projection area and the regression model accurately estimated oil palm ages for 27.9 % of the fields and had an estimation error of 1 year or less for 74.6% of the fields an error of a maximum 2 years for 92.4 % of the fields. The results showed that 6 and 11 year old oil palm stands were dominating age categories in the study area. Although the method could be reliably applied for estimating oil palm age at field level, more attention is required in improving crown area delineation to improve the accuracy of the approach.
Location: T E 15 New Biology Building.
Literature cited 1: Abdi, H., Molin, P., 2007. Lilliefors/Van Soest ' s test of normality. Encyclopedia Meas. Stat, 540-544. Addink, E.A., de Jong, S.M., Pebesma, E.J., 2007. The importance of scale in object-based maping of vegetation parameters with hyperspectral imagery. Photogramm. Eng.Remote Sens. 73 (8), 90-912.
Literature cited 2: Alfatni, M.S.M., Shariff, A.R.M., Abdullah, M.Z., Marhaban, M.H., Shafie, S.B., Saaed, OM.B., 2013. Recognition system of oil palm fruit bunch types based on texture feature and image processing techniques.Adv.Sci.Lett. 19 (12), 3441-3444. Anornu, G.K., Kortatsi, B.K., Saeed, Z.M., 2009. Evaluation of groundwater resources potential in the Ejisu-Juaben district of Ghana.Afr.J.Environ.Sci.Technol 3 (10), 332-340.

ID: 60615
Title: Integrating SAR and derived products into operational volcano monitoring and decision support systems.
Author: F.J. Meyer, D.B. McAlpin, W.Gong, O. Ajadi, S. Arko, P.W. Webley, J. Dehn.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 106-117 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: Hazards, Volcanoes, Change detection, monitoring, SAR, Decision support, Performance, Multisensor.
Abstract: Remote sensing plays a critical role in operational volcano monitoring due to the often remote locations of volcanic systems and the large spatial extent of potential eruption pre-cursor signals. Despite the all-weather capabilities of radar remote sensing and its high performance in monitoring of change, the contribution or radar data to operational monitoring activities has been limited in the past. This is largely due to: (1) the high costs associated with radar data; (2) traditionally slow data processing and delivery procedures; and (3) the limited temporal sampling provided by spaceborne radars. With this paper, we allow for a meaningful integration of radar data into operational volcano monitoring decision support systems. Specifically, we present fast data access procedures as well as sampling of volacanic systems with SAR data. We introduce phase-based (coherent) and amplitude-based (incoherent) change detection procedures that are able to extract dense time series of hazard information from these data. For a demonstration, we present an integration of our processing system with an operational volcano monitoring system that was developed for use by the Alaska Volcano Observatory (AVO). Through an application to a historic eruption, we show that the integration of SAR into systems such as AVO can significantly improve the ability of operational systems to detect eruptive precursors. Therefore, the developed technology is expected to improve operational hazard detection, alerting, and management capabilities.
Location: T E 15 New Biology Building.
Literature cited 1: Amelung, F., Jonsson, S., Zebker, H., Segall, P., 2000a. Widespread uplift and ' trapdoor ' faulting on Galpagos volcanoes observed withradar interferometry. Nature 407 (6807), 993-996. Amelung, F., Oppenheimer, C., Segall, P., Zebker, H., 2000b. Ground deformation near Gada ?Ale Volcano, Afar, observed by radar interferometry.Geophys.Res.Lett.27 (19), 3093-3096.
Literature cited 2: Arnoult, K., Olson, J., Szuberla, C., McNutt, S., Garces, M., Fee, D., Hedlin, M., 2010. Infrasound observations of the 2008 explosive eruptions of Okmok and Kasatochi volcanoes.J.Geophys.Res.115, DOOL15. Attema, E., Bargellini, P., Edwards, P., Levrini, G., Lokas, S., Moeller, L., Rosich-Tell, B., Secchi, P., Torres, R., Davidson, M., 2007 .Sentinel-1-the radar mission for GMES operational land and sea services. ESABull.131, 10-17.

