• South America
  •  
  •  
  •  

French Guiana landscape map 2012

This landscape dataset was built using Shuttle Radar Topography Mission (SRTM) data with full resolution (1 arc sec ~ 30m). This map aims at evaluating the geodiversity of natural areas. Twelve landscape types into 5 main categories have been identied with respect to Migon's typology (2006): the coastal plains landscapes (AA. AB. AC); the typical multi-convex landscapes (B. I. J); the multi-concave and joint-valley landscapes (C.D); the more or less dissected plateau (E.F.G) and the all-slopes topography (H). The map was produced at the request of the French Guianan public forest manager of the Office National des Forêts (ONF).

Simple

Date (Création)
2012-01-01
Identificateur
CEBA_landscape2012
Etat
Finalisé
Contact pour la ressource
Nom de l'organisation Nom de la personne Adresse e-mail Rôle

Office national des forêts (ONF)

Guitet, Stéphane

stephane.guitet@onf.fr

Point of contact
Fréquence de mise à jour
Non planifiée

GEMET - INSPIRE themes, version 1.0 INSPIRE themes

  • Geology

GEMET - Concepts, version 2.4

  • relief (land)

  • geomorphology

Geounits

  • South America

  • Americas

  • France

  • French Guiana

Mots clés
  • national coverage

  • labex CEBA

Localisation
Limitation d'utilisation

Please get in touch with a point of contact.

Contraintes d'accès
Droit de propriété intellectuelle / Droit patrimonial
Restrictions de manipulation
Non classifié
Type de représentation spatiale
Raster
Dénominateur de l'échelle
1000000
Langue de la ressource

eng

Encodage des caractères
Utf8
Catégorie ISO
  • Sciences de la terre, géosciences
N
S
E
W


Date de début
2012-01-01
Date de fin
2012-01-01
Informations supplémentaires

Bibliography: Guitet S.. Cornu J.-F.. Brunaux O.. Betbeder J.. Carozza J.-M. Richard-Hansen C.(2013) : Landform & landscape mapping. French Guiana (South America). Journal of Map. DOI:10.1080/17445647.2013.785371

Nom du système de référence
EPSG / WGS 84 / UTM zone 22N (EPSG:32622) / 7.9
Format (encodage)
Nom Version

ESRI Shapefile

1.0

Ressource en ligne
Protocole Adresse Internet Nom

WWW:LINK-1.0-http--related

http://www.tandfonline.com/doi/abs/10.1080/17445647.2013.785371

Guitet S.. Cornu J.-F.. Brunaux O.. Betbeder J.. Carozza J.-M. Richard-Hansen C.(2013) : Landform & landscape mapping. French Guiana (South America). Journal of Map. DOI:10.1080/17445647.2013.785371

Niveau
Jeu de données
Généralités sur la provenance

The landscape map was computed by analyzing the spatial distribution of the different types of landforms. This analysis was conducted in five steps. At first. a manual expert segmentation was performed based on landforms spatial distribution, searching to draw homogenous region based on repeated pattern or dominant type. Secondly, 3 local indices were computed from the landforms map on 1.5 x 1.5 km sliding windows: the Shannon-weaver diversity index, the contagion index, and the majority index (O'Neill et al.. 1988, Mc Garigal et al.. 2002). Thirdly, each boundary of the manual segmentation was compared with maps of the 3 indices for validation. In case of inconsistency, the landscape segmentation was modified in the light of the spatial variability of these indices. Then another Principal Components Analysis was performed with 14 variables computed for each region (average Shannon index. average Contagion index and relative proportions of the 12 different types). A hierarchical cluster analysis was performed to assign each unit to a natural landscape type. At last, permutations tests were used to highlight relations between landscape and landforms type and to interpret them. The different maps and models were compared to topographic field data that have been collected on 92 transects totalizing 260 km length. These data including natural habitat descriptions, topographic profiles, and soil collections were collected on 24 sites distributed through French Guiana in order to represent the maximum of geographic and ecological variability. Habitat descriptions are used to validate the hydromorphy model. Slope, elevation levels and topographic position occurrence measured on the transect help to interpret landforms and landscape classes. A Garmin GPS (60CSX) was used to geolocalize the data. Slope angles and distances were measured with Vertex laser rangefinder. Landscape analysis was conducted with Fragstat freeware v2 (Mc Garigal et al.. 2002) and statistical analyses with the R1.9 package (Team. 2009). The landscape map. based on landforms analysis. has to be used at the scale 1:1 000 000 to 1:2 000 000.

Métadonnées

Identifiant de la fiche
f47e6c32-5b44-4923-92c7-35bf82e0b797 XML
Langue

eng

Jeu de caractères
Utf8
Type de ressource
Jeu de données
Date des métadonnées
2018-12-07T06:01:39
Nom du standard de métadonnées

ISO 19115:2003/19139

Version du standard de métadonnées

1.0

Contact
Nom de l'organisation Nom de la personne Adresse e-mail Rôle

Office national des forêts (ONF)

Guitet, Stéphane

stephane.guitet@onf.fr

Point of contact

Institut de recherche pour le développement (IRD)

AMAP géoportail

amap.geoportail@ird.fr

Point of contact
 
 

Aperçus

thumbnail
large_thumbnail

Étendue spatiale

N
S
E
W


Mots clés

labex CEBA national coverage
GEMET - Concepts, version 2.4
geomorphology relief (land)
GEMET - INSPIRE themes, version 1.0 INSPIRE themes
Geology

Fourni par

Lien vers le portail
Consultez l'intégralité des métadonnées et accédez à la donnée.

Ressources associées

Not available


  •  
  •  
  •