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ForestScan Project : Terrestrial Laser Scanning (TLS) of FBRMS-02: Station d’Etudes des Gorilles et Chimpanzés, Lopé National Park, Gabon 1ha plot OKO-03, June to July 2022

Terrestrial laser scanning (TLS) was conducted at three ForestScan 1ha (100m x 100m) Forest Biomass Reference Measurement Site (FBRMS) plots in Gabon from June to July 2022 by Cecilia Chavana-Bryant using a Riegl VZ-400i scanner. Data collection assistance was provided by Heddy O. Milamizokou Napo, Luna Soenens and Virginie Daelemans, data processing assistance was provided by Mr Peter Vines. This data collection was part of the European Space Agency (ESA) funded ForestScan project designed to improve the use of new Earth Observation (EO) estimates of above ground biomass (AGB) by providing TLS-, unmanned airborne vehicles (UAV-LS)- and airborne (ALS) LiDAR scanning-derived AGB and tree census data to compare to allometric and EO-derived estimates.

Scans were acquired using chain sampling at 121 locations along a 10m Cartesian grid to ensure sufficient data overlap to produce high-quality point clouds for all ForestScan 1ha FBRMS plots. Due to the scanner's 100° field of view, capturing a complete sample of the scene at each scan location required two scans -an upright scan and a tilt scan. Upright scans are odd-numbered while tilt scans are even-numbered. The first scan at each plot is collected at the southwest corner, i.e. scan position 0,0 (unless something impedes it, e.g. stream, large tree fall, etc. or if the plot is oriented differently). To facilitate scan registration, five retro-reflective targets were located between scan positions with all tilt scans along the first sampling line were oriented towards the same sampling position along the next sampling line and tilt scans at the ends of sampling lines (i.e. tilt scans along plot edges) were oriented towards the inside of the plot. This aids scan registration as it allows tilt scans to capture the previous scan location within its field of view. A total of 242 scans were collected at each plot.

The Riegl operating and processing software RiSCAN PRO version 2.14.1 was used to generate a plot-level point cloud, scans were coarse registered using the shared retro-reflective targets located between consecutive scan positions. Coarse registration was then fine-tuned using Multi Station Adjustment 2 (MSA2).

Data for each of the four FBRMS plots is found within plot directories: LPG-01, OKO-01, OKO-02 and OKO-03. Plot directories contain a main project directory (named using the starting date of data collection, e.g. 2022-07-04_OKO-03.PROJ) with nine data subdirectories and a tile_index.dat file as shown in the archived document /neodc/forestscan/data/gabon/lope/TLS_lope_2022/OKO-03/ForestScan_example_data_directory_structure.pdf which details the data structure shared by all FBRSM plot TLS datasets.

