Ehlers, M. and I. Hijazi, 2009. 3D Web GIS Campus requirements: A Case Study for the University of Osnabrück. In: Reinhardt, W., A. Krüger, M. Ehlers (Eds.), 2009. Geoinfor-matik 2009, Konferenzband, ifgiprints 35, Münster, p. 233.

Schiewe, J., M. Ehlers, C. Kinkeldey und D. Tomowski, 2009. Modellierung von Unsicherheiten in klassifizierten, räumlich hoch aufgelösten Fernerkundungsszenen. Publikationen der Deutschen Gesellschaft für Photogrammetrie, Fernerkundung und Geoinformation, Band 18, pp. 93-100.

Hijazi, I. and M. Ehlers, 2009. Web 3D Routing in and between Buildings. Proceedings, Fourth National GIS Symposium, May 4-6, 2009, Al-Khobar, Saudi Arabia (CD Publica-tion), 11 pp.

Klonus, S. und M. Ehlers, 2009. Auswirkungen der Bildfusion auf Hyperspektraldaten. Publikationen der Deutschen Gesellschaft für Photogrammetrie, Fernerkundung und Geoinfor-mation, Band 18, pp. 277-286.

Klonus, S. und M. Ehlers, 2009. Vergleich von unterschiedlichen Verfahren zur Fusion von TerraSAR-X und optischen Daten. Publikationen der Deutschen Gesellschaft für Photog-rammetrie, Fernerkundung und Geoinformation, Band 18, pp. 327-336.

Klonus, S. und M. Ehlers, 2009. Performance of Evaluation Methods in Image Fusion. Proceedings, 12th International Conference on Information Fusion, Seattle, WA, USA (CD Publication), 8 pp.

Schiewe, J., M. Ehlers, C. Kinkeldey und D. Tomowski, 2009. Implementation of Indeterminate Transition Zones for Uncertainty Modeling in Classified Remotely Sensed Scenes. Proceedings, AGILE 2009, Hannover (CD Publication), 8 pp.

Klonus, S. und M. Ehlers, 2009. Additional Benefit of Image Fusion Method from Combined High Resolution TerraSAR-X and Multispectral SPOT Data for Classification. Proceedings, 29th Annual EARSeL Symposium, Chania, Kreta (CD Publication), 8 pp.

Ehlers, M. and I. Hijazi, 2009. Building a 3D Web GIS Using Open Source Software (OSS) and Open Specification (OS): A Case Study for the University of Osnabrück. Proceedings, 6th International Symposium on Digital Earth (ISDE6), Beijing, China (CD Publication), 13 pp.

Ehlers, M. and I. Hijazi, 2009. Prototype Application for Web 3D Routing in Buildings. Proceedings, 6th International Symposium on Digital Earth (ISDE6), Beijing, China (CD Pub-lication), 8 pp.

Hijazi, I., M. Ehlers and S. Zlatanova, 2009. A Framework for IFC-CityGML Automatic Transformation for Geo-Analysis Purposes, Use Case: Water Utility Network. Proceedings, 3D Geo-Info, Ghent, Belgien, (CD Publication), 4 pp.

Ehlers, M., 2008. Data Integration and Fusion Techniques for Environmental Monitoring. Proceedings, Sino-German Workshop on Advanced Technologies of Remote Sensing and its Application in Understanding Earth Processes, Beijing, China, pp. 84-85.

Ehlers, M., S. Klonus and P. J. Åstrand, 2008. Quality Assessment for Multi-Sensor Multi-Date Image Fusion. Proceedings of the XXIth International Congress of ISPRS, Beijing, China, IAPRS XXXV/B4, pp. 499-506.

Rosso, P.H., S. Klonus, M. Ehlers and E. Tschach, 2008. Comparative Properties of four Airborne Sensors and their Applicability to Land Surface Interpretation. Proceedings of the XXIth International Congress of ISPRS, Beijing, China, IAPRS XXXV/B1, pp. 545-550.

Michel, U., C. Plass, C. Tschritter and M. Ehlers, 2008. WebMoZis – Web-based and Mobile Zoo Information System: A Case Study for the City of Osnabrueck. Proceedings of the XXIth International Congress of ISPRS, Beijing, China, IAPRS XXXV/B4, pp. 839-844.

Kopka, A., M. Ehlers and J. Schiewe, 2008. Moderate Resolution Satellite Data in Forest Monitoring Systems. Proceedings of the XXIth International Congress of ISPRS, Beijing, China, IAPRS XXXV/B4, pp. 1471-1476.

Ehlers, M., 2007. Segment Based Image Analysis and Image Fusion. Proceedings of ASPRS 2007 Annual Convention "Identifying Geospatial Solutions", Tampa, Florida (CD Publica-tion), 12 pp.

Michel, U., S. Klonus, M. Ehlers and P. J. Åstrand, 2007. Image Fusion with Multitemporal and Multisensoral Data. Proceedings of 27th EARSeL Symposium - Geoinformation in Europe (CD Publication), 7 pp.

