Porsmilin profiles
Beach profiling using RTK-GNSS (survey method GPS) represents one of the most convenient method for frequent resurveys. Since 2003, profile surveys have been (approx.) weekly for the first year, fortnightly between January 2004 and June 2005, and near-monthly thereafter, with occasional gaps in the data due to equipment misfunctioning and maintenance. Trimble 5700/5800 and Topcon Hiper V GPS systems were used for data acquisition.
Simple
- Date (Publication)
- 2021-03-11
- Citation identifier
- https://portail.indigeo.fr/geonetwork/srv/metadata/aca4e22e-eb10-45c5-9212-a78e8277a851
- Credit
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UMR 6538 LGO - UMR 6554 LETG
- Status
- Completed
- Point of contact
-
Organisation name Individual name Electronic mail address Role UMR 6538 LGO
Bertin Stéphane
Author UMR 6538 LGO
Floc'h France
Author UMR 6538 LGO
Le Dantec Nicolas
Author UMS 3113
Jaud Marion
Author UMR 6538 LGO
Cancouët Romain
Author UMR 6538 LGO
Franzetti Marcaurelio
Author UMR 6554 LETG
Cuq Véronique
Author UMR 6538 LGO
Prunier Christophe
Author UMR 6538 LGO
Ammann Jérôme
Author UMR 6538 LGO
Augereau Emmanuel
Author UMR 6538 LGO
Lamarche Stevenn
Author UMR 6554 LETG
Belleney Déborah
Author UMR 6554 LETG
Rouan Mathias
Author UMR 6554 LETG
David Laurence
Author UMR 6538 LGO
Deschamps Anne
Author UMR 6538 LGO
Delacourt Christophe
Author UMR 6554 LETG
Suanez Serge
Author
- Theme
-
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SNO DYNALIT
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Beach profile
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Digital Elevation Model
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Coastal monitoring
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Nearshore waves
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Astronomical tides
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Bathymetry
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Orthoimage
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- Place
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Brittany
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Finistere
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Porsmilin
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GEMET - INSPIRE themes, version 1.0
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Elevation
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Orthoimagery
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- Access constraints
- Other restrictions
- Other constraints
- No limitations to public access
- Use limitation
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Free use subject to mentioning the source (at least the name of the producer) and the date of its last update
- Use constraints
- Other restrictions
- Other constraints
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Supplier partner is not able to guarantee the accuracy, update, integrity, completeness of data and in particular that they are free of errors or inaccuracies, including location, identification or qualification. No warranty as to the fitness of the data for a particular purpose is made by the supplier partner. Users use the data under their full responsibility, without recourse against the supplier partner whose liability can be incurred due to damage resulting directly or indirectly from the use of this data. In particular, it is up to users to decide, on their own responsibility: the opportunity to use the data; File compatibility of their computer systems; adequacy of the data to their needs; that they have sufficient competence to use the data. The partner supplier is in no way responsible for external elements including data analysis tools, hardware, software, networks ... used to view and / or process data. The user ensures verify the timeliness of the information provided is compatible with the use of it.
- Spatial representation type
- Grid
- Spatial representation type
- Text, table
- Distance
- 0.5 m
- Language
- Français
- Character set
- UTF8
- Topic category
-
- Geoscientific information
![thumbnail](https://demo.georchestra.org/geonetwork/srv/api/regions/geom.png?geomsrs=EPSG:4326&geom=POLYGON((-4.6636%2048.3441,-4.6636%2048.3577,-4.6915%2048.3577,-4.6915%2048.3441,-4.6636%2048.3441)))
- Begin date
- 2003-01-08
- End date
- 2019-11-28
- Unique resource identifier
- RGF93 / Lambert-93 + NGF-IGN69 height (EPSG:5698)
- Distribution format
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Name Version Text
1.0
MATLAB
1.0
- OnLine resource
-
Protocol Linkage Name WWW:DOWNLOAD-1.0-http--download
https://portail.indigeo.fr/geonetwork/srv/api/records/aca4e22e-eb10-45c5-9212-a78e8277a851/attachments/Porsmilin_profiles.zip Porsmilin_profiles.zip
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--link
https://www.dynalit.fr/ SNO DYNALIT
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Explanation
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Article 7, paragraph 1, of Directive 2007/2 / EC corresponds to the technical procedures for interoperability: this is the regulation on interoperability: regulation n ° 1253/2013 of 21 October 2013 amending and supplementing Regulation n ° 1089/2010 of 23 November 2010
- Pass
- Yes
- Statement
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Profile surveys consists in measuring a central cross-shore profile line from the dune ridge down to the low-tide waterline using high-accuracy RTK-GNSS in rapid-static mode (10 s averaging at 10 Hz) using mobile GNSS units mounted on a pole equipped with a bubble level. The cross-shore spacing between survey points is adapted to the terrain morphology, ranging from near-continuous (i.e., approximately 0.1 m) where complex up to a few metres in linear and morphologically simple areas.
- Description
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To facilitate reuse of the data, profiles initially formatted as three-column x, y, z matrices were further processed to be expressed in terms of vertical elevation versus cross-shore distance from a common starting point (profile head) at a standard sampling rate of 0.5 m. This was done through linear interpolation onto the best-fit transect line determined by least-squares (y = 2.072 x + 6560.283, R2 = 0.99, n = 253). Profile head position is 132011.840 m East by 6833840.188 m North. Orientation of beach profiles is 205.763°, where 180° indicates South counted clockwise.
- Rationale
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Data processing
- Description
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Performed concurrently with profile surveys, measurement of survey marks enabled estimating georeferencing precision over the period 2003-2019. It shows precisions at one standard deviation of 0.012 m, 0.015 m and 0.035 m along x (east), y (north) and z (elevation) directions, respectively.
- Rationale
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Quality verification
- Description
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Profiles are provided as individual tabulation delimited text (.txt) files with two columns (chainage and elevation), with the following naming convention: yyyymmdd_Porsmilin_GPS_Dist_IGN69_0.5, where yyyymmdd is the survey date.
- Rationale
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Data naming and preparation
Metadata
- File identifier
- aca4e22e-eb10-45c5-9212-a78e8277a851 XML
- Metadata language
- Français
- Character set
- UTF8
- Parent identifier
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Ensemble de données issues de : séries d’observation long-terme de topographie et de bathymétrie de la plage de poche macrotidale de Porsmilin, France
74ecce0a-e650-4c41-9970-97e4602f1cd8
- Hierarchy level
- Dataset
- Hierarchy level name
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Parent
- Date stamp
- 2021-09-30T14:59:38
- Metadata standard name
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ISO 19115
- Metadata standard version
-
1.0
- Metadata author
-
Organisation name Individual name Electronic mail address Role UMR 6538 LGO
Bertin Stéphane
Point of contact
- Other language
-
Language Character encoding English UTF8 French UTF8
Overviews
![overview](https://portail.indigeo.fr/geonetwork/srv/api/records/aca4e22e-eb10-45c5-9212-a78e8277a851/attachments/Child1.jpg)
Spatial extent
![thumbnail](https://demo.georchestra.org/geonetwork/srv/api/regions/geom.png?geomsrs=EPSG:4326&geom=POLYGON((-4.6636%2048.3441,-4.6636%2048.3577,-4.6915%2048.3577,-4.6915%2048.3441,-4.6636%2048.3441)))
Provided by
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