期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXVI-8/W2
出版社：Copernicus Publications
摘要：Based on experiences from the NATSCAN-project this contribution focuses on the evaluation of two hypotheses: (i) Terrestrial laser scanning and corresponding data analysis is ready to be used in standardized forest inventory sampling. (ii) Data quality as well as characteristics related to the technique of laser scanning widen the data base for forest management applications and ecological investigations. First the characteristics of information needs for forest management planning are presented (such as number of sample plots, interesting parameters etc.). In a second step process and measurement setup of terrestrial scanning of forest sceneries are described. Exemplary results of two different scanning modes, i. e. single-scan-modus and multiple-scan-modus, are compared in respect to the inventory parameters of diameter in breast height (DBH), tree height and height of crown base. The investigation was carried out on a mixed stand of beech and oak with silver-fir and beech in intermediate and suppressed crown layers. Results were evaluated with the help of conventional measurements of these parameters and are discussed to prove the hypotheses (i). Technical aspects connected with data collection, data analysis and possible error sources are summarized and options for future improvements are presented. Possibilities of terrestrial laser scanning which exceed the limits of conventional inventories, such as quality assessment of standing trees, are also added (ii). Advantages of the technique for inventory purposes are for example the high reproducibility of the results of the measurements and the possibility to store information as a data pool for future applications. A final appeal to make use of terrestrial laser scanning for forest and landscape assessment on a larger scale concludes the results. It is argued that while terrestrial laser scanning offers new options for the assessment of natural sceneries, it must in the current situation be conducted under careful consideration of economic aspects
关键词：DEM/DTM; diameter at breast height (DBH); forest inventory; forestry; height of crown base; modelling; ; terrestrial laser scanning; tree height