Ehlers, M., U. Michel und K. Stroemer, 2007. Navigation – mehr als Autos: Radroutenplanung im Internet, Kartographie – Ihnen werden wir’s zeigen. Kartographische Schriften, Band 14, Kirschbaum Verlag, pp. 35-41.

Ehlers, M., 2007. Remote Sensing and GIS Fusion Techniques for Environmental Mapping and Monitoring. Proceedings, 32nd International Symposium on Remote Sensing of Envi-ronment, San Jose, Costa Rica (CD Publication), 4 pp.

Tomowski, D., M. Ehlers, U. Michel and G. Bohmann, 2006. Decision Based Data Fusion Techniques for Settlement Area Detection from Multisensor Remote Sensing Data. Proceedings, 1st Workshop of the EARSeL Special Interest Group Urban Remote Sensing, Ur-ban Remote Sensing: Challenges and Solutions, Berlin-Adlershof, (CD Publication), 8 pp.

Ehlers, M., U. Michel, G. Bohmann and D. Tomowski, 2006. Decision Based Data Fusion Techniques for the Analysis of Settlement Areas from Multisensor Remote Sensing Data. Proceedings of ASPRS 2006 Annual Convention “Prospecting for Geospatial Integration”, Reno, Nevada (CD Publication), 8 pp.

Schiewe, J., M. Ehlers und N. de Lange, 2006. Einführung von Bachelor- und Master-Programmen "Geoinformatik" an der Universität Osnabrück. Tagungsband der 2. GIS-Ausbildungstagung, Potsdam (CD Publikation), 4 pp.

Kastler, T. und M. Ehlers, 2006. FerGI Courses – ein Weiterbildungsangebot für kleine und mittelständische Unternehmen. Tagungsband der 2. GIS-Ausbildungstagung, Potsdam (CD Publikation), 2 pp.

Michel, U., M. Ehlers, G. Bohmann and D. Tomowski, 2006. Advanced Fusion Techniques for Automated Detection of Settlement Areas. Proceedings, ISPRS Comm VII Symposium "From Pixels to Processes", Enschede, The Netherlands, (CD Publication), 5 pp.

Ehlers, M., A. Greiwe, D. Tomowski, 2006. On Segment Based Image Fusion, Proceedings First International Conference on Object-Based Image Analysis (OBIA 2006). Salzburg, (CD Publication), 7 pp.

Ehlers, M., 2005. Urban Remote Sensing: New Developments and Trends. Proceedings, 5th International Symposium Remote Sensing of Urban Areas (URS 2005), Tempe, AZ, USA (CD Publication), 6 pp.

Greiwe, A. and M. Ehlers, 2005. Combined Analysis of Hyperspectral and High Resolution Image Data in an Object Oriented Classification Approach. Proceedings, 5th International Symposium Remote Sensing of Urban Areas (URS 2005), Tempe, AZ, USA (CD Publication), 6 pp.

Greiwe, A. and M. Ehlers, 2005. A Segment-Based Reference Spectra Definition for Multisensor Image Data, 4th Workshop on Imaging Spectroscopy "Imaging Spectroscopy. New quality in environmental studies". Warschau, 2005 (CD Publication), 6 pp.

Ehlers, M., 2005. Beyond Pansharpening: Advances in Data Fusion for Very High Resolution Remote Sensing Data. Proceedings, ISPRS Workshop "High-Resolution Earth Imaging for Geospatial Information", Hannover (CD Publication), 6 pp.

Schiewe, J., M. Ehlers und E. Wagner, 2005. E-Learning Projekt "Fernstudienmaterialien Geoinformatik" (FerGI): Konzeption, erste Ergebnisse und Beitrag für die Zukunft. Tagung "Innnovationen in Aus- und Weiterbildung mit GIS", Potsdam (CD Publication), 13 pp.

Gottschalk, T., F. Huettmann and M. Ehlers, 2005. Thirty Years of Analysing and Modelling Avian Habitat Relationships Using Satellite Imagery Data. Extended Abstracts, XXVIIth Congress of the International Union of Game Biologists, Hannover, Germany, p. 250.

Ehlers, M., U. Michel, G. Bohmann und D. Tomowski, 2005. Entscheidungsbasierte Datenfusion von multisensoralen Fernerkundungsdaten zur Erkennung von Siedlungsgebieten. Vorträge der 25. wissenschaftlich-technische Jahrestagung der DGPF, Publikationen der Deutschen Gesellschaft für Photogrammetrie, Fernerkundung und Geoinformation, Nr. 14, pp. 209-216.

Ehlers, M., 2005. Neue Sensoren und Methoden in der Fernerkundung: Zwischen hochauflö-send und hyperspektral. Beiträge Diskussionsforum Bodenwissenschaften, Fakultät Agrarwissenschaften & Landschaftsarchitektur, FH Osnabrück, Heft 6, pp. 7-16.

