THE ACCURACY OF NATIONAL ALS DATA IN BIOMASS MAPPING IN FINLAND

Ville Kankare*, Jari Vauhkonen, Markus Holopainen, Mikko Vastaranta, Juha Hyyppä, Hannu Hyyppä, Petteri Alho

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

The demand for cost-efficient aboveground biomass (AGB) mapping applications at all forest levels is growing worldwide. Airborne laser scanning (ALS) is a promising mapping technique, due to its capability for measuring three-dimensional vegetation structure. The National Land Survey of Finland (NLS) began collecting ALS data throughout Finland in 2008, and collected dataset has great potential for and a wide variety of possible applications in forestry. The main objective of the study was to evaluate the accuracy of NLS's ALS data in estimation of plot-level AGB and to compare it with existing large-scale forest-mapping techniques, which utilizes satellite imagery and ground plots. The results showed that ALS data can be used to estimate AGB with accuracy of 26.1-38.1%. The accuracy was significantly higher than in MS-NFI which was caused by differences in the RS data utilized To fully utilize the potential of NLS's ALS data, the following questions should be addressed: 1) the optimal amount of training data required for nearest neighbour estimation, 2) calibration of the ALS data caused by leaf-off situations and 3) effect of varying scanning equipment and parameters on the estimation accuracy. The supportive strengths of the nationally available ALS data are the low costs of the data and the need for new more accurate and cost-efficient methods to map and monitor forest AGBs.

Original languageEnglish
Title of host publicationPAPERS OF THE 22ND EUROPEAN BIOMASS CONFERENCE: SETTING THE COURSE FOR A BIOBASED ECONOMY
EditorsC Hoffman, D Baxter, K Maniatis, A Grassi, P Helm
PublisherETA Florence
Pages47-52
Number of pages6
Publication statusPublished - 2014
MoE publication typeA4 Article in a conference publication
EventEuropean International Biomass Conference - Setting the Course for a Biobased Economy - Hamburg, Germany
Duration: 23 Jun 201426 Jun 2014
Conference number: 22

Conference

ConferenceEuropean International Biomass Conference - Setting the Course for a Biobased Economy
CountryGermany
CityHamburg
Period23/06/201426/06/2014

Keywords

  • Biomass
  • resources
  • mapping
  • remote sensing
  • laser scanning
  • SMALL-FOOTPRINT LIDAR
  • FOREST INVENTORY DATA
  • GROUND REFERENCE DATA
  • ABOVEGROUND BIOMASS
  • NORWAY SPRUCE
  • STEM VOLUME
  • VARIABLES
  • PINE
  • COMBINATION
  • PREDICTION

Cite this

Kankare, V., Vauhkonen, J., Holopainen, M., Vastaranta, M., Hyyppä, J., Hyyppä, H., & Alho, P. (2014). THE ACCURACY OF NATIONAL ALS DATA IN BIOMASS MAPPING IN FINLAND. In C. Hoffman, D. Baxter, K. Maniatis, A. Grassi, & P. Helm (Eds.), PAPERS OF THE 22ND EUROPEAN BIOMASS CONFERENCE: SETTING THE COURSE FOR A BIOBASED ECONOMY (pp. 47-52). ETA Florence.