ID: 60614
Title: Persistent scatterers at building facades-Evaluation of appearance and localization accuracy.
Author: Stefan Gernhardt, Stefan Auer, Konrad Eder.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 92-105 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: Urban, SAR, Simulation, Understanding, Pont cloud, Accuracy.
Abstract: Thanks to the high resolution of modern SAR satellites many persistent scatterers (PS) appear at single buildings. Approximately half of them represent building facades. These groups of points often show regular patterns in SAR images that can be related to repeating structure elements on the facades. Hence, individual buildings can now be monitored over time, either based on amplitude (for change detection) or phase information (using interferometric methods). However, patterns of point signatures are often disrupted or disappear when the imaging geometry is slightly changed. In addition, the localization accuracy of estimated and geocoded natural PS is not known, yet. The investigation at hand provides a detailed analysis of PS patterns based on reference data obtained from a photogrammetric survey and terrestrial measurements. The processing of the optical images allows creating a detailed 3D model of the respective fa?ade, which represents the geometrical object information for SAR simulation. The terrestrial measurements allow relating the 3D model to its true position in a world coordinate system like UTM (Universal Transverse Mercator), which is necessary for assessing the localization accuracy of the signatures. From the simulation results the appearance of the point patterns of natural PS in high resolution SAR data can be better understood. Moreover, the localization accuracy and precision for these points can be derived for the first time. The approach and findings for two case studies in Munich are described in detail in this paper.
Location: T E 15 New Biology Building.
Literature cited 1: Adam, N., Eineder, M., Yague-Martinez, N., Bamler, R., 2008. High resolution interferometric stacking with TerraSAR-X. In: Proceedings of IEEE International Geoscinece and Remote Sensing Symposium, pp. 117-120. Adam, N., Kampes, B., Eineder, M., 2004. Development of a scientific permanent scatterer system: modifications for mixed ERS/ENVISAT time series. In: Proceedings of Envisat &ERS Symposium, pp. 117-120.
Literature cited 2: Auer, S., 2011. 3D Synthetic Aperture Radar Simulation for Interpreting Complex Urban Reflection Scenarios.Ph.Dthesis, Deutsche Geodatische commission, Reihe C, Nr. 660, Verlag der Bayerischen Akademie der Wissenschaften, 126p.URL:<http://dgk.badw.de/fileadmin/docs/c-660.pdf>. Auer, S., Gernhardt, S., Bamler, R., 2011. Ghost persistent scatterers related to multiple signal reflections.Geosc.Remote Sens.Lett 8 (5), 919-923.

ID: 60613
Title: Measuring thermal expansion using X-band persistent scatterer interferometry.
Author: Michele Crosetto, Oriol Monserrat, Maria Cuevas-Gonzalez, Nuria Devanthery, Guido Luzi.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 84-91 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: Thermal expansion, Very high resolution imagery, SAR, Interferometry, TerraSAR-X, Ground-based SAR
Abstract: This paper is focused on the estimation of the thermal expansion of buildings and infrastructures using X-band Persistent Scatterer Interferometry (PSI) observations. For this purpose an extended PSI model is used, which allows separating the thermal expansion from the total observed deformation thus generating a new PSI product: the map of the thermal expansion parameter, named thermal map. The core of the paper is devoted to the exploitation of the information contained in the thermal maps: three examples are discussed in detail, which concern a viaduct, a set of industrial buildings and two skyscrapers. The thermal maps can be used to derive the thermal expansion coefficient of the observed objects and information on their static structure. In addition, the paper illustrates the distortions in the PSI deformation products that occur if the thermal expansion is not explicitly modeled. Finally, an inter-comparison exercise is described, where the thermal expansion coefficients estimated by PSI are compared with those derived by a Ku-band ground-based SAR campaign.
Location: T E 15 New Biology Building.
