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Detection of forest changes using ALOS PALSAR satellite images

J.E.S. Fransson ; M. Magnusson ; H. Olsson ; Leif E.B. Eriksson (Institutionen för radio- och rymdvetenskap, Radarfjärranalys) ; Gustaf Sandberg (Institutionen för radio- och rymdvetenskap, Radarfjärranalys) ; Gary Smith-Jonforsen (Institutionen för radio- och rymdvetenskap, Radarfjärranalys) ; Lars M. H. Ulander (Institutionen för radio- och rymdvetenskap, Radarfjärranalys)
IEEE Geoscience and Remote Sensing Symposium (IGARSS 2007), Barcelona, Spain, July 23-27, 2007 Vol. DOI: 10.1109/IGARSS.2007.4423308 (2007), p. 2330-2333.
[Konferensbidrag, övrigt]

A controlled experiment has been performed to quantify the ability to detect clear-cuts using ALOS PALSAR data. The experiment consisted of 8 old spruce dominated stands with a size of about 1.5 ha, located at a test site in southern Sweden. Four of the stands were clear-felled and the remaining stands were left untreated for reference. A time series of PALSAR images were acquired prior to, during, and after treatment, including 7 Fine Beam Single polarization (FBS, look angle 34.3°, HH-polarization) SAR images. The results clearly show that the clear-felled stands could be separated from the reference stands. The drop in backscattering coefficient between the reference and the clear-felled stands was on average 2.1 dB. This implies that ALOS PALSAR data potentially can be used for large-scale mapping of changes in forest cover.

Nyckelord: forest, change detection, SAR, ALOS, clear-cut, wind-throw



Denna post skapades 2008-01-09. Senast ändrad 2016-05-24.
CPL Pubid: 65295

 

Institutioner (Chalmers)

Institutionen för radio- och rymdvetenskap, Radarfjärranalys (2005-2010)

Ämnesområden

Skogsteknik
Skogsuppskattning och skogsindelning

Chalmers infrastruktur