Ehlers, M., 2004. New Remote Sensing Systems for Coastal Monitoring: Experiences in Germany. Abstracts, International Science Conference ‘60 Years of Remote Sensing of Natural Resources’, VIIKAM, St. Petersburg, p. 52. 

Ehlers, M., R.Welch, Y. Ling, 2004. GIS and Context Based Image Enhancement. Proceedings of the XXth International Congress of ISPRS, Istanbul, Turkey, IAPRS XXXV/B4, pp. 397-402.

Ehlers, M., 2004. Image Fusion without Changes in Spectral Characteristics: FFT Based Filtering and IHS Transform. Proceedings of the 10th Annual Conference on Control with Remote Sensing of Area-based Subsidies, Budapest, Hungary, pp. 279-291.

Na, Y., M. Ehlers, W. Yang, Y. Li, 2004. Imaging Mechanism Based Remote Sensing Image Fusion with Multi-Wavelet Transform. Proceedings, Seventh International Conference on Signal Processing ICSP’04, Beijing, China, pp. 2190-2194.

Na, Y., M. Ehlers, W. Yang, C. Sun, 2004. Panchromatic and Multi-Spectral Image Fusion with Multi-Wavelet Transform. Proceedings, MapAsia 2004, p. 33.

Ehlers, M., S. Klonus, C. Aden, H. Bast, T. Buchholz, T. Kreutzer, L. Loesewitz, 2004. IHS Transform revisited: Spectral Characteristics Preserving Data Fusion Based on Fourier Domain Filtering. Proceedings, 1st Göttingen GIS and Remote Sensing Days "Environmental Studies", Göttingen, 8 pp.

Ehlers, M., R. Janowsky and M. Gähler, 2003. Ultra High Resolution Airborne Scanner for Environmental Monitoring. Proceedings of ASPRS 2003 Annual Convention, Anchorage, Alaska (CD Publication), 8 pp.

Ehlers, M., R. Janowsky and M. Gähler, 2003. Coastal Change Monitoring in Northern Ger-many: New Sensors and Methods. Proceedings, International Colloquium on Studying Land Use Effects in Coastal Zones with Remote Sensing and GIS, Kemer, Türkei, pp. 20-29.

Bochow, M., A. Greiwe and M. Ehlers, 2003. Ein Prozessmodell zur Analyse von Hyperspektraldaten in urbanen Gebieten. Tagungsband der 23. wissenschaftlich-technischen Jahrestagung der DGPF, Bochum, pp. 255-264.

Ehlers, M., 2002. Remote Sensing for Environmental Monitoring: New Developments and Concepts. In: Woldai, T. (Ed.) Deposits and Geoenvironmental Models for Resources Ex-ploitation and Environmental Security II, ITC Publication 82, pp. 23-24.

Ehlers, M., S. Jung and K. Stroemer, 2002. Design and Implementation of a GIS Based Bicycle Routing System for the World Wide Web (WWW). Proceedings, Joint International Symposium on Geospatial Theory, Processing and Applications, Ottawa, Ontario, IAPRS XXXIV-4, pp. 425-429 (auch als CD Publikation).

Ehlers, M., J. Schiewe and M. Möller, 2002. Ultra High Resolution Remote Sensing for Urban Information Systems and 3D City Modeling. In: Anson, M., J.M. Ko and E,S.S. Lam (Eds.), Proceedings, International Conference on Advances in Building Technology, Vol II, Elsevier, Amsterdam, pp. 1619 – 1927.

Möller, M., M. Ehlers, M. Gähler, R. Janowsky und L. Tcherepanov, 2001. Entwicklung einer Methode zum automatisierten Biotopmonitoring auf der Grundlage von HRSC-A-Scannerdaten. Tagungsband "Naturschutz und Fernerkundung", BfN-Skripten 42, Bad Go-desberg, pp. 95-102.

Ehlers, M. und M. Möller, 2001. Analyse von Regionen mit hoher Nutztierdichte unter Verwendung eines GIS. RIS-Tagungsband, Cloppenburg, 47 pp.

Ehlers, M. and M. Möller, 2001. Veterinary Information System: A GIS Based Toolbox for Handling and Analyzing Epidemiological Risk Factors in Densely Populated Livestock Areas. European Association for Animal Production (EEAP) Conference, Budapest, 11 pp.

Ehlers, M., R. Janowsky and M. Gähler, 2001. Automated Analysis of Ultra High Resolution Remote Sensing Data: GIS to the Rescue? ISPRS Workshop "Challenges in Geospatial Analysis, Integration and Visualization, Athens, Georgia, USA, pp. 30-31.

Ehlers, M., 2000. Integrated Geographic Information Systems: From Data Integration to Integrated Analysis. Proceedings of the XIXth International Congress of ISPRS, Amsterdam, The Netherlands, IAPRS XXXIII/B2, pp. 172-178.

Zheng, D., W. Kainz and M. Ehlers, 2000. Neural Fuzzy Network-Supported Generation of Linguistic Knowledge for Understanding of Spatial Decision Making. Proceedings of the XIXth International Congress of ISPRS, Amsterdam, The Netherlands (CD Publication), 6 pp.

