{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,7]],"date-time":"2026-03-07T12:01:17Z","timestamp":1772884877333,"version":"3.50.1"},"reference-count":43,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2018,1,26]],"date-time":"2018-01-26T00:00:00Z","timestamp":1516924800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Recently, ground-based hyperspectral imaging has come to the fore, supporting the arduous task of mapping near-vertical, difficult-to-access geological outcrops. The application of outcrop sensing within a range of one to several hundred metres, including geometric corrections and integration with accurate terrestrial laser scanning models, is already developing rapidly. However, there are few studies dealing with ground-based imaging of distant targets (i.e., in the range of several kilometres) such as mountain ridges, cliffs, and pit walls. In particular, the extreme influence of atmospheric effects and topography-induced illumination differences have remained an unmet challenge on the spectral data. These effects cannot be corrected by means of common correction tools for nadir satellite or airborne data. Thus, this article presents an adapted workflow to overcome the challenges of long-range outcrop sensing, including straightforward atmospheric and topographic corrections. Using two datasets with different characteristics, we demonstrate the application of the workflow and highlight the importance of the presented corrections for a reliable geological interpretation. The achieved spectral mapping products are integrated with 3D photogrammetric data to create large-scale now-called \u201chyperclouds\u201d, i.e., geometrically correct representations of the hyperspectral datacube. The presented workflow opens up a new range of application possibilities of hyperspectral imagery by significantly enlarging the scale of ground-based measurements.<\/jats:p>","DOI":"10.3390\/rs10020176","type":"journal-article","created":{"date-parts":[[2018,1,26]],"date-time":"2018-01-26T11:29:02Z","timestamp":1516966142000},"page":"176","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":62,"title":["Radiometric Correction and 3D Integration of Long-Range Ground-Based Hyperspectral Imagery for Mineral Exploration of Vertical Outcrops"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8464-2331","authenticated-orcid":false,"given":"Sandra","family":"Lorenz","sequence":"first","affiliation":[{"name":"Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Division \u201cExploration Technology\u201d, Chemnitzer Stra\u00dfe 40, 09599 Freiberg, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8999-603X","authenticated-orcid":false,"given":"Sara","family":"Salehi","sequence":"additional","affiliation":[{"name":"Department of Petrology and Economic Geology, Geological Survey of Denmark and Greenland, 1350 Copenhagen K, Denmark"},{"name":"Department of Geosciences and Natural Resource Management, University of Copenhagen, 1165 Copenhagen K, Denmark"}]},{"given":"Moritz","family":"Kirsch","sequence":"additional","affiliation":[{"name":"Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Division \u201cExploration Technology\u201d, Chemnitzer Stra\u00dfe 40, 09599 Freiberg, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6200-2704","authenticated-orcid":false,"given":"Robert","family":"Zimmermann","sequence":"additional","affiliation":[{"name":"Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Division \u201cExploration Technology\u201d, Chemnitzer Stra\u00dfe 40, 09599 Freiberg, Germany"}]},{"given":"Gabriel","family":"Unger","sequence":"additional","affiliation":[{"name":"Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Division \u201cExploration Technology\u201d, Chemnitzer Stra\u00dfe 40, 09599 Freiberg, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1827-2894","authenticated-orcid":false,"given":"Erik","family":"Vest S\u00f8rensen","sequence":"additional","affiliation":[{"name":"Department of Petrology and Economic Geology, Geological Survey of Denmark and Greenland, 1350 Copenhagen K, Denmark"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4383-473X","authenticated-orcid":false,"given":"Richard","family":"Gloaguen","sequence":"additional","affiliation":[{"name":"Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Division \u201cExploration Technology\u201d, Chemnitzer Stra\u00dfe 40, 09599 Freiberg, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2018,1,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1401","DOI":"10.1109\/TGRS.2003.812906","article-title":"Comparative alteration mineral mapping using visible to shortwave infrared (0.4\u20132.4 mm) Hyperion, ALI, and ASTER imagery","volume":"41","author":"Hubbard","year":"2003","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_2","first-page":"149","article-title":"Mineral mapping with AVIRIS and EO-1 Hyperion","volume":"Volume 41","author":"Kruse","year":"2003","journal-title":"Proceedings of the 12th JPL Airborne Geoscience Workshop"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1208","DOI":"10.1016\/j.rse.2009.02.007","article-title":"Mapping lithology of the Sarfartoq carbonatite complex, southern West Greenland, using HyMap imaging spectrometer data","volume":"113","author":"Bedini","year":"2009","journal-title":"Remote Sens. Environ."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"917","DOI":"10.1080\/08120099.2011.571287","article-title":"Hydrothermal mineral alteration patterns in the Mount Isa Inlier revealed by airborne hyperspectral data","volume":"58","author":"Laukamp","year":"2011","journal-title":"Aust. J. Earth Sci."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Zimmermann, R., Brandmeier, M., Andreani, L., Mhopjeni, K., and Gloaguen, R. (2016). Remote Sensing Exploration of Nb-Ta-LREE-Enriched Carbonatite (Epembe\/Namibia). Remote Sens., 8.","DOI":"10.3390\/rs8080620"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Jakob, S., Gloaguen, R., and Laukamp, C. (2016). Remote Sensing-Based Exploration of Structurally-Related Mineralizations around Mount Isa, Queensland, Australia. Remote Sens., 8.","DOI":"10.3390\/rs8050358"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Jakob, S., Zimmermann, R., and Gloaguen, R. (2017). The Need for Accurate Geometric and Radiometric Corrections of Drone-Borne Hyperspectral Data for Mineral Exploration: MEPHySTo\u2014A Toolbox for Pre-Processing Drone-Borne Hyperspectral Data. Remote Sens., 9.","DOI":"10.3390\/rs9010088"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1016\/0034-4257(93)90014-O","article-title":"Derivation of scaled surface reflectances from AVIRIS data","volume":"44","author":"Gao","year":"1993","journal-title":"Remote Sens. Environ."},{"key":"ref_9","first-page":"21","article-title":"Atmospheric correction for shortwave spectral imagery based on MODTRAN4","volume":"Volume 99\u201317","author":"Matthew","year":"1999","journal-title":"Summaries of the Eighth JPL Airborne Earth Science Workshop"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2631","DOI":"10.1080\/01431160110115834","article-title":"Geo-atmospheric processing of airborne imaging spectrometry data, Part 2: Atmospheric\/topographic correction","volume":"23","author":"Richter","year":"2002","journal-title":"Int. J. Remote Sens."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"2653","DOI":"10.1080\/014311699211994","article-title":"The use of the empirical line method to calibrate remotely sensed data to reflectance","volume":"20","author":"Smith","year":"1999","journal-title":"Int. J. Remote Sens."},{"key":"ref_12","first-page":"21","article-title":"Comparison of various techniques for calibration of AIS data","volume":"Volume 86\u201335","author":"Roberts","year":"1986","journal-title":"Proceedings of the 2nd Airborne Imaging Spectrometer Data Analysis Workshop"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"459","DOI":"10.1016\/0034-4257(88)90019-3","article-title":"An improved dark-object subtraction technique for atmospheric scattering correction of multispectral data","volume":"24","author":"Chavez","year":"1988","journal-title":"Remote Sens. Environ."},{"key":"ref_14","unstructured":"Clark, R.N., Swayze, G.A., Livo, K.E., Kokaly, R.F., King, T.V.V., Dalton, J.B., Vance, J.S., Rockwell, B.W., Hoefen, T., and McDougal, R.R. (2002). Surface Reflectance Calibration of Terrestrial Imaging Spectroscopy Data: A Tutorial Using AVIRIS, Proceedings of the 10th Airborne Earth Science Workshop."