Speulderbos forest field database

Contact: 
	Benjamin Brede <benjamin.brede@wur.nl>
	Wageningen University & Research, Laboratory of Geo-Information Science and Remote Sensing, Droevendaalsesteeg 3, 6708 PB Wageningen, the Netherlands

Website: http://www.wageningenur.nl/fbprv	
	
Licence: CC BY 4.0


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1. Data description

=== data

Terrestrial Laser Scanning (TLS) derived Plant Area Index (PAI)
== filenames: YYYY-MM-DD.P_POS.csv
Y ... year
M ... month
D ... day
P ... plot
POS ... position (within plot)

== file contents

column height ... height above scanner (starting ~1.4 m agl)
columns vz03750 ... viewing zenith angle bin 0 to 3.75°, values in colums = cumulative gap fraction (up to respective height)
hingePAI ... PAI at hinge angle (accumulative) (m2/m2)
hingePAVD ... plant area volume density (m2/m3)
linearPAI ... PAI based on all view zenith angles
linearPAVD ... PAVD based on all view zenith angles


=== meta

ESRI shapefiles:
TLS_Positions_UTM31N ... points, scan positions with attributes Name (plot name A to E) and position (b1 to b4, a5)
Plots_UTM31N_square ... polygons, plot definitions


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2. Relevant publications

Brede, B., Bartholomeus, H., Suomalainen, J., Clevers, J., Verbesselt, J., Herold, M., Culvenor, D., Gascon, F., 2016. The Speulderbos Fiducial Reference Site for Continuous Monitoring of Forest Biophysical Variables, in: Living Planet Symposium 2016, Prague, Czech Republic, 9-13 May 2016. Prague, p. 5.

Brede, B., Gastellu-Etchegorry, J.-P., Lauret, N., Baret, F., Clevers, J., Verbesselt, J., & Herold, M. (2018). Monitoring Forest Phenology and Leaf Area Index with the Autonomous, Low-Cost Transmittance Sensor PASTiS-57. Remote Sensing, 10(7), 1032. http://doi.org/10.3390/RS10071032

Calders, K., Schenkels, T., Bartholomeus, H., Armston, J., Verbesselt, J., & Herold, M. (2015). Monitoring spring phenology with high temporal resolution terrestrial LiDAR measurements. Agricultural and Forest Meteorology, 203, 158–168. http://doi.org/10.1016/j.agrformet.2015.01.009