Literature cited 1: Bell, J.W., Amelung, F., Ferretti, A., Bianchi, M., Novali, F., 2008. Permanent scatterer InSAR reveals seasonal and long-term aquifer-system response to groundwater pumping and artificial recharge. Water Resour. Res. 44, W02407. http://dx.doi.org/10.1029/2007WR006152. Burgmann, R., Hilley, G.E., Ferretti, A., Novali, F., 2006. Resolving vertical tectonics in the San Francisco Bay area from permanent scatterer InSAR and GPS analysis. Geology 34 (3), 221-224.
Literature cited 2: Colesanti, C., Le Mouelic, S., Bennani, M., Raucoules, D., Carnec, C., Ferretti, A., 2005. Detection of mining related ground instabilities using the permanent scatterers technique-a case study in the east of France.Int. J. Remote Sens.26 (1), 201- 207. Crosetto, M., Agudo, M., Monserrat, O., Pucci B., 2007. Inter-comparison of persistant scatterer interferometry results. In: Proceedings of the Fringe 2007 Workshop, 26-30 November 2007, Frascati, Italy. http://earth.esa.int/workshops/fringe07/papers/papers_posters/s7_5cros.pdf.

ID: 60612
Title: Classification of airborne laser scanning data using JointBoost.
Author: Bo Guo, Xianfeng Huang, Fan Zhang, Gunho Sohn.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 71-83 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: LiDAR, Classification, JointBoost, Feature, Contextual, Point Cloud.
Abstract: The demands for automatic point cloud classification have dramatically increased with the wide-spread use of airborne LiDAR. Existing research has mainly concentrated on a few dominant objects such as terrain, buildings and vegetation. In addition to those key objects, this paper proposes a supervised classification method to identify other types of objects including power-lines and pylons from point clouds using a JointBoost classifier. The parameters for the learning model are estimated with various features computed based on geometry and echo information of a LiDAR point cloud. In order to overcome the shortcomings stemming from the inclusion of bare ground data before classification, the proposed classifier directly distinguishes terrain using a feature step-off count. Feature selection is conducted using JointBoost to evaluate feature correlations thus improving both classification accuracy and operational efficiency. In this paper, the contextual results obtained by the JointBoost classifier. Our experimental results show that the step-off count significantly contributes to classification. Seventeen effective features are selected for the initial classification results using the JointBoost classifier. Our experiments indicate that the proposed features and method are effective for classification of airborne LiDAR data from complex scenarios.
Location: T E 15 New Biology Building.
Literature cited 1: Bishop, C.M., 2006. Pattern Recognition and Machine Learning. Springer, New York. Boykov, Y., Funka-Lea, G., 2006. Graph cuts and efficient N-D image segmentation. Int. J. Comput. Vision 70 (2), 109-131.
Literature cited 2: Boykov, Y., Veksler, O., Zabih, R., 2001. Fast approximate energy minimization via graph cuts. IEEE Trans.Pattern Anal.Mach.Intell. 23 (11), 1222-1239. Charlton, M., Coveney, S., Mccarthy, T., 2009. Issues in Laser scanning. In: Heritage, G., Large, A. (Eds). Laser Scanning for The Environmental Sciences. Wiley-Blackwell, London, pp. 35-48.

ID: 60611
Title: Evaluation and comparison of different radargrammewtic approaches for Digital Surface Models generation from COSMO-SkyMed, TerraSAR-X, RADARSAT-2 imagery: Analysis of Beauport (Canada) test site.
Author: P.Capaldo, A. Nascetti, M. Porfiri, F. Pieralice, F. Fratarcangeli, M. Crespi, T. Toutin.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 60-70 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: High resolution SAR imagery, Radargrammetry, Orientation models, Digital Surface Models.
