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Remote Sens. 2013, 5(11), 5449-5462; doi:10.3390/rs5115449
Article

Detection of Forest Clear-Cuts with Shuttle Radar Topography Mission (SRTM) and Tandem-X InSAR Data

1,* , 1
 and 2
Received: 3 September 2013; in revised form: 17 October 2013 / Accepted: 18 October 2013 / Published: 24 October 2013
(This article belongs to the Special Issue Analysis of Remote Sensing Image Data)
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Abstract: The aim of this study was to determine whether forest clear-cuts during 2000–2011 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 2000–2011. The classification accuracy was moderate or fairly good. A correct detection was achieved for 59%–67% of the clear-cut stands. Omission errors were most common, occurring in 33%–42% of the stands. Commission errors were found in 13%–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.
Keywords: forest monitoring; clear-cut; digital surface model; Tandem-X; 3D; InSAR forest monitoring; clear-cut; digital surface model; Tandem-X; 3D; InSAR
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Solberg, S.; Astrup, R.; Weydahl, D.J. Detection of Forest Clear-Cuts with Shuttle Radar Topography Mission (SRTM) and Tandem-X InSAR Data. Remote Sens. 2013, 5, 5449-5462.

AMA Style

Solberg S, Astrup R, Weydahl DJ. Detection of Forest Clear-Cuts with Shuttle Radar Topography Mission (SRTM) and Tandem-X InSAR Data. Remote Sensing. 2013; 5(11):5449-5462.

Chicago/Turabian Style

Solberg, Svein; Astrup, Rasmus; Weydahl, Dan J. 2013. "Detection of Forest Clear-Cuts with Shuttle Radar Topography Mission (SRTM) and Tandem-X InSAR Data." Remote Sens. 5, no. 11: 5449-5462.


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