%0 Journal Article
%T Detection of Forest Clear-Cuts with Shuttle Radar Topography Mission (SRTM) and Tandem-X InSAR Data
%A Svein Solberg
%A Rasmus Astrup
%A Dan J. Weydahl
%J Remote Sensing
%D 2013
%I MDPI AG
%R 10.3390/rs5115449
%X The aim of this study was to determine whether forest clear-cuts during 2000每2011 could be detected as a decrease in surface height by combining Digital Surface Models (DSMs) from the Shuttle Radar Topography Mission (SRTM) and Tandem-X, and to evaluate the performance of this method using SRTM X- and C-band data as references representing the heights before logging. The study area was located in a Norway spruce-dominated forest estate in southeastern Norway. We interpolated 11-year DSM changes into a 10 m ℅ 10 m raster, and averaged these changes per forest stand. Based on threshold values for DSM decreases we classified the pixels and stands into the categories ※clear-cut§ and ※not clear-cut§, and compared this to a complete record of logged stands during 2000每2011. The classification accuracy was moderate or fairly good. A correct detection was achieved for 59%每67% of the clear-cut stands. Omission errors were most common, occurring in 33%每42% of the stands. Commission errors were found in 13%每21% of the clear-cut stands. The results obtained for X-band SRTM were only marginally better than for C-band. In conclusion, the combination of SRTM and Tandem-X has the potential of providing near global data sets for the recent 12 years＊ logging, which should be particularly valuable for deforestation mapping.
%K forest monitoring
%K clear-cut
%K digital surface model
%K Tandem-X
%K 3D
%K InSAR
%U http://www.mdpi.com/2072-4292/5/11/5449