The Swedish NFI - Metla
Transcript of The Swedish NFI - Metla
Development last five years
90th anniversary in 2013!
Design o Still a combination of permanent (2/3 in red) and
temporary (1/3 in blue) tracts
o From 2013 enlarged sample of temporary tracts, +
12%, i.e. + 5% in all.
0
500
1000
1500
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2500
1983-1987 1988-1992 1993-1997 1998-2002 2003-2007 2008-2012 2013-2015
# of tracts (sampling units) in the Swedish NFI 1983-2015
Design/Scope
o Still a combination of permanent (2/3) and temporary (1/3) tracts
o From 2013 enlarged sample of temporary sampling units (tracts), + 12%,
i.e. totally + 5%
o From 2016 the NFI and the Swedish Forest Soil Inventory will start to
execute field inventory on Forest- and OWL-plots within the alpine area of
Sweden
Pilot inventory August-September 2015
Design/Scope
o Still a combination of permanent (2/3) and temporary (1/3) tracts
o From 2013 enlarged sample of temporary sampling units (tracts), + 12%,
i.e. totally + 5%
o From 2016 the NFI and the SFSI will start to execute field inventory on
Forest- and OWL-plots within the alpine area of Sweden
Pilot inventory August-September 2015
Total national estimates for Forest and OWL regarding growing stock,
annual increment, dead wood, AGB, BGB (and carbon) will for the first
time be reported to the next FRA/Forest Europe (2020?)
Data Collection
o 2011: Introduction of a new software package for field inventory
o 2013: The NFI and the Swedish National Soil Inventory fully integrated
Improved support for quality assurance, corrections, control-inventory,
calibration and training
o 2015: Introduction of new software and hardware for measurement of bore-
cores
Improved quality assurance, improved ergonomics, more efficient
Data Collection
o 2011: Introduction of a new software package for field inventory
o 2013: The NFI and the Swedish National Soil Inventory fully integrated
Improved support for quality assurance, corrections, control-inventory
and calibration and training
o 2015: Introduction of new software and hardware for measurement of bore-
cores
Improved quality assurance, improved ergonomics, more efficient
o Delivery of a complete and correct field DB in the end of December, i.e. two
months after finishing the field work in October
Data Collection (cont.)
o We still use Garmin (GPSMAP 64) for navigation and determination of
position
o 2009-2015: Tests of several recievers for high-precision position (E.g.
Arrow 100©, Trimble R1©) without finding a cost-effective solution
Official statistics, reporting and accessability
o 2013: Introduction of a totally new system for reporting using SQL Server
and OLAP cube
o Since 2013 annual official national statistics are produced using OLAP-
cubes, MS Excel and cube-formulas
o Large part of custumized reports produced using OLAP-cubes and MS
PowerPivot
o 2015: Thanks to the new systems for data capture and reporting, national
official statistics with data from 2014 were published in May 2015, 5
months earlier than before
o Data for calibration: Data from temporary plots free to download from the
NFI-web site
o TaxWeb II; a public interactive tool for NFI-estimates will be launched in
the end of September (separate presentation by Per Nilsson at 13.45
today)
Larger projects and research (some examples)
o Digitalization of the 1st NFI (1923-29) almost finished, 2nd (1938-52)
ongoing.
o 2014-2015: Skogliga grunddata => In close co-operation with the Swedish
Forest Agency, NFI-data has been used in combination with ALS-data
producing wall to wall estimates of volume, height biomass etc. (separate
presentation by Mats Nilsson at 12.00 today)
o 2014-2015: SKA 15 => In close co-operation with the Swedish Forest
Agency national long term consequence analysis are performed that will
give answers on sustainable logging levels, effects on conservation values,
climate change effects on forests and forestry.
o 2015-2016: ”Implementing model-assisted estimation techniques in the
Swedish national forest and landscape surveys”
(separate presentation by Göran Ståhl at 08.45 tomorrow)
Scientific publications
o 2014: 10 scientific papers were published where NFI-data has been
used. Authors both from the NFI-staff and others:
• Fridman, J., S. Holm, M. Nilsson, P. Nilsson, A. H. Ringvall and G. Stahl. "Adapting
National Forest Inventories to changing requirements - the case of the Swedish
National Forest Inventory at the turn of the 20th century." Silva Fennica 48(3): 1095-
article id 1095.
• Brandl, S., W. Falk, H.-J. Klemmt, G. Stricker, A. Bender, T. Roetzer and H. Pretzsch.
"Possibilities and Limitations of Spatially Explicit Site Index Modelling for Spruce Based
on National Forest Inventory Data and Digital Maps of Soil and Climate in Bavaria (SE
Germany)." Forests 5(11): 2626-2646.
• Fahlvik, N., B. Elfving and P. Wikstrom. "Evaluation of growth models used in the
Swedish Forest Planning System Heureka." Silva Fennica 48(2).
• Lindbladh, M., A.-L. Axelsson, T. Hultberg, J. Brunet and A. Felton. "From broadleaves
to spruce – the borealization of southern Sweden." Scandinavian Journal of Forest
Research 29(7): 686-696.
• Loefgren, S., M. Froeberg, J. Yu, J. Nisell and B. Ranneby. "Water chemistry in 179
randomly selected Swedish headwater streams related to forest production, clear-felling
and climate." Environmental Monitoring and Assessment 186(12): 8907-8928.
• Lundstrom, J., K. Ohman, M. Ronnqvist and L. Gustafsson. "How reserve selection is
affected by preferences in Swedish boreal forests." Forest Policy and Economics 41:
40-50.
• Löfgren, S., M. Fröberg, J. Yu, J. Nisell and B. Ranneby. "Water chemistry in 179
randomly selected Swedish headwater streams related to forest production, clear-felling
and climate." Environmental Monitoring and Assessment 186(12): 8907-8928.
• Stahl, G., J. Heikkinen, H. Petersson, La, Jr. and S. Holm. "Sample-Based Estimation
of Greenhouse Gas Emissions From Forests-A New. Approach to Account for Both
Sampling and Model Errors." Forest Science 60(1): 3-13.
• Söderberg, U., S. Wulff and G. Ståhl. "The choice of definition has a large effect on
reported quantities of dead wood in boreal forest." Scandinavian Journal of Forest
Research 29(3): 252-258.
• Valinger, E., G. Kempe and J. Fridman. "Forest management and forest state in
southern Sweden before and after the impact of storm Gudrun in the winter of 2005."
Scandinavian Journal of Forest Research 29(5): 466-472.