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The potential of data from national forest inventory in a landscape ecological context

机译：景观生态背景下国家森林库存数据的潜力

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Forest inventory data on the national scale cover a broad range of information. Attributes on forest production still play an important role, however ecologically relevant data on forest structure and species diversity get increasing attention. Typically, forest inventories are sample based and the estimation of ecological relevant information from inventory data is restricted. Indicators as e.g. patch perimeter are usually measured from maps, if those indicators cannot be measured directly - e.g. due to the absence of maps- it might be of interest how they could be estimated from sample based inventory data. Methods to estimate the forest boundary length are presented and applied to data of the second Swiss National Forest Inventory (NFI). The forest area definition of the Swiss NFI is based on fine grain data derived from air photo plots classified to nonforest and forest categories. Both, original photo plot interpretation data as well as the relationship between the classification results; (1) interior forest plots, (2) nonforest plots and (3) forest plots intersecting a forest border are employed. The presented methods allow to estimate forest boundary length figures from successive inventory occasions and thus add a landscape ecological component to already established sample based inventory systems.
机译：国家规模的森林库存数据涵盖了广泛的信息。森林产量的属性仍在发挥重要作用，但对森林结构和物种多样性的生态相关数据越来越关注。通常，森林清单是基于样本的，并且限制了来自库存数据的生态相关信息的估计。指标如例如。如果这些指示器不能直接测量，通常会从地图测量贴片周长 - 例如，由于没有地图 - 它可能是兴趣如何从基于样本的库存数据估算它们。估计森林边界长度的方法呈现并应用于第二瑞士国家森林库存（NFI）的数据。瑞士NFI的森林区域定义是基于源自非林和林类类别的空气光图的细粒度数据。两者，原始照片绘制解释数据以及分类结果之间的关系; （1）内部森林图，（2）非森林地块和（3）森林地块与森林边界交往。所提出的方法允许从连续库存场合估计森林边界长度数字，从而增加景观生态成分以建立基于样本的库存系统。

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