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2529","DOI":"10.3390\/rs3112529","article-title":"Multispectral remote sensing from unmanned aircraft: Image processing workflows and applications for rangeland environments","volume":"3","author":"Laliberte","year":"2011","journal-title":"Remote Sens."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1798","DOI":"10.1080\/01431161.2012.727039","article-title":"Close-range hyperspectral imaging for geological field studies: Workflow and methods","volume":"34","author":"Kurz","year":"2013","journal-title":"Int. J. Remote Sens."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"865","DOI":"10.5194\/isprs-archives-XLI-B5-865-2016","article-title":"A review of hyperspectral imaging in close range applications","volume":"41","author":"Kurz","year":"2016","journal-title":"Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"511","DOI":"10.5721\/EuJRS20154829","article-title":"Mapping clay minerals in an open-pit mine using hyperspectral and LiDAR data","volume":"48","author":"Murphy","year":"2015","journal-title":"Eur. J. Remote Sens."},{"key":"ref_19","unstructured":"Rosa, D., Dewolfe, M., Guarnieri, P., Kolb, J., Laflamme, C., Partin, C.A., Salehi, S., S\u00f8rensen, E.V., Thaarup, S., and Thrane, K. (2017). Architecture and Mineral Potential of the Paleoproterozoic Karrat Group, West Greenland: Results of the 2016 Season, Geological Survey of Denmark and Greenland. GEUS Rapport 2017\/5."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Salehi, S., Lorenz, S., S\u00f8rensen, E.V., Zimmermann, R., Fensholt, R., Heincke, B.H., Kirsch, M., and Gloaguen, R. (2008). Integration of Vessel-Based Hyperspectral Scanning and 3D-Photogrammetry for Mobile Mapping of Steep Coastal Cliffs in the Arctic. Remote Sens., 10.","DOI":"10.3390\/rs10020175"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"493","DOI":"10.1016\/j.oregeorev.2016.03.006","article-title":"M Metallogeny of Greenland","volume":"78","author":"Kolb","year":"2016","journal-title":"Ore Geol. Rev."},{"key":"ref_22","unstructured":"S\u00f8rensen, L.L., Stensgaard, B.M., Thrane, K., Rosa, D., and Kalvig, P. (2013). Sediment-Hosted Zinc Potential in Greenland, Geological Survey of Denmark and Greenland. GEUS Rapport 2013\/56."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"453","DOI":"10.1144\/jgs2016-109","article-title":"Basin evolution and destruction in an Early Proterozoic continental margin: The Rinkian fold\u2013thrust belt of central West Greenland","volume":"174","author":"Grocott","year":"2017","journal-title":"J. Geol. Soc."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1022","DOI":"10.2113\/gsecongeo.75.7.1022","article-title":"Remobilization of the massive sulfide ore of the Black Angel Mine, central West Greenland","volume":"75","author":"Pedersen","year":"1980","journal-title":"Econ. Geol."},{"key":"ref_25","unstructured":"Henderson, G., and Pulvertaft, T.C.R. (1987). Geological Map of Greenland, 1:100 000. M\u00e2rmorilik 71 V.2 Syd, N\u00fbg\u00e2tsiaq 71 V.2 Nord, Pangnert\u00f4q 72 V.2 Syd. Lithostratigraphy and Structure of a Lower Proterozoic Dome and Nappe Complex, Geological Survey of Greenland."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Guarnieri, P., Partin, C., and Rosa, D. (2016). Palaeovalleys at the Basal Unconformity of the Palaeoproterozoic Karrat Group, West Greenland, Geological Survey of Denmark and Greenland. Geological Survey of Denmark and Greenland Bulletin.","DOI":"10.34194\/geusb.v35.4940"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Rosa, D., Guarnieri, P., Hollis, J., Kolb, J., Partin, C.A., Petersen, J., S\u00f8rensen, E.V., Thomassen, B., Thomsen, L., and Thrane, K. (2016). Architecture and Mineral Potential of the Paleoproterozoic Karrat Group, West Greenland: Results of the 2015 Season, Geological Survey of Denmark and Greenland.","DOI":"10.34194\/geusb.v35.4940"},{"key":"ref_28","unstructured":"S\u00e1ez, R., and Donaire, T. (2008). Corta atalaya. Geolog\u00eda de Huelva: Lugares de Inter\u00e9s Geol\u00f3gico, Universidad de Huelva, Facultad de Ciencias Experimentales."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"882","DOI":"10.1007\/s00531-002-0269-8","article-title":"Variscan tectonics in the Iberian Pyrite Belt, South Portuguese Zone","volume":"91","author":"Soriano","year":"2002","journal-title":"Int. J. Earth Sci."