ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-3/W4, 63-69, 2015
http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-3-W4/63/2015/
doi:10.5194/isprsannals-II-3-W4-63-2015
© Author(s) 2015. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
11 Mar 2015
FOREST INVENTORY ATTRIBUTE ESTIMATION USING AIRBORNE LASER SCANNING, AERIAL STEREO IMAGERY, RADARGRAMMETRY AND INTERFEROMETRY–FINNISH EXPERIENCES OF THE 3D TECHNIQUES
M. Holopainen1,2, M. Vastaranta1,2, M. Karjalainen3, K. Karila3, S. Kaasalainen3, E. Honkavaara3, and J. Hyyppä2,3 1Dept. Forest Sciences, University of Helsinki, P.O.Box 27, 00014 University of Helsinki, Finland
2Centre of Excellence in Laser Scanning Research, P.O.Box 15, 02431 Masala, Finland
3Dept. of Photogrammetry and remote sensing, Finnish Geospatial Research Institute, P.O.Box 15, 02431 Masala, Finland
Keywords: Remote sensing, airborne laser scanning, aerial stereo imagery, SAR radargrammetry, SAR interferometry, random forest, sample plot, area-based approach, forest inventory, forest management planning, GIS Abstract. Three-dimensional (3D) remote sensing has enabled detailed mapping of terrain and vegetation heights. Consequently, forest inventory attributes are estimated more and more using point clouds and normalized surface models. In practical applications, mainly airborne laser scanning (ALS) has been used in forest resource mapping. The current status is that ALS-based forest inventories are widespread, and the popularity of ALS has also raised interest toward alternative 3D techniques, including airborne and spaceborne techniques. Point clouds can be generated using photogrammetry, radargrammetry and interferometry. Airborne stereo imagery can be used in deriving photogrammetric point clouds, as very-high-resolution synthetic aperture radar (SAR) data are used in radargrammetry and interferometry. ALS is capable of mapping both the terrain and tree heights in mixed forest conditions, which is an advantage over aerial images or SAR data. However, in many jurisdictions, a detailed ALS-based digital terrain model is already available, and that enables linking photogrammetric or SAR-derived heights to heights above the ground. In other words, in forest conditions, the height of single trees, height of the canopy and/or density of the canopy can be measured and used in estimation of forest inventory attributes. In this paper, first we review experiences of the use of digital stereo imagery and spaceborne SAR in estimation of forest inventory attributes in Finland, and we compare techniques to ALS. In addition, we aim to present new implications based on our experiences.
Conference paper (PDF, 1051 KB)


Citation: Holopainen, M., Vastaranta, M., Karjalainen, M., Karila, K., Kaasalainen, S., Honkavaara, E., and Hyyppä, J.: FOREST INVENTORY ATTRIBUTE ESTIMATION USING AIRBORNE LASER SCANNING, AERIAL STEREO IMAGERY, RADARGRAMMETRY AND INTERFEROMETRY–FINNISH EXPERIENCES OF THE 3D TECHNIQUES, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-3/W4, 63-69, doi:10.5194/isprsannals-II-3-W4-63-2015, 2015.

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