ABSTRACT Airborne laser scanning (ALS) is increasingly being used to detect cultural remains in forest landscapes. Boreal forests are challenging, however, since most ancient land use was carried out without major permanent ground disturbances. If this challenge can be met, there is a large potential for surveys through existing nation-wide laser-scanning programs, although their resolutions tend to be low. In this study, we compare the performance of low-resolution (LR) and high-resolution (HR) ALS data in the Krycklan catchment in northern Sweden, an area where ancient land use was small-scale and diverse. About three times as many cultural remains were detected in the HR data set, but the LR set was satisfactory for distinct structures. We analyze how LR data sets can be enhanced at ground-point classification and terrain-model generation and conclude that ALS data have a large potential for the detection and protection of cultural remains in the boreal forest.

中文翻译：

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使用不同分辨率的机载激光扫描数据检测瑞典北方森林的文化遗存

摘要机载激光扫描（ALS）越来越多地用于检测森林景观中的文化遗骸。然而，北方森林是具有挑战性的，因为大多数古代土地利用都是在没有重大永久性地面干扰的情况下进行的。如果能够解决这一挑战，尽管分辨率较低，但通过全国范围的现有激光扫描程序进行调查的潜力很大。在这项研究中，我们比较了瑞典北部Krycklan流域中低分辨率（LR）和高分辨率（HR）ALS数据的性能，该地区古老的土地利用规模小而多样。在HR数据集中检测到的文化遗骸大约是三倍，但是LR集合对于不同的结构而言是令人满意的。