Ehlers, M., 2000. VGIS - Visionen und Stand der Technik. Protokoll des 3. Wissenschaftlichen Rundgespräch zum Thema "Geo-Informationssysteme", Deutsche Forschungsgemeinschaft, Bonn, 16 pp.

Möller, M. and M. Ehlers, 2000. Spatial Separation and Analysis of Densely and Sparsely Populated Livestock Areas Using GIS Technology. Proceedings of the 9th Symposium of the International Society for Veterinary Epidemiology and Economics (ISVEE) (CD Publication), 3 pp.

Ehlers, M., 1999. GIS und Visualisierung: Geo-Werkzeug und Kartenersatz? Kurzfassungen der Beiträge, Rundgespräch und Workshop "Die geowissenschaftliche Karte: Graphisches Meisterwerk oder Anachronismus?, Hannover, S. 3.

Ehlers, M., 1999. GIS Developments in Europe. Proceedings, GEOINFO 2000, Santiago de Chile (CD Publication), 24 pp.

Zheng, D., W. Kainz and M. Ehlers, 1999. Fuzzy Rule Acquisition and Assessment in Spatial Decision Exploration. Proceedings, 2nd International Workshop on Dynamic and Multi-Dimensional GIS (DMGIS'99), Beijing, pp. 51 - 58.

Jung, S., S.A. Voser and M. Ehlers, 1998. A Flowchart Interface for Hybrid Analyses in an Integrated GIS. Proceedings, ISPRS Commission II Symposium ”Data Integration: Systems and Techniques“, IAPRS XXXII-2, Cambridge, United Kingdom, pp. 131-135.

Jung, S., S.A. Voser and M. Ehlers, 1998. Hybrid Spatial Analysis as a Foundation for Integrated GIS. Proceedings, ISPRS Commission IV Symposium, pp. 276-280.

Ehlers, M., 1998. Komponenten des interdisziplinären Studienganges Umweltwissenschaften. Tagungsband "Systemwissenschaft in der Lehre", Beiträge des Instituts für Umweltsystem-forschung, Universität Osnabrück, 22 p.

Ehlers, M., 1997. GIS-unterstützte Entscheidungsfindung in der Umweltplanung. Tagungsband - 4. GIS-Tage in Schleswig-Holstein, Kiel, 20 p.

Ehlers, M., 1997. Workshop Foreword. Proceedings of the ISPRS II/2 Workshop "New De-velopments in Geographic Information Systems", p. iii.

Albrecht, J., S. Jung and M. Ehlers, 1997. Implementing Universal GIS Functionality under a Virtual GIS Interface. Proceedings of the ISPRS II/2 Workshop "New Developments in Geographic Information Systems", p. 109-121.

Ehlers, M., 1997. GIS-Einsatz im interdisziplinären Studiengang Umweltwissenschaften in Vechta. Eingeladener Beitrag, Abstracts, NIA-Fachtagung Geographische Informationssy-steme für Forschung, Lehre und Bildung im Natur- und Umweltschutz, Schneverdingen, 5 p.

Ehlers, M., 1997. European Geographical Database Research: Thoughts and Comments. European Science Foundation GISDATA Conference “Geographic Information Research at the Millennium”, Strassburg (Invited Contribution), 6 p.

Ehlers, M., 1997. GIS-Funktionalität für die Planung - Anspruch, Relatität, Trends, Tagungs-band ”Unterstützung des Planungsprozesses durch Geo-Informationssysteme bei der ökologisch orientierten Fließgewässerplanung”. Hannover, pp. 11-17.

Gahegan, M. and M. Ehlers, 1997. A Framework for Modeling of Uncertainty in an Integrated Geographic Information System. Proceedings, International Workshop on Dynamic and Multidimensional GIS, Hong Kong, pp. 64-79.

Czeranka, M. und M. Ehlers, 1996. GIS als Instrument zur Entscheidungsunterstützung. Tagungsband - 3. Flensburger GIS-Tage, FH Flensburg, 14 p.

Ehlers, M. and U. Rhein, 1996. The Role of Remote Sensing and GIS for an Operational State-Wide Environmental Monitoring. Proceedings of the XVIIIth International Congress of ISPRS, Vienna, Austria, IAPRS XXXI/B4, pp. 684-689. 

Albrecht, J., H. Brösamle and M. Ehlers, 1996. VGIS - a Graphical Front-End for User-Oriented Analytical GIS Operations. Proceedings of the XVIIIth International Congress of ISPRS, Vienna, Austria, IAPRS XXXI/B2, pp. 78-88.

Ehlers, M., 1996. Fernerkundung und GIS bei Umweltmonitoring und -management. Tagungsband ‘Einsatz von GIS und Fernerkundung in der Umweltanalyse’, Geo-Processing Reihe, Universität Zürich, Vol. 31, pp. 7-12.