Abstract: In this manuscript we analyze the potentialities of the radargammetric DSMs generation using high resolution SAR imagery acquired by three different platforms (COSMO-SkyMed, TerraSAR-Xand RADARSAT-2), with particular attention to geometric orientation models. Two orientation models are considered and compared: Toutin ' s model (Canada Center for Remote Sensing), implemented in the commercial software package PCI-Geomatica and based on Ground Control Points (GCPs), and the radargrammetric model implemented in the scientific software SISAR (University of Rome La Sapienza), based on images metadata orbital information only. Moreover, a comparison between the DSMs following the image matching approaches implemented in PCI-Geomatica and SISAR has been performed. The analysis has been carried out over Beauport test site (Quebec, Canada), where three overlapping stereopairs, one for each of the mentioned platform, were acquired and a LiDAR ground truth and a dense set of GNSS Check points (CPs) are available. The presented results appear promising: DSMs accuracy are within 4 and 5m for all sensors, independently from orientation model (with or without GCP) and image matching approach, provided good relative orientation is guaranteed, what mainly attains to the quality of metadata orbital information.
Location: T E 15 New Biology Building.
Literature cited 1: Balz, T., Zhang, L., Liao, M., 2013. Direct stereo radargrammetric processing using massively parallel processing. ISPRS J.Photogramm.Remote Sens. 79, 137-146. Bonafoni, S., Mazzoni, A., Cimini, D., Montopoli, M., Pierdicca, N., Basili, P., Ciotti, P., Carlesimo, G., 2013. Assessment of water vapor retrievals from a GPS receiver network.GPS Solut 17 (4), 475-484, <www. Scopus.com>.
Literature cited 2: Capaldo, P., 2013. High Resolution Radargrammetry w3ith COSMO-SkyMed, TerraSAR-X and RADARSAT-2Imagery: Development and Implementation of an Image Orientation Model for Digital Surface Model Generation PhD Thesis. University of Rome La Sapienza, Faculty of Engineering. Capaldo, P., Crespi, M., Fratarcangeli, F., Nascetti, A., Pieralice, F., 2011. High-resolution SAR radargrammetry: a first application with COSMO-SkyMed spotlight imagery.IEEE Geosci.Remote Sens. Lett. 8 (6), 1100-1104.

ID: 60610
Title: Measurement of ground displacement from optical satellite image correlation using the free open-source software MicMac
Author: Ana-Maria Rosu, Marc Pierrot-Deseilligny, Arthur Delorme, Renaud Binet, Yann Klinger.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 48-59 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: Satellite image, Ground displacement, Image correlation, COSI-Corr, Medicis, MicMac.
Abstract: Image correlation is one of the most efficient techniques to determine horizontal ground displacements due to earthquakes, landslides, ice flows or sand dune migrations. Analyzing these deformations allows a better understanding of the causes and mechanisms of the events. By using sub-pixel correlation on before-and after-event ortho-images obtained from high resolution satellite images it is possible to compute the displacement field with high planimetric resolution. In this paper, we focus on measuring the ground displacements due to seismotectonic events. The three sub-pixel correlators used are: COSI-Corr-developed by Cltech, a free, closed-source correlator, dependent on commercial software (ENVI) and widely used by the geoscience community for measuring ground displacement; Medicis -developed by IGN, the free open-source correlator we study and tune for measuring fine ground displacements. We measured horizontal ground deformation using these three correlators on SPOT images in three study cases: the 2001 kokoxili earthquake, the 2005 dyke intrusion in the Afar depression and the 2008 Yutian earthquake.
Location: T E 15 New Biology Building.
Literature cited 1: Ayele, A., Jacques, E., Kassim, M., Kidane, T., Omar, A., Tait, S., Nercessian, A., de Chabalier, J.-B, King, G., 2007. Earth Planetary Sci.Lett. 255, 177-187. http://dx.doi.org/10.1016/j.eps/.2006.12.014. Ayoub, F., Leprince, S., Keene, L., 2009. User ' s Guide to COSI-CORR, Co-registration of Optically Sensed Images andCorrelation.http://tectonics.caltech.edu/slip_history/spot_coseis.>
Literature cited 2: Barisin, I., Leprince, S., Parsons, B., Wright, T., 2009. Surface displacements in the September 2005.Earth Afar rifting event from satellite image matching: asymmetric uplift and faulting.Geophys.Res.Lett 36 (L07301).http://dx.doi.org/10.1029/2008GL036431. Bicheron, P., Amberg, V., Bourg, L, Petit, D., Huc, M., Miras, B., Brockmann, C., Delwart, S., Ranera, F., Hagolle, O., Leroy, M., Arino, O., 2011. Geolocation assessment of MERIS GlobCover orthorectified products.IEEE Trans. Geosci.Remote Sens. 49 (8), 2972-2982. http://dx.doi.org/10.1109/TGRS2011.2122337.

