Seabed Habitat (Habitat Directive) - FR5302008 'Roches de PenmarcÔÇÖh' - FR004031
Mapping of the Natura 2000 site « Roches de Penmarc'h » was jointly performed in the framework of two different actions: (i) the Natura 2000 convention for Brittany and (ii) the Interreg Area MeshAtlantic Project.
It is based on the interpretation of various types of data from a number of surveys carried out between 2011-2012 both in the intertidal and subtidal zones. Additionally the seabed « Carte G » from the French hydrographic survey (SHOM) was used in the interpretation process.
In the tidal zone the identification was made by interpreting coastal ortho-photographs from BD Ortho (2005 et 2009) and digitising them on scale 1 : 2000ème with further qualification of the polygons based on ground truth data.
For the subtidal zone, several data sources from 2011 were available: bathymetric lidar (with sounding density about 1pt*3m-2), single beam sounder on sonar and video transects, side scan sonar (resolution of about 0.2m), underwater video, grab sediment and fauna samples. In the outer rocky circalittoral zone, side scan sonar corridors were surveyed with a coverage of 30-50% depending on places. In the offshore circalittoral zone (known as La Grande vasière) where soft sediment is predominant, side scan sonar coverage was reduced to about 5-10%. In these latter two circalittoral zones, interpolation between sonar corridors was supported by SHOM « Carte G » (approx. scale 1 : 100 000) along with a 100m resolution depth DTM. On rocky seabed, exposure at the seabed was described using kinetic energy from a combination of wave and current hydrodynamic models according to the methods described in: http://doi.org/10.13155/49975
Rocky substrate in intertidal and infralittoral zones was derived from the combined interpretation of both the topographic and bathymetric Lidar DTMs and aerial photographs, where permitted by water transparency. Various representations of the DTMs (slope, hillshade) helped delineate rocky outcrops with good reliability.
Biological qualification of the substrate polygons was made through taxonomic analysis of benthos samples collected by MNHN in the framework of the project ┬½ Ecological assessment of Natura 2000 site ┬½ Roches de PenmarcÔÇÖh ┬╗.
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Alternate title | FR004031 |
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Date | 2017-05-01T12:00:00 |
Date type | Publication: Date identifies when the resource was issued |
Unique resource identifier | Seabed Habitat (Habitat Directive) - FR5302008 'Roches de PenmarcÔÇÖh' - FR004031 |
Credit | Besson E., Lamarche S. & Bajjouk T., 2012. Carte d'habitats benthiques intertidaux du site Natura 2000 des Roches de PenmarcÔÇÖh. 15p. |
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Credit | Lamarche S. & Populus J., 2012. Carte de nature des fonds du site Natura 2000 en mer des Roches de Penmarc'h. 23p. |
Credit | Dor├® A., 2012. Cartographie et ├®valuation de lÔÇÖ├®tat de conservation des habitats benthiques du site Natura 2000 des Roches de PenmarcÔÇÖh - Volet biologique. Rapport SPN 2012/ 35, MNHN, Paris, 102p. |
Status | Completed: Production of the data has been completed |
Point of contact
Individual name | Touria Bajjouk |
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Organisation name | Ifremer |
Electronic mail address | Touria.Bajjouk@ifremer.fr |
Role | Originator: Party who created the resource |
Point of contact
Individual name | Anouar Hamdi |
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Organisation name | Hamdi Entrepreneur |
Electronic mail address | anouarhamdi76@gmail.com |
Role | Originator: Party who created the resource |
Point of contact
Individual name | Steven Lamarche |
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Organisation name | Ifremer |
Electronic mail address | Stevenn.Laffarge@ifremer.fr |
Role | Originator: Party who created the resource |
Point of contact
Individual name | Antony Dor├® |
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Organisation name | MNHN |
Electronic mail address | adore@mnhn.fr |
Role | Originator: Party who created the resource |
Point of contact
Individual name | Fabrice Pluquet |
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Organisation name | ACRI-HE |
Electronic mail address | fabrice.pluquet@ acri-he.fr |
Role | Originator: Party who created the resource |
Descriptive keywords
GEMET - INSPIRE themes, version 1.0 | |
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GDI-Vlaanderen Trefwoorden | Metadata GDI-Vl-conform |
Other keywords | Habitat map |
Other keywords |
CARTHAM
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Natura 2000
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Other keywords |
FR5302008
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Penmarc'h
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Other keywords | Habitat Directive |
Spatial representation type | Vector: Vector data is used to represent geographic data |
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Spatial resolution
Denominator | 5000 |
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Language | English |
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Character set | UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 |
Topic category code |
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Reference System Information
Unique resource identifier | 4326 |
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Codespace | EPSG |
Hierarchy level | Dataset: Information applies to the dataset |
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Lineage
Statement | This map was made from historical data (cartes G, SHOM) and digital data heads-up interpretation (bathymetry, groundtruth point data, video, aerial photography). In April 2021, Ifremer converted the dataset into EMODnet standard and uploaded it on EMODnet portal. |
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Distribution format | ESRI Shapefile (Version: 1.0) | ||||||||||||||||||||||||||||
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File identifier | 7722404c-dc0c-42cb-9a8b-632a92e9596f | ||||||||
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Metadata language | English | ||||||||
Character set | UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 | ||||||||
Hierarchy level | Dataset: Information applies to the dataset | ||||||||
Date stamp | 2021-12-20T10:26:57 | ||||||||
Metadata standard name | ISO 19115:2003/19139 | ||||||||
Metadata standard version | 1.0 | ||||||||
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Overviews
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Associated resources
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