Roches de Penmarc'h
Mapis 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 ┬½ 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 : 2000├¿me 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), side scan sonar (resolution of about 0.2m), underwater video, sediment and fauna samples collected with grabs and trawls. Addtionnally a single beam sounder was running at all times during the transects, which contributing to improve the depth DTM. In the outer rocky circalittoral zone, side scan sonar corridors were surveyed with a coverage of 30-50% depending on places. In the offshore deep circalittoral zone (known as La Grande vasi├¿re) 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 ┬½ Carte G ┬╗ (approx. scale 1:100000) 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"Ecological assessment of Natura 2000 site - Roches de PenmarcÔÇÖh".The final habitat classification was a synthesis of the main habitat classifications, namely: Generic habitats from the Habitat Directive (EUR 27), Elementary habitats from the French Cahiers dÔÇÖhabitats, The Rebent classificationand EUNIS level 4 as much as possible.
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Alternate title | FR003007 |
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Date | 2017-09-26 |
Date type | Publication: Date identifies when the resource was issued |
Unique resource identifier | f8e1fd69-f219-4237-bcd6-58c4e2bd07f7 |
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Resource constraints
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Point of contact
Individual name | Touria BAJJOUK |
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Organisation name | Ifremer |
Electronic mail address | tbajjouk@ifremer.fr |
Role | Point of contact: Party who can be contacted for acquiring knowledge about or acquisition of the resource |
Maintenance and update frequency | Unknown: Frequency of maintenance for the data is not known |
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Descriptive keywords
GEMET - INSPIRE themes, version 1.0 | |
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GDI-Vlaanderen Trefwoorden | Metadata GDI-Vl-conform |
Other keywords | Biological Environment, Habitats |
Other keywords | Downloadable Data |
Spatial representation type | Vector: Vector data is used to represent geographic data |
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Spatial resolution
Denominator | 100000 |
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Spatial resolution
Denominator | 200000 |
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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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Environment description | Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.0.3348 |
Reference System Information
Unique resource identifier | http://www.opengis.net/def/crs/EPSG/0/4258 |
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Codespace | EPSG |
Hierarchy level | Dataset: Information applies to the dataset |
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Lineage
Statement | 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. |
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Distribution format | Shapefile (Version: ArcGIS 10.2) | ||||||||||||||||||||||||||||
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File identifier | 7fe08dec-09a4-4fe7-b574-9fc8e6feb11f | ||||||||
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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 | ||||||||
Hierarchy level name | dataset | ||||||||
Date stamp | 2020-01-15T11:18:12Z | ||||||||
Metadata standard name | INSPIRE Metadata Implementing Rules: Technical Guidelines based on EN ISO 19115 and EN ISO 19119 | ||||||||
Metadata standard version | V. 1.2 | ||||||||
Contact
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