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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-02, 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. 2022-06-10_OKO-02.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-02/ForestScan_example_data_directory_structure.pdf which details the data structure shared by all FBRSM plot TLS datasets

Simple

Date (Publication)
2025-03-27T15:24:15
Date (Creation)
2025-03-27T15:24:15
Citation identifier
https://catalogue.ceda.ac.uk/uuid/ff4b43475c9641cca1dad2c8be8dadaf
Citation identifier
NERC EDS Centre for Environmental Data Analysis / ff4b43475c9641cca1dad2c8be8dadaf
Citation identifier
doi / 10.5285/ff4b43475c9641cca1dad2c8be8dadaf
Point of contact
Organisation name Individual name Electronic mail address Role

Unavailable

Chavana-Bryant, Cecilia

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Author

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Wilkes, Phil

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Author

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Yang, Wanxin

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Author

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Burt, Andrew

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Author

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Vines, Peter

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Author

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Bennett, Amy C.

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Author

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Pickavance, Georgia C.

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Author

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Cooper, Declan L.M.

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Author

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Lewis, Simon L.

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Author

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Phillips, Oliver L.

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Author

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Brede, Benjamin

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Author

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Lau, Alvaro

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Author

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Herold, Martin

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Author

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McNicol, Iain M.

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Author

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Mitchard, Edward T.A.

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Author

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Coombes, David

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Author

Unavailable

Jackson, Toby D.

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Author

Unavailable

Makaga, Löic

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Author

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Milamizokou Napo, H O

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Author

Unavailable

Ngomanda, Alfred

Unavailable

Author

Unavailable

Ntie, Stephan

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Author

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Medjibe, Vincent

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Author

Unavailable

Dimbonda, Pacôme

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Author

Unavailable

Soenens, Luna

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Author

Unavailable

Daelemans, Virginie

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Author

Unavailable

Proux, Letitia

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Author

Unavailable

Nilus, Reuben

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Author

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Labrière, Nicolas

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Author

Unavailable

Jeffery, Kathryn

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Author

Unavailable

Burslem, David F.R.P.

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Author

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Clewley, Daniel

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Author

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Moffat, David

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Author

Unavailable

Qie, Lan

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Author

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Bartholomeus, Harm

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Author

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Vincent, Grégoire

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Author

Unavailable

Barbier, Nicolas

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Author

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Derroire, Géraldine

Unavailable

Author

Unavailable

Abernethy, Kate

Unavailable

Author

Unavailable

Scipal, Klaus

Unavailable

Author

Unavailable

Disney, Mathias

Unavailable

Author

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Custodian

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Distributor

Unavailable

Disney, Mathias

Unavailable

Principal investigator

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

pointofContact

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Publisher
Maintenance and update frequency
Unknown
Update scope
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
Other restrictions
Other constraints
Public data: access to these data is available to both registered and non-registered users.
Use constraints
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
Language
English
Topic category
  • Imagery base maps earth cover
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S
E
W
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Begin date
2022-06-10T00:00:00
End date
2022-06-23T00:00:00
Unique resource identifier
WGS 84
Distribution format
Name Version

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-02/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 contact
Organisation name Individual name Electronic mail address Role

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Distributor
OnLine resource
Protocol Linkage Name
https://catalogue.ceda.ac.uk/uuid/ff4b43475c9641cca1dad2c8be8dadaf

CEDA Data Catalogue Page

OnLine resource
Protocol Linkage Name
http://data.ceda.ac.uk/neodc/forestscan/data/gabon/lope/TLS_lope_2022/OKO-02/

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Hierarchy level
Dataset

Conformance result

Title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

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).

Metadata

File identifier
ff4b43475c9641cca1dad2c8be8dadaf XML
Metadata language
English
Character set
UTF8
Parent identifier
ForestScan Collection

88a8620229014e0ebacf0606b302112d

Hierarchy level
Dataset
Date stamp
2025-07-15T02:25:19
Metadata standard name
UK GEMINI
Metadata standard version

2.3

Metadata author
Organisation name Individual name Electronic mail address Role

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Point of contact
 
 

Overviews

Spatial extent

thumbnail

Keywords

GEMET - INSPIRE themes, version 1.0

orthoimagery


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