Ehlers, M., 1995. Grundlagen von Geographischen Informationssystemen in der Umweltplanung. Proceedings, Workshop "Raumordnungsplanung - interdisziplinär", Sonthofen, 6 pp.

Ehlers, M., 1995. The Promise of Remote Sensing for Land Cover Monitoring and Modeling. Joint European Conference and Exhibition on Geographical Information, The Hague, The Netherlands, Vol. 2, pp. 426-432.

Ehlers, M., 1995. Advanced Technologies for Sustainable Development in Developing Countries: The Role of GIS and Remote Sensing. Proceedings, Geoinformatics'95 Hong Kong, Hong Kong, Vol. 2, pp. 949-962.

Ehlers, M., 1995. Availability of Core and Baseline Data for Global Mapping: GIS to the Rescue? Proceedings, Cambridge Conference for National Mapping Organisations, St. John's College, University of Cambridge, 13 p.

Ehlers, M. and W. Shi, 1995. Quality Indicators for Integrated GIS Datasets. Position Paper, European Science Foundation GISDATA Specialist Meeting on Data Quality, 18 p.

Ehlers, M., 1995. Anwendung von Satellitenfernerkundung für GIS. Tagungsband "GIS - Anwendungen und Trends", FH Flensburg, 8 p.

Ehlers, M. und U. Rhein, 1995. Environmental Monitoring - Statewide Comparative Landuse Classification in Lower Saxony Focusing on Moor and Pasture Areas. Proceedings, 9th In-ternational Symposium on Computer Science for Environmental Protection CSEP'95, Ber-lin, Vol. I, pp. 209-218.

Ehlers, M. 1995. Fernerkundung und Geographische Informationssysteme für Umweltmonitoring. Proceedings Geosystems User Group Meeting, Feldafing, pp. 5-11.

Ehlers, M., 1994. Remote Sensing and Geographic Information Systems: Advanced Technologies for Environmental Monitoring and Management. Abstracts, ASTM International Sym-posium on Remote Sensing and GIS for Site Characterization , p. 1.

Ehlers, M., 1994. Workshop Summary. Proceedings, ISPRS Workshop "Requirements for Integrated Geographic Information Systems", Environmental Research Institute of Michi-gan, Ann Arbor, MI, pp. iii-v.

Albrecht, J. and M. Ehlers, 1994. A Virtual GIS for the Interaction Modeling as a Basis for the Integrated Image Interpretation in Remote Sensing. Abstracts, International Workshop on Advanced Research in Geographic Information Systems, Ascona, Switzerland, p. 8.

Shi, W., M. Ehlers and K. Tempfli, 1994. Modelling and Visualizing Uncertainties in Multi-Data Based Spatial Analysis. Proceedings, 5th European Conference on Geographical In-formation Systems (EGIS/MARI'94), Paris, France, pp. 454-464.

Czeranka, M. and M. Ehlers, 1994. Designing a Post Graduate Program in Environmental Monitoring: The Role of GIS. Proceedings, 5th European Conference on Geographical In-formation Systems (EGIS/MARI'94), Paris, France, pp. 252-261.

Ehlers, M., D.R. Steiner and N. Faust, 1994. Integrated Geographic Information Systems (IGIS): Status and Research Issues. Proceedings, ISPRS Commission II Symposium "Sys-tems for Data Processing, Analysis and Representation", IAPRS XXX-2, Ottawa, Ontario, Canada, pp. 376-381.

Ehlers, M., J. Albrecht and H. Brösamle, 1994. Virtual Geographic Information Systems for Interaction Modeling as a Basis for an Integrative Image Analysis in Remote Sensing. Proceedings, ISPRS Commission IV Symposium "Mapping and Geographic Information Systems", IAPRS XXX-4, Athens, GA, pp. 618-624.

Ehlers, M., H. Brösamle and J. Albrecht, 1994. Modelling Image Interpretation in Remote Sensing Through a Virtual GIS Shell (VGIS). Proceedings, ISPRS Commission III Sym-posium "Spatial Information from Digital Photogrammetry and Computer Vision", IAPRS XXX-3/1, München, FRG, pp. 212-218.

Ehlers, M., 1994. Geometric Registration of Airborne Scanner Data Using Multiquadric Interpolation Techniques. Proceedings, First International Airborne Remote Sensing Conference, Strasbourg, France, Vol. II, pp. 494-502.

Ehlers, M., 1994. Geographische Informationssysteme: Grundlagen und Anwendungsbereiche. Tagungsunterlagen, "GIS - Einführung in Geographische Informationssysteme", Flensburg, 15 pp.

Ehlers, M., 1994. Geographische Informationssysteme als Werkzeug zum Umweltmonitoring. Tagungsunterlagen, "GIS - Einführung in Geographische Informationssysteme", Flensburg, 18 pp.

Shi, W. and M. Ehlers, 1994. Determining Uncertainties in Classified Remote Sensing Images-Based Dynamic Change Detection. Proceedings, The European Symposium on Re-mote Sensing "Image and Signal Processing for Remote Sensing", Rome, Italy, pp. 270-281.