ID: 60609
Title: Radiometric and geometric evaluation o fGeoEYe-1, WorldView-2 and Pleiades-1A stereo images for 3D information extraction.
Author: D.Poli, F. Remondino, E. Angiuli, G. Agugiaro.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 35-47 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: Very High Resolution, Radiometry, Geometry, DSM, Quality assessment, Quantitative analysis.
Abstract: Today the use of spaceborne Very High Resolution (VHR) optical sensors for automatic 3D information extraction is increasing in the scientific and civil communities. The 3D Optical Metrology (3DOM) unit of the Bruno Kessler Foundation (FBK) in Trento (Italy) has collected VHR satellite imagery, as well as aerial and terrestrial data over Trento for creating a complete test field for investigations on image radiometry, geometric accuracy, automatic digital surface model (DSM) generation, 2D/3D feature extraction, city modeling and data fusion. This paper addresses the radiometric and geometric aspects of theVHR spaceborne imagery included in the Trento testfield and their potential for 3D information extraction. The dataset consist of two stereo-pairs acquired by WorldView-2 and GeoEye-1 in panchromatic and multispectral mode, and a triplet from Pleiades-1A. For reference and validation, a DSM from airborne LiDAR acquisition is used. The paper gives details on the project, dataset characteristics an achieved results.
Location: T E 15 New Biology Building.
Literature cited 1: 4DiXplorer AG website, 2013.http://www.4dixplorer.com (access 02.14). Agugiaro, G., Poli, D., Remondino, F., 2012. Testfield Trento: geometric evaluation of very high resolution satellite imagery.Int.Arch.Photogrammetry, Remote Sens. Spatial Informat.Scdi. 39 (1), 191-196.
Literature cited 2: Aguilar, M.A., Saldana, M.d.M., Aguilar, F.J., 2013. Generation and quality assessment of stereo-extracted DSM from Geo-Eye-1 and WorldView-2 imagery. IEEE Trans.Geosci.Remote Sens.52 (6), 11259-11271. Astrium, 2012.Pleiades Imagery User Guide. October 2012-v2.0.

ID: 60608
Title: Coregistration refinement of hyperspectral images and DSM: An object-based approach using spectral information.
Author: Janja Avbelj, Dorota Iwaszczczuk, Rupert Muller, Peter Reinartz, Uwe Stilla.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 23-34 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: Hyper spectral, DEM/DTM, Registration, Multisensor, Urban, Matching.
Abstract: For image fusion in remote sensing applications the georeferencing accuracy using position, attitude, and camera calibration measurements can be insufficient. Thus, image processing techniques should be employed for precise coregistration of images. In this article a method for multimodal object-based image coregistration refinement between hyperspectral images (HIS) and digital surface models (DSM) is presented. The method is divided in three parts: object outline detection in HIS and DSM, matching, and determination of transformation parameters. The novelty of our proposed coregistration refinement method is the use of material properties and height information of urban objects from HIS and DSM, respectively. We refer to urban objects as objects which are typical in urban environments and focus on buildings by describing them with 2D outlines. Furthermore, the geometric accuracy of these detected building outlines is taken into account in the matching step and for the determination of transformation parameters. Hence, a stochastic model is introduced to compute optimal transformation parameters. The feasibility of the method is shown by testing it on two aerial HSI of different spatial and spectral resolution, and two DSM of different spatial resolution. The evaluation is carried out by comparing the accuracies of the transformations parameters to the reference parameters, determined by considering object outlines at much higher resolution, and also by computing the correctness and the quality rate of the extracted outlines before and after coregistration refinement. Results indicate that using outlines of objects instead of only line segments is advantageous for coregistration of HSI and DSM. The extraction of building outlines in comparison to the line cue extraction provides a larger amount of assigned lines between the images and is more robust to outliers, i.e. false matches.
