Krantz, Anders, 2009. Mapping of clear-cuts in Swedish forest using satellite images acquired by the radar sensor ALOS PALSAR. Second cycle, A1E. Umeå: SLU, Dept. of Forest Resource Management
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Abstract
This study presents results for observing forest changes in Sweden using multi-temporal L-band satellite data and is a part of the JAXA’s ALOS Kyoto and Carbon Initiative. An extensive dataset of images acquired by the Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) is investigated for clear-cut detection in boreal forests in northern Sweden (Lat. 64°14’ N, Long. 19°50’ E). Strong forest/non-forest contrast and temporal consistency were found for the Fine Beam Dual HV-polarized backscatter during unfrozen conditions. Thus, a simple thresholding algorithm that exploits the temporal consistency of pair-wise HV-backscatter measurements has been developed for detection of clear-felled areas. When applied to an image pair acquired during favorable weather conditions, the detection algorithm identified 76% of the clear-cut pixels within a reference layer, with zero erroneously detected pixels. With further refinement, the developed methodology can be an option to present operational alternatives for clear-cut detection.
Main title: | Mapping of clear-cuts in Swedish forest using satellite images acquired by the radar sensor ALOS PALSAR |
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Authors: | Krantz, Anders |
Supervisor: | Fransson, Johan |
Examiner: | Olsson, Håkan |
Series: | Arbetsrapport / Sveriges lantbruksuniversitet, Institutionen för skoglig resurshushållning och geomatik |
Volume/Sequential designation: | 265 |
Year of Publication: | 2009 |
Level and depth descriptor: | Second cycle, A1E |
Student's programme affiliation: | SY001 Forest Science - Master's Programme 300 HEC |
Supervising department: | (S) > Dept. of Forest Resource Management |
Keywords: | Remote Sensing, Forest monitoring, Algorithm, change detection, JAXA |
URN:NBN: | urn:nbn:se:slu:epsilon-2-141 |
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-2-141 |
Subject. Use of subject categories until 2023-04-30.: | Surveying methods |
Language: | English |
Deposited On: | 23 Dec 2009 08:29 |
Metadata Last Modified: | 20 Apr 2012 14:10 |
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