Ehlers, M. and D.N. Fogel, 1994. High-Precision Geometric Correction of Airborne Remote Sensing Data Revisited: The Multiquadric Interpolation. Proceedings, The European Sym-posium on Remote Sensing "Image and Signal Processing for Remote Sensing", Rome, It-aly, pp. 814-824.

Ehlers, M., 1993. Developments in Remote Sensing: Techniques and Applications. Keynote Lecture, Proceedings, International Association of Pattern Recognition (IAPR) Technical Committee 7 (TC7) Workshop, Delft, Niederlande, pp. 55-64.

Ehlers, M., 1993. Conclusive Remarks to the Workshop. Proceedings, International Associa-tion of Pattern Recognition (IAPR) Technical Committee 7 (TC7) Workshop, Delft, Nieder-lande, pp. 243-244.

Shi, W. and M. Ehlers, 1993. "S-Band", a Model to Describe Uncertainty of an Object in an Integrated GIS/Remote Sensing Environment. Proceedings, International Geoscience and Remote Sensing Symposium (IGARSS'93), Tokyo, Japan, Vol. 4, pp. 1721-1723.

Ehlers, M., 1993. GIS Training and Education: Concepts and Status Quo. Proceedings, AF-RICAGIS'93, Tunis, Tunesien, pp. 179-189.

Millat, G., D. Steiner and M. Ehlers, 1994. Ecosystem Research in the North German Wat-tenmeer. Proceedings of the Second Thematic Conference on Remote Sensing for Marine and Coastal Environments, New Orleans, LA, Vol. I, pp. 116-125.

Ehlers, M., und M. Czeranka, 1992. GIS im Aufbau- und Zusatzstudiengang "Umweltmonitoring" in Vechta. Workshop 'Geo-Informationssysteme in der Ausbildung', Schriftenreihe des Institutes für Photogrammetrie der Universität Stuttgart, Heft 16, pp. 151-158.

Hough, R.R. and M. Ehlers, 1991. A Proposal to Extend our Understanding of the Global Economy. NASA Conference Publication 3099 "Multisource Data Integration in Remote Sensing", Greenbelt, Maryland, pp. 135-140.

Ehlers, M., D. Greenlee, T. Smith and J. Star, 1991. Data Structures and Access. Technical Paper 91-16, National Center for Geographic Information and Analysis, University of Cali-fornia, Santa Barbara, California, pp. 88-103.

Fuller, M.E. and M. Ehlers, 1991. An Automated System for Image Co-Registration Using Interest Clump Matching. Technical Papers, 1991 ACSM-ASPRS Annual Convention, Bal-timore, Maryland, Vol. 5, pp. 93-102.

Wu, C.H. and M. Ehlers, 1991. The Use of SPOT On-Board Data in Bundle Adjustments. Technical Papers, 1991 ACSM-ASPRS Annual Convention, Baltimore, Maryland, Vol. 5, pp. 407-411.

Ehlers, M. and S. Amer, 1991. Geoinformatics: An Integrated Approach for Acquisition. Processing and Production of Geo-Data. Proceedings, 2nd European Conference on Geo-graphical Information Systems (EGIS'91), Brussels, Belgium, pp. 306-312.

Ehlers, M. and M. Fuller, 1991. Region-Based Matching for Image Integration in Remote Sensing Databases. Proceedings, International Geoscience and Remote Sensing Symposium (IGARSS'91), Espoo, Finland, Vol. 4, pp. 2231-2234.

Edwards, G., Y. Bedard and M. Ehlers, 1990. Advanced Integration of Remote Sensing Image Analysis with Geographic Information Systems. Proceedings, GIS National Confe-rence, Ottawa, Canada, pp 1575-1585.

Haggerty, P.D., M. Ehlers and B.P. Pearce, 1990. A Multisensor Database of the Gulf of Maine. Technical Papers, 1990 ACSM-ASPRS Annual Convention, Denver, Colorado, Vol. 4, pp. 141-150.

Ehlers, M., 1990. Image Processing on the Macintosh II: The DIRIGO System - A Teaching Experience. Technical Papers, 1990 ACSM-ASPRS Annual Convention, Denver, Colorado, Vol. 4, pp. 113-120.

Steiner, D.R. and M. Ehlers, 1990. Establishment of a Digital Database for the Study of Glacial Velocity in Antarctica. Technical Papers, 1990 ACSM-ASPRS Annual Convention, Denver, Colorado, Vol. 4, pp. 369-377.

Ehlers, M., K. Beard, P. Haggerty and B. Pearce, 1990. Synergistic Integration of Remote Sensing, GIS/Database Technology and Numerical Modeling for Marine Geographic Information Systems. Proceedings, International Geoscience and Remote Sensing Symposium (IGARSS'90), College Park, Maryland, Vol. 1, pp. 949-952.

Steiner, D.R. and M. Ehlers, 1990. A Digital Database from Satellite Images for Glacial Studies in Antarctica. Proceedings, International Geoscience and Remote Sensing Symposium (IGARSS'90), College Park, Maryland, Vol. 2, pp. 1263-1266.

