This section contains a list of OPALS related references. In case you are using OPALS in a scientific environment, please cite the appropriate reference listed below in your publication.

OPALS software concept

N. Pfeifer, G. Mandlburger, J. Otepka, W. Karel: OPALS - A framework for Airborne Laser Scanning data analysis. Computers, Environment and Urban Systems, 45 (2014), 125 - 136.
G. Mandlburger, J. Otepka, W. Karel, W. Wagner, N. Pfeifer: Orientation And Processing Of Airborne Laser Scanning Data (OPALS) - Concept And First Results Of A Comprehensive Als Software. in: IAPRS, Vol. XXXVIII, Part 3/W8 (2009), ISSN: 1682-1750; 55 - 60.
J. Otepka, G. Mandlburger, W. Karel: The OPALS Data Manager - Efficient Data Management for Processing Large Airborne Laser Scanning Projects; in: ISPRS Annals, Comm. III, Volume 1-3 (2012), ISSN: 2194-9042; 153 - 159.

OPALS related papers

Briese, C., 2004. Three-dimensional modelling of breaklines from airborne laser scanner data. In: IAPRS, Vol.XXXV, B3, Istanbul, Turky.
Doneus, M. and Briese, C., 2006. Digital terrain modelling for archaeological interpretation within forested areas using fullwaveform laserscanning. In: The 7th International Symposium on Virtual Reality, Archaeology and Cultural Heritage VAST, Cyprus.
M. Doneus, N. Doneus, C. Briese, M. Pregesbauer, G. Mandlburger, G. Verhoeven: Airborne laser bathymetry - detecting and recording submerged archaeological sites from the air. Journal of Archaeological Science, 40 (2013), 4; 2136 - 2151.
Dorninger, P. and Pfeifer, N., 2008. A comprehensive automated 3d approach for building extraction, reconstruction, and regularization from airborne laser scanning point clouds. Sensors 8(11), pp. 7323-7343.
Eysn, L.; Hollaus, M.; Schadauer, K.; Pfeifer, N. Forest Delineation Based on Airborne LIDAR Data. Remote Sens. 2012, 4, 762-783.
Eysn L., Pfeifer, N., Ressl, C., Hollaus, M., Grafl, A., and Morsdorf F., 2013. A Practical Approach for Extracting Tree Models in Forest Environments Based on Equirectangular Projections of Terrestrial Laser Scans. Remote Sensing, 5, 11; 5424 - 5448.
Hollaus, M., Wagner, W., Maier, B. and Schadauer, K., 2007. Airborne laser scanning of forest stem volume in a mountainous environment. Sensors 7(8), pp. 1559-1577.
Hollaus, M., Mandlburger, G., Pfeifer, N., Mücke, W., 2010. Land cover dependent derivation of digital surface models from airborne laser scanning data. PCV 2010, Paris; in: "IAPRS Volume XXXVIII Part 3A", ISSN: 1682-1750; 221
Kager, H., 2004. Discrepancies between overlapping laser scanning strips - simultaneous fitting of aerial laser scanner strips. In: IAPRS, XXXV, B/1, Istanbul, Turkey, pp. 555-560.
Kraus, K. and Pfeifer, N., 1998. Determination of terrain models in wooded areas with airborne laser scanner data. ISPRS Journal of Photogrammetry and Remote Sensing 53, pp. 193-203.
Kraus, K. and Pfeifer, N., 2001. Advanced DTM generation from LIDAR data. In: IAPRS, XXXIV, 3/W4, Annapolis, MD, USA, pp. 23-30.
Mandlburger, G., Briese, C. and Pfeifer, N., 2007. Progress in LiDAR sensor technology - chance and challenge for DTM generation and data administration. In: Proceedings of the 51th Photogrammetric Week, D. Fritsch (ed.), Herbert Wichmann Verlag, Heidelberg, Germany, pp. 159-169.
Mandlburger, G., Hauer, C., Höfle, B., Habersack, H. and Pfeifer, N., 2008. Optimisation of lidar derived terrain models for river flow modelling. Hydrology and Earth System Sciences Discussions 5(6), pp. 3605-3638.
G. Mandlburger, J. Otepka, W. Karel, M. Hollaus, C. Ressl, A. Haring, C. Briese, G. Molnár, B. Höfle: OPALS - a comprehensive laser scanning software for geomorphological analysis. in: "Geophysical Research Abstracts", 13 (2011), Paper ID EGU2011-7933
Mandlburger, G., Pfennigbauer, M., & Pfeifer, N. (2013). Analyzing near water surface penetration in laser bathymetry – A case study at the River Pielach. ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences, II-5/W2, 175-180.
Mandlburger, G., Hauer, C., Wieser, M., Pfeifer, N. (2015). Topo-Bathymetric LiDAR for Monitoring River Morphodynamics and Instream Habitats – A Case Study at the Pielach River. Remote Sens. 2015, 7, 6160-6195.
Otepka, J., Briese, C. and Nothegger, C., 2006. First steps to a topographic information system of the next generation. In: Symposium of ISPRS Commission IV - Geo Spatial Databases for Sustainable Development, Goa, India.
J. Otepka, G. Mandlburger, W. Karel, B. Wöhrer: Verteilte Prozessierung von ALS-Daten mittels Cloud-Computing - Erste Ergebnisse einer Pilotstudie. in: "16. Internationale geodätische Woche Obergurgl 2011", Herbert Wichmann, 2011.
J. Otepka, S. Ghuffar, C. Waldhauser, R. Hochreiter, N. Pfeifer: Georeferenced Point Clouds: A Survey of Features and Point Cloud Management. ISPRS International Journal of Geo-Information, 2 (2013), 4; 1038 - 1065.
Pfeifer, N., Stadler, P. and Briese, C., 2001. Derivation of digital terrain models in the SCOP++ environment. In: Proceedings of OEEPE Workshop on Airborne Laserscanning and Interferometric SAR for Detailed Digital Terrain Models, Stockholm, Sweden.
Ressl, C., Kager, H. and Mandlburger, G., 2008. Quality checking of als projects using statistics of strip differences. In: IAPRS, XXXVII, pp. 253-260.
Rottensteiner, F. and Briese, C., 2002. A new method for building extraction in urban areas from high-resolution LIDAR data. In: IAPRS, XXXIV, 3A, Graz, Austria, pp. 295-301.
Szekely, B., Hollaus, M., Zamolyi, A., Draganits, E., Roncat, A. and Pfeifer, N., 2008. Some geoscientific applications of airborne laser scanning dtms in austria. Journal of Alpine Geology 49, pp. 109-110.
Wagner, W., Ullrich, A., Ducic, V., Melzer, T. and Studnicka, N., 2006. Gaussian decomposition and calibration of a novel smallfootprint full-waveform digitising airborne laser scanner. ISPRS Journal of Photogrammetry and Remote Sensing 60(2), pp. 100-112.
W. Wagner, A. Ullrich, T. Melzer, C. Briese, K. Kraus: From Single-pulse to Full-waveform Airborne Laser Scanners: Potential and Practical Challenges. in: "Proceedings of the XXth Congress, Istanbul", Vol XXXV, Part B/3 (2004), ISSN: 1682-1750; 201 - 206
A. Zlinszky, A. Schroiff, J. Otepka, G. Mandlburger, N. Pfeifer: Simultaneous colour visualizations of multiple ALS point cloud attributes for land cover and vegetation analysis. in: Geophysical Research Abstracts, 16 (2014), 6680.