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：2005
卷号：XXXVI-3/W19
页码：115-119
出版社：Copernicus Publications
摘要：Countrywide collection of laser scanning, mainly due to DTM derivation, is becoming increasingly attractive. Since Finland is a large country, optimization of scanning parameters is important from the economical point of view. High altitude measurements with large scan angle would be cost-effective if accuracy requirements are fulfilled. In this study two cases are described. In Masala low altitude airborne laser scanning was compared to tacheometer measurements and in Sammatti high altitude Optech measurements were compared to dense Toposys Falcon measurements. The very first results indicate that scanning angle effect can still be moderate until 15 degrees and there seems to be other error sources of the same magnitude as the scanning angle error. High altitude laser scanning gives precision that is roughly about ±20 cm (std), which is good enough for most terrain models required in forested areas. There is a need to continue the studies of the effect of scanning angle on obtained accuracy