Haggerty, P.D., J. Jackson and M. Ehlers, 1990. The Dirigo System: Image Processing for the Macintosh II. Proceedings, 13th Canadian Symposium on Remote Sensing, Fredericton, New Brunswick, Canada, pp. 215-218.

Steiner, D.R. and M. Ehlers, 1990. The Use of Digital Satellite Images for the Determination of Glacial Velocities in Antarctica. Proceedings, 13th Canadian Symposium on Remote Sensing, Fredericton, New Brunswick, Canada, pp. 439-442.

Ehlers, M., 1990. Remote Sensing and Geographic Information Systems: Image-Integrated GIS. Abstracts, International Symposium on Mapping and Geographic Information Sys-tems, San Francisco, California, p. 8.

Ehlers, M., 1990. Low Cost Image Processing on Personal Computers: The Macintosh-II Based Dirigo System. Proceedings, ISPRS Commission II Symposium "Progress in Data Processing and Analysis", IAPRS XXVIII/2, Dresden, GDR, pp. 55- 62.

Fuller, M. and M. Ehlers, 1990. Automated System for Image Integration in Remote Sensing. Proceedings, ISPRS Commission VII Symposium "Global and Environmental Monitoring: Techniques and Impacts", IAPRS XXVIII/7-1, Victoria, British Columbia, Canada, pp. 445-449.

Ehlers, M., 1990. Integration of Remote Sensing Image Analysis and GIS: Status and Trends. Abstracts, International Seminar on Advances in Cartography, 10th National Indian Carto-graphic Association (INCA) Conference, Bombay, India, p. 37.

Ehlers, M., 1990. The Promise of Integrated Geographic Information Systems (IGIS). Proceedings, Symposium "40 Years of Geodesy in Indonesia", Bandung, Indonesia, 11 pp.

Bruegger, B. P., R. Barrera, A. U. Frank, K. Beard and M. Ehlers, 1989. Research Topics on Multiple Representation. Technical Paper-89-3, National Center for Geographic Informa-tion and Analysis. SUNY, Buffalo, New York, pp. 53-67.

Ehlers, M., 1989. The Potential of Multisensor Satellite Remote Sensing for Geographic Information Systems. Technical Papers, 1989 ASPRS-ACSM Annual Convention, Baltimore, Maryland, Vol. 4, pp. 40-45.

Jadkowski, M. A. and M. Ehlers, 1989. GIS Analysis of SPOT Image Data. Technical Papers, 1989 ASPRS-ACSM Annual Convention. Baltimore, Maryland, Vol. 4, pp. 65-74.

Ehlers, M., 1989. Remote Sensing and Geographic Information Systems: Towards Integrated Spatial Information Processing. Proceedings, International Geoscience and Remote Sensing Symposium (IGARSS'89). Vol. 1, pp. 63-66.

Ehlers, M. and P.D. Haggerty, 1989. Interfacing Remote Sensing and GIS Technologies for Urban and Regional Planning. Proceedings, URISA '89. Boston, Massachusetts, Vol. 4, pp. 85-92.

Ehlers, M., R.J. Hintz and R.H. Greene, 1989. High Resolution Airborne Video System for Mapping and GIS Applications. Proceedings, 12th Workshop on Color Aerial Photography and Videography in the Plant Sciences. Reno, Nevada, pp. 171-177.

Ehlers, M., K. Beard and M. Jadkowski, 1989. The Impact of High Resolution Satellite Data on Geographic Information Systems. Proceedings, International Geographic Information Systems (IGIS) Symposium '89, Baltimore, Maryland, pp. 231-239.

Beard, K., M. Ehlers and B. Pearce, 1989. Combining Marine Geographic Information Systems and Numerical Modelling for Effective Aquaculture Engineering and Environmental Management. Abstracts, Applied Aquaculture Workshop, Galway Ireland, Paper 1.

Ehlers, M. and R. Welch, 1988. Networking Multiple Computer Systems for Integrated Mapping Applications. Technical Papers, 1988 ACSM-ASPRS Annual Convention. St. Louis, Missouri, Vol. 6, p. 163.

Ehlers, M., 1988. Multisensor Image Fusion Techniques in Remote Sensing. Proceedings of the XVIth International Congress of ISPRS. Kyoto, Japan, IAPRS XXVII/B7, pp. 152-162.

Welch, R. and M. Ehlers, 1985. Digital Image Processing Techniques for Deriving Terrain Coordinates from Satellite Image Data. Technical Papers, 51st Annual Meeting ASP. Washington, D.C., p. 875.

Ehlers, M. and R. Welch, 1985. Satellite Remote Sensing Data as Input to Geographic Information Systems. Proceedings of the Eleventh International Symposium on Machine Processing of Remotely Sensed Data. Purdue University, West Lafayette, Indiana, p. 219.