Location: T E 15 New Biology Building.
Literature cited 1: Avbelj, J., 2012. Spectral information retrieval for sub-pixel building edge detection. ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. 1 (7), 61-66. http://dx.doi.org/10.5194/isprsannals-1-7-61-2012, ISSN 2194-9050. Avbelj, J., Iwaszczuk, D., Muller, R., Reinartz, P., Stilla, U., 2013. Line-based registration of DSM and hyperspectral images. Int. Arch.Photogramm. Remote Sens.Spatial Inf.Sci. XL (1/W1), 13-18. http://dx.dopi.org/10.5194/isprsarchives-XL-1-W1-13-2013, ISSN 1682-1777.
Literature cited 2: Awrangjeb, M., Ravanbakhsh, M., Fraser, C.S., 2010. Automatic detection of residential buildings using LIDAR data and multispectral imagery. ISPRS J. Photogramm.Remot Sens. 65 (5), 457-467. http://dx.doi.org/10.1016/j.isprsjprs.2009.06.004. Blaschke, T., 2010. Object based image analysis for remote sensing. ISPRS J. Photogramm. Remote Sens. 65 (1), 2-16. http://dx.doi.org/10.1016/j.isprsjprs.2009.06.004.

ID: 60607
Title: Automated bias-compensation of rational polynomial coefficients of high resolution satellite imagery based on topographic maps.
Author: Jeohong Oh, Changno Lee.
Editor: Derek Lichti
Year: 2015
Publisher: Elsevier B.V.
Source: Centre for Ecological Sciences
Reference: PHOTOGRAMMETRY AND REMOTE SENSING Vol 100 14-22 (2015)
Subject: Photogrammetry and Remote Sensing
Keywords: High-resolution satellite imagery, Georeferencing, RPCs, Bias-compensation, Digital topographic map, RECC.
Abstract: As the need for efficient methods to accurately update and refine geospatial satellite image databases is increasing. We have proposed the use of 3-dimensional digital maps for the fully-automated RPCs bias compensation of high resolution satellite imagery. The basic idea is that the map features are scaled and aligned to the image features, except for the local shift, through the RPCs-based image projection, and then the shifts are automatically determined over the entire image space by template-based edge matching of the heterogeneous data set. This enables modeling of RPCs bias compensation parameters for accurate geoereferencing. The map features are selected based on four suggested rules. Experiments were carried out for three Kompsat-2 images and stereo IKONOS images with1: 5000 scale Korean national topographic maps. Image matching performance is discussed with justification of the parameter selection, and the georeferencing accuracy is analyzed. The experimental results showed the automated approach can achieve one-pixel level of georeferencing accuracy, enabling economical hybrid map creation as well as large scale map updates.
Location: T E 15 New Biology Building.
Literature cited 1: Baarda, W., 1968. A Testing Procedure for use in Geodetic Networks, vol. 2 (5). Netherlands Geodetic Commission, Publications on Geodesy, New Series, 97 pp. Dowman, I.J., Morgado, A., Vohra, V., 1996.Automatic registration of images with maps using polygonal features. Int.Arch.Photogramm.Remote Sens. 31 (B3), 139-145.
Literature cited 2: Euroconsult, 2010 .Satellite-Based Earth Observation, Market Prospects to 2018, Paris. Fraser, C.S., Hanley, H.B., 2005. Bias-compensated RPCs for sensor orientation of high-resolution satellite imagery.Photogramm.Eng.Remote Sens. 71 (8). 909-915.