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National Observation Service Dynalit, focuses on Coastline by BD ORTHO®, Reunion Island

The coastline or shoreline is the geographical boundary between sea and land. It corresponds according to the SHOM to "the leash of the highest seas in the context of an astronomical tide of coefficient 120 and under normal weather conditions (without overcost phenomenon). The coastline as defined above is not directly identifiable continuously on the ground or on a satellite or aerial image. From a perspective of studying the displacement of the shoreline, indicators allow us to approach this notion (the vegetation limit associated with the infrastructure limit, the beach limit, etc.).

On the reef shoreline of Reunion Island the limit of vegetation and infrastructure as well as beach limit were retained. This limit results in the production of a line-type vector geographic information layer in a GIS resulting from photo-interpolation on the orthophotos of IGN also called BD ORTHO. BD ORTHO is a component of the RGE®. These are digital color orthophotos supplied in raster format (tiff, ecw, ..). An orthophotography is a digital image that has the same metrics as a map of the same projection for the same elements on the ground. They have been available since 1997 in Réunion with a five-year repeatability. Their spatial resolution increased from 1 m in 1997 to 50 cm in 2003.

UMR Espace-Dev

Simple

Date (Creation)
2012-01-01T00:00:00
Presentation form
Digital map
Purpose
Réaliser des profils topographiques de 39 plages de la Réunion
Status
Under development
Originator
  Espace-Dev - Gwenaëlle Pennober ( Professor chaire mixte IRD / Université de la Réunion )
15, avenue René Cassin , Saint-Denis , Université de la Réunion , 97744 , France
+262 262 29 93 15
Maintenance and update frequency
As needed
Theme
  • Elevation
  • Reefal beach
  • BD ORTHO®
  • Dynalit
  • SNO "Traît de côte", littoral management
Place
  • Indian Ocean
  • Reunion island
Access constraints
Restricted
Use constraints
Restricted
Spatial representation type
Vector
Denominator
1
Metadata language
English
Character set
UTF8
Topic category
  • Geoscientific information
  • Elevation
Begin date
1997
End date
en cours...
N
S
E
W
thumbnail


Reference system identifier
EPSG : 4326
OnLine resource
vegetation limit ( WWW:LINK-1.0-http--link )

TC Saint-Gilles Reef - BD ORTHO - vegetation limit

OnLine resource
beach limit ( WWW:LINK-1.0-http--link )

TC Saint-Gilles Reef - BD ORTHO - Beach Limit

Hierarchy level
Dataset
File identifier
1db1604b-bfbc-4312-8c6f-dc7b10ebb78d XML
Metadata language
English
Character set
UTF8
Date stamp
2021-10-28T12:18:25
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0
Custodian
  UMS3365 - Rémy Decoupes ( IT Manager )
15, avenue René Cassin , Saint-Denis , Université de la Réunion , 97744 , France
+262 262 93 82 28
Custodian
  Espace-Dev - Philippe Rouet ( Ingénieur d'étude )
15, avenue René Cassin , Saint-Denis , Université de la Réunion , 97744 , France
 
 

Overviews

overview overview
apercu_coastal-station-TC.jpg

Spatial extent

N
S
E
W
thumbnail


Keywords

BD ORTHO® Dynalit Elevation Reefal beach SNO "Traît de côte", littoral management

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