Welch, R., T.R. Jordan and M. Ehlers, 1985. Comparative Evaluations of the Geodetic Accuracy and Cartographic Potential of Landsat-4/-5 Image Data. Technical Papers, 1985 ACSM-ASPRS Fall Convention. Indianapolis, Indiana, pp. 874-875.

Welch, R. and M. Ehlers, 1985. SIR-B Image Data for Cartographic Applications. Digest of the 1985 International Geoscience and Remote Sensing Symposium (IGARSS'85). Amherst, Massachusetts, Vol. 1, p. 378.

Ehlers, M., 1984. On the Probability of Generalized Correlation Functions. Proceedings of the XVth International Congress of ISPRS. Rio de Janeiro, Brazil, IAPRS XXV/A3a, pp. 139-150.
Kolouch, D. and M. Ehlers, 1984. Digital Enhancement of Interferometric Sonar Imagery for Fringe Pattern Recognition. Proceedings of the XVth International Congress of ISPRS. Rio de Janeiro, Brazil, IAPRS XXV/A3a, pp. 542-552.

Michaelis, M., E. Dennert-Möller and M. Ehlers, 1984. Correction of the Light-Fall-Off in Photographs by Means of Digital Statistical Methods. Proceedings of the XVth Interna-tional Congress of ISPRS. Rio de Janeiro, Brazil, IAPRS XXV/A3b, pp. 698-707.

Ehlers, M., 1984. The Automatic DISCOR System for Rectification of Space-Borne Imagery as a Basis for Map Production. Proceedings of the XVth International Congress of ISPRS. Rio de Janeiro. Brazil, IAPRS XXV/A4, pp. 135-147.

Ehlers, M., E. Dennert-Möller, D. Kolouch and P. Lohmann, 1984. Non-Recursive Filter Techniques in Digital Processing of Remote Sensing Data. Proceedings of the XVth Interna-tional Congress of ISPRS. Rio de Janeiro, Brazil, IAPRS XXV/A7, pp. 163-175.

Konecny, G., E. Dennert-Möller, M. Ehlers, D. Kolouch and P. Lohmann, 1984. Methods and Possibilities of Remote Sensing in Coastal Areas. Proceedings of the XVth International Congress of ISPRS. Rio de Janeiro, Brazil, IAPRS XXV/A7, pp. 281-284.

Luhmann, T. and M. Ehlers, 1984. AIMS: A System for Automatic Image Matching. Proceedings of the Eighteenth International Symposium on Remote Sensing of Environment. Paris, France, pp. 971-979.

Ehlers, M., 1983. Digital Filtering of Noisy Thermal Scanner Data with the Scanner-Regression-Method. Proceedings of the Eighth Canadian Symposium on Remote Sensing, Montreal, Canada, pp. 119-125.

Ehlers, M., 1983. Fast Twodimensional Filtering of Thermal Scanner Data with Onedimen-sional Estimation. Proceedings of the Seventeenth International Symposium on Remote Sensing of Environment. Ann Arbor, Michigan, pp. 635-643.

Ehlers, M., 1983. Two-Dimensional Filtering with One-Dimensional Approach: The Scanner-Regression-Filter (SRF). Proceedings of the Third Scandinavian Conference on Image Analysis. Copenhagen, Denmark, pp. 173-181.

Ehlers, M., 1982. Digital Image Processing of Remote Sensing Imagery: A Comparative Study on Different Objective Functions in Correlation Process. Proceedings of the Interna-tional Society for Photogrammetry and Remote Sensing (ISPRS) Symposium, Commission VII. Toulouse, France, IAPRS XXIV-VII/1, pp. 71-77.

Ehlers, M. and P. Lohmann, 1982. Digital Enhancement of Noisy Scanner Imagery. Proceedings of the ISPRS Commission VII Symposium. Toulouse, France, IAPRS XXIV-VII/1, pp. 135-143.

Ehlers, M. and E. Dennert-Möller, 1981. Digital Correlation and Classification of Multitemporal Remote Sensing Images from Tidal Lands. Proceedings of the Second Scandinavian Conference on Image Analysis. Helsinki, Finland, pp. 456-462.

Ehlers, M., 1980. Filter Techniques and Their Application in Digital Correlation. Proceedings of the XIVth International Society of Photogrammetry (ISP) Congress. Hamburg, FRG, International Archives of Photogrammetry and Remote Sensing (IAPRS) XXIII/B3, pp. 193-201.

Ehlers, M. and B. Wrobel, 1980. Digital Correlation of Remote Sensing Imagery from Tidal Lands. Proceedings of the XIVth ISP Congress. Hamburg, FRG, IAPRS XXIII/B3, pp. 202-213.

Ehlers, M. und P. Haberäcker, 1978. Farbstoffvermischungsexperimente im Testgebiet Kieler Bucht. Vergleichende Auswertung von Multispektralscanner- und Farbdiadaten. Berichte zum Symposium Flugzeugmeßprogramm. Hannover, FRG, BMFT-Forschungsbericht W78-04, pp. 139-142.