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1109\/36.3001","article-title":"A transformation for ordering multispectral data in terms of image quality with implications for noise removal","volume":"26","author":"Green","year":"1988","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"3168","DOI":"10.1109\/TGRS.2009.2020156","article-title":"An Adaptive Noise-Filtering Algorithm for AVIRIS Data with Implications for Classification Accuracy","volume":"47","author":"Phillips","year":"2009","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"300","DOI":"10.1016\/j.geomorph.2012.08.021","article-title":"\u2018Structure-from-Motion\u2019 photogrammetry: A low-cost, effective tool for geoscience applications","volume":"179","author":"Westoby","year":"2012","journal-title":"Geomorphology"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"359","DOI":"10.5194\/esurf-4-359-2016","article-title":"Image-based surface reconstruction in geomorphometry\u2014Merits, limits and developments","volume":"4","author":"Eltner","year":"2016","journal-title":"Earth Surf. Dyn."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Carrivick, J.L., Smith, M.W., and Quincey, D.J. (2016). Structure from Motion in the Geosciences, John Wiley & Sons, Ltd.","DOI":"10.1002\/9781118895818"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1016\/j.geomorph.2016.11.021","article-title":"Optimising UAV topographic surveys processed with structure-from-motion: Ground control quality, quantity and bundle adjustment","volume":"280","author":"James","year":"2017","journal-title":"Geomorphology"},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Lowe, D.G. (1999, January 20\u201327). Object recognition from local scale-invariant features. Proceedings of the International Conference on Computer Vision, Kerkyra, Greece.","DOI":"10.1109\/ICCV.1999.790410"},{"key":"ref_37","unstructured":"Muja, M., and Lowe, D. (2009, January 5\u20138). Fast approximate nearest neighbors with automatic algorithm configuration. Proceedings of the Fourth International Conference on Computer Vision Theory and Applications, Lisboa, Portugal."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1080\/07038992.1982.10855028","article-title":"On the Slope-Aspect Correction of Multispectral Scanner Data","volume":"8","author":"Teillet","year":"1982","journal-title":"Can. J. Remote Sens."},{"key":"ref_39","unstructured":"Bakker, W.H., van Ruitenbeek, F.J.A., and van der Werff, H.M.A. (2011, January 11\u201313). Hyperspectral image mapping by automatic color coding of absorption features. Proceedings of the 7th EARSEL Workshop of the Special Interest Group in Imaging Spectroscopy, Edinburgh, UK."},{"key":"ref_40","first-page":"237","article-title":"Wavelength feature mapping as a proxy to mineral chemistry for investigating geologic systems: An example from the Rodalquilar epithermal system","volume":"64","author":"Bakker","year":"2018","journal-title":"Int. J. Appl. Earth Obs. Geoinf."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"270","DOI":"10.1130\/0091-7613(1985)13<270:RSITVA>2.0.CO;2","article-title":"Reflectance spectroscopy in the visible and near-infrared (0.35\u20132.55 \u00b5m): Applications in carbonate petrology","volume":"13","author":"Gaffey","year":"1985","journal-title":"Geology"},{"key":"ref_42","first-page":"187","article-title":"Classification of Limestones and Dolomites on Basis of Ca\/Mg Ratio","volume":"27","author":"Chilingar","year":"1957","journal-title":"SEPM J. Sediment. Res."},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Garde, A.A. (1978). The Lower Proterozoic Marmorilik Formation, East of M\u00e2rmorilik, West Greenland, Nyt Nordisk Forlag Arnold Busck.","DOI":"10.7146\/mog.v200.147463"}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/2\/176\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T14:52:42Z","timestamp":1760194362000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/2\/176"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,1,26]]},"references-count":43,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2018,2]]}},"alternative-id":["rs10020176"],"URL":"https:\/\/doi.org\/10.3390\/rs10020176","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,1,26]]}}}