Simple

Date (Publication)
2025-03-27T15:28:45
Date (Creation)
2025-03-27T15:28:45
Identifier
https://catalogue.ceda.ac.uk/uuid/8ed3ddec76b8470285bdb2ea643f54bc
Identifier
NERC EDS Centre for Environmental Data Analysis / 8ed3ddec76b8470285bdb2ea643f54bc
Identifier
doi / 10.5285/8ed3ddec76b8470285bdb2ea643f54bc
Author
  Unavailable - Chavana-Bryant, Cecilia ( author )
Author
  Unavailable - Wilkes, Phil ( author )
Author
  Unavailable - Yang, Wanxin ( author )
Author
  Unavailable - Burt, Andrew ( author )
Author
  Unavailable - Vines, Peter ( author )
Author
  Unavailable - Bennett, Amy C. ( author )
Author
  Unavailable - Pickavance, Georgia C. ( author )
Author
  Unavailable - Cooper, Declan L.M. ( author )
Author
  Unavailable - Lewis, Simon L. ( author )
Author
  Unavailable - Phillips, Oliver L. ( author )
Author
  Unavailable - Brede, Benjamin ( author )
Author
  Unavailable - Lau, Alvaro ( author )
Author
  Unavailable - Herold, Martin ( author )
Author
  Unavailable - McNicol, Iain M. ( author )
Author
  Unavailable - Mitchard, Edward T.A. ( author )
Author
  Unavailable - Coombes, David ( author )
Author
  Unavailable - Jackson, Toby D. ( author )
Author
  Unavailable - Makaga, Löic ( author )
Author
  Unavailable - Milamizokou Napo, H O ( author )
Author
  Unavailable - Ngomanda, Alfred ( author )
Author
  Unavailable - Ntie, Stephan ( author )
Author
  Unavailable - Medjibe, Vincent ( author )
Author
  Unavailable - Dimbonda, Pacôme ( author )
Author
  Unavailable - Soenens, Luna ( author )
Author
  Unavailable - Daelemans, Virginie ( author )
Author
  Unavailable - Proux, Letitia ( author )
Author
  Unavailable - Nilus, Reuben ( author )
Author
  Unavailable - Labrière, Nicolas ( author )
Author
  Unavailable - Jeffery, Kathryn ( author )
Author
  Unavailable - Burslem, David F.R.P. ( author )
Author
  Unavailable - Clewley, Daniel ( author )
Author
  Unavailable - Moffat, David ( author )
Author
  Unavailable - Qie, Lan ( author )
Author
  Unavailable - Bartholomeus, Harm ( author )
Author
  Unavailable - Vincent, Grégoire ( author )
Author
  Unavailable - Barbier, Nicolas ( author )
Author
  Unavailable - Derroire, Géraldine ( author )
Author
  Unavailable - Abernethy, Kate ( author )
Author
  Unavailable - Scipal, Klaus ( author )
Author
  Unavailable - Disney, Mathias ( author )
Custodian
  NERC EDS Centre for Environmental Data Analysis - custodian
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
Distributor
  NERC EDS Centre for Environmental Data Analysis - distributor
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
Principal investigator
  Unavailable - Disney, Mathias ( principal_investigator )
pointofContact
  NERC EDS Centre for Environmental Data Analysis - point_of_contact
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
Publisher
  NERC EDS Centre for Environmental Data Analysis - publisher
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
Maintenance and update frequency
unknown Unknown
Update scope
dataset Dataset
Keywords
  • ForestScan project
  • GEO-TREES
  • BIOMASS mission
  • European Space Agency (ESA)
  • Earth Observation (EO) calibration/validation
  • Terrestrial LiDAR Scanning (TLS)
  • Unpiloted Aerial Vehicle LiDAR Scanning (UAV-LS)
  • Aerial LiDAR Scanning (ALS)
  • Digital twins
  • Above Ground Biomass (AGB) estimates
  • Carbon estimates
  • Forest structure
  • Tree segmentation
  • 3D tree structure
  • Field protocols
GEMET - INSPIRE themes, version 1.0
  • orthoimagery
Access constraints
otherRestrictions Other restrictions
Other constraints
Public data: access to these data is available to both registered and non-registered users.
Use constraints
otherRestrictions Other restrictions
Other constraints
Under the following licence http://creativecommons.org/licenses/by/4.0/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Spatial representation type
grid Grid
Metadata language
EnglishEnglish
Topic category
  • Imagery base maps earth cover
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Begin date
2022-07-04T00:00:00
End date
2022-07-10T00:00:00
Unique resource identifier
WGS 84
Distribution format
  • Terrestrial LiDAR scanner data in csv, point cloud and Riegl Proprietary raw data format. Details of formats and data structure can be found in the archived document /neodc/forestscan/data/gabon/lope/TLS_lope_2022/OKO-03/ForestScan_example_data_directory_structure.pdf which details the data structure shared by all FBRSM plot TLS datasets. Further explanation of the files and their origin can also be found in the process computation section. ()

Distributor
  NERC EDS Centre for Environmental Data Analysis - Data Center Contact
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
OnLine resource
CEDA Data Catalogue Page

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Chavana-Bryant, C., Wilkes, P., Yang, W., Burt, A., Vines, P., Bennett, A.C., Pickavance, G., Cooper, D.L.M., Lewis, S.L., Phillips, O.L., Brede, B., Lau, A., Herold, M., McNicol, I.M., Mitchard, E.T.A., Barbier, N., Vincent, G., Coomes, D.A., Jackson, T., Makaga, L., Milamizokou Napo, H.O., Ngomanda, A., Ntie, S., Medjibe, V., Dimbonda, P., Soenens, L., Daelemans, V., Bartholomeus, H., Majalap, N., Nilus, R., Labrière, N., Burslem, D.F.R.P., Qie, L., Derroire, G., Proux, L., Abernethy, K., Jeffery, K., Clewley, D., Moffat, D., Scipal, K. and Disney, M. ForestScan: a unique multiscale dataset of tropical forest structure across 3 continents including terrestrial, UAV and airborne LiDAR and in-situ forest census data. ESSD. 2025

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dataset Dataset

Conformance result

Date (Publication)
2010-12-08
Statement
Data were produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA).
File identifier
8ed3ddec76b8470285bdb2ea643f54bc XML
Metadata language
EnglishEnglish
Character set
8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 UTF8
Parent identifier
ForestScan Collection 88a8620229014e0ebacf0606b302112d
Hierarchy level
dataset Dataset
Date stamp
2025-11-15T03:25:51
Metadata standard name
UK GEMINI
Metadata standard version
2.3
Point of contact
  NERC EDS Centre for Environmental Data Analysis
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
 
 

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Keywords

GEMET - INSPIRE themes, version 1.0
orthoimagery

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