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Remote Sens. 2015, 7(4), 4253-4267; doi:10.3390/rs70404253

Using Optical Satellite Data and Airborne Lidar Data for a Nationwide Sampling Survey

Department of Forest Resource Management, Swedish University of Agricultural Sciences, SE 90183 Umeå, Sweden
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Author to whom correspondence should be addressed.
Academic Editors: Norbert Pfeifer, András Zlinszky, Hermann Heilmeier, Heiko Balzter, Bernhard Höfle, Bálint Czúcz, Nicolas Baghdadi and Prasad S. Thenkabail
Received: 1 January 2015 / Revised: 22 March 2015 / Accepted: 1 April 2015 / Published: 9 April 2015
(This article belongs to the Special Issue Remote Sensing and GIS for Habitat Quality Monitoring)
View Full-Text   |   Download PDF [26900 KB, uploaded 9 April 2015]   |  

Abstract

A workflow for combining airborne lidar, optical satellite data and National Forest Inventory (NFI) plots for cost efficient operational mapping of a nationwide sample of 5 × 5 km squares in the National Inventory of Landscapes in Sweden (NILS) landscape inventory in Sweden is presented. Since the areas where both satellite data and lidar data have a common data quality are limited, and impose a constraint on the number of available NFI plots, it is not feasible to perform classifications in a single step. Instead a stratified approach where canopy cover and canopy height are first predicted from lidar data trained with NFI plots is proposed. From the lidar predictions a forest stratum is defined as grid cells with more than 3 m mean tree height and more than 10% vertical canopy cover, the remaining grid cells are defined as open land. Both forest and open land are then classified into broad vegetation classes using optical satellite data. The classification of open land is trained with aerial photo interpretation and the classification of the forest stratum is trained with a new set of NFI plots. The result is a rational procedure for nationwide sample based vegetation characterization. View Full-Text
Keywords: lidar; operational; Landsat; nationwide; sampling; mapping lidar; operational; Landsat; nationwide; sampling; mapping
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lindgren, N.; Christensen, P.; Nilsson, B.; Åkerholm, M.; Allard, A.; Reese, H.; Olsson, H. Using Optical Satellite Data and Airborne Lidar Data for a Nationwide Sampling Survey. Remote Sens. 2015, 7, 4253-4267.

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