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Forest Community Mapping Using Hyperspectral (CHRIS/PROBA) and Sentinel-2 Multispectral Images
Corresponding Author(s) : Ewa Glowienka
Geomatics and Environmental Engineering,
Vol. 16 No. 4 (2022): Geomatics and Environmental Engineering
Abstract
The possibility to use hyperspectral images (CHRIS/PROBA) and multispectral images (Sentinel-2) in the classification of forest communities is assessed in this article. The pre-processing of CHRIS/PROBA image included: noise reduction, radiometric correction, atmospheric correction, geometric correction. Due to MNF transformation the number of the hyperspectral image channels was reduced (to 10 channels) and smiling errors were removed. Sentinel-2 image (level 2A) did not require pre-processing. Three tree genera occurring in the study area were selected for the classification: pine (Pinus), alder (Alnus) and birch (Betula). Image classification was carried out with three methods: SAM (Spectral Angle Mapper ), MTMF (Mixture Tuned Matched Filtering), SVM (Support Vector Machine). For the CHRIS/PROBA image, the algorithm SVM turned out to be the best. Its overall accuracy (OA) was 72%. The poorest result (OA = 52%) was for the MTMF classifier. In the classification of Sentinel-2 multispectral image the best result was for the MTMF method: OA = 82%, kappa coefficient 0.7. For other methods, the overall accuracy exceeded 65%. Among the classified genera, the highest producer’s accuracy was obtained for pine (PA = 96%), and the broad-leaf genera: alder and birch had PA ranging from 42% to 85%.
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References
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L3HARRIS. https://www.l3harrisgeospatial.com/docs [access: 11.04.2021].
Green A., Berman M., Switzer P., Craig M.: A transformation for ordering multispectral data in terms of image quality with implications for noise removal. IEEE Transactions on Geoscience and Remote Sensing, vol. 26, no. 1, 1988, pp. 65–74. https://doi.org/10.1109/36.3001.
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Janssen F., van der Wel F.: Accuracy assessment of satellite derived land cover data: A review. Photogrammetric Engineering and Remote Sensing, vol. 60, 1994, pp. 419–426.
Phiri D., Simwanda M., Salekin S., Nyirenda V.R., Murayama Y., Ranagalage M.: Sentinel-2 Data for Land Cover/Use Mapping: A Review. Remote Sensing, vol. 12, no. 14, 2020, 2291. https://doi.org/10.3390/rs12142291.
Gupta N., Milton E.J.: Quality Assessment of CHRIS/PROBA Image and Recommendation for Land Cover Classification. [in:] Proceedings of the Remote Sensing and Photogrammetry Society Annual Conference 2009, pp. 118–126.
Encyklopedia drzew. http://encyklopediadrzew.pl [access: 30.07.2021].
Leckie D., Tinis S., Nelson T., Burnett C., Gougeon F., Cloney E., Paradine D.: Issues in species classification of trees in old growth conifer stands. Canadian Journal of Remote Sensing, vol. 31, 2005, pp. 175–190. https://doi.org/10.5589/m05-004.