National Forest Inventory of Finland Past ,
نویسنده
چکیده
منابع مشابه
National Forest Inventory of Finland — Past, Present and Future
Finland’s forest resources have been investigated by means of National Forest Inventories since 1921. The inventories have produced a detailed picture of forest resources and the state of forests as well as long time series. Although the structure of the growing stock and the forest balance have been the most important characteristics, the whole scope is much wider, including information on for...
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Leaf area index (LAI) is a key variable for many ecological models, but it is typically not available from basic forest inventories. In this study, we (1) construct a high-resolution LAI map using k nearest-neighbor (k-NN) imputation based on National Forest Inventory data and Landsat 5 TM images (Landsat-NFI LAI), and (2) examine a moderate-resolution LAI map produced based on reduced simple r...
متن کاملAirborne Laser Scanning for the Site Type Identification of Mature Boreal Forest Stands
In Finland, forest site types are used to assess the need of silvicultural operations and the growth potential of the forests and, therefore, provide important inventory information. This study introduces airborne laser scanner (ALS) data and the k-NN classifier data analysis technique applicable to the site quality assessment of mature forests. Both the echo height and the intensity value perc...
متن کاملEmpirical Errors of Small Area Esti- mates from the Multisource National Forest Inventory in Eastern Finland
The precision of multisource national forest inventory (MS-NFI) estimators and simple synthetic estimators based on NFI field data only was assessed employing an independent inventory data set of several small areas in Eastern Finland. There were seven test units of size 100 km2 and three test units of size 1 km2 for which a systematic field sampling was carried out. The ‘improved’ MS-NFI metho...
متن کاملDelineation of forest/nonforest land use classes using nearest neighbor methods
The k-Nearest Neighbor (kNN) method of forest attribute estimation and mapping has become an integral part of national forest inventory methods in Finland in the last decade. This success of kNN method in facilitating multi-source inventory has encouraged trials of the method in the Great Lakes Region of the United States. Here we present results from applying the method to Landsat TM and ETM+ ...
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