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for computation of SDs in forest areas of up to 1000 ha. For larger areas, grid point methods G500 or G1000 are recommended.
This study also showed that both buffer strip method and grid point methods can be efficiently used in computing SDs with high accuracy, which is similar to the empirical results of Janowsky (2001) and opposite to what Hentschel (1999) found, which suggested a buffer method is more proper in this respect than Segebaden’s (1964) grid point approach. DEMs and DTMs derived with state of the art remote sensing techniques (e.g. LIDAR) should be used for accurately mapping skid trails and forest roads (White et al. 2010). The data can be used in conjunction with GIS based tools, such as the methods presented in this study, for a more efficient and reliable assessment of primary and secondary forest traffic infrastructure.
This paper was supported by the Sectoral Operational Programme Human Resources Development (SOP HRD), ID76945 financed from the European Social Fund and by the Romanian Government. We would like to thank the two anonymous reviewers for their valuable comments and suggestions.
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