353_291002-Catalan Margin
Composite DTM of Catalan margin at approximately 250m of resolution
What
Metadata details
- File identifier
- SDN_CPRD_353_291002
- Catalogue type
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Composite Product Record
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Project name
-
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EMODNet Hydrography
-
- Dissemination level
-
public
- Metadata language
- English
- Date stamp
- 2018-01-29T16:31:26
Identification
- Dataset name
-
353_291002-Catalan Margin
- Short name of dataset (SDN Local Product-ID)
-
291002
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Parameter Discovery Vocabulary (P02)
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Bathymetry and Elevation
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SeaDataNet device categories
-
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multi-beam echosounders
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SeaDataNet device categories
-
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Differential Global Positioning System receivers
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Geometry
- Spatial representation type
- Grid
- Pixel size
- 0.0027 Degrees north (degree_north)
- Maximum scale of use
- 200000
Abstract
- Dataset description abstract
-
Composite DTM of Catalan margin at approximately 250m of resolution
- Description of processed data sources
-
Description of processed data sources :
This DTM has been elaborated from two grids (ArcGis raster format), both treated with the IDW method
The first is a grid of 25 x 25 meters of resolution derived from a SIMRAD 1000 MBES survey with information about continental shelf and slope.
The depths are between 5 and 160 meters. The vertical datum is Sea Level. This information has been obtained in the ESPACE project. Spanish Institute of Oceanography.Positioning .
The second is a grid of 100 x 100 meters of resolution derived from a SIMRAD MBES survey with information for depths between 5 and 2800 meters. The Vertical datum "Sea Level". This information has been obtained for the University of Cataluña.
- Description of data processing
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Description of data processing :
Source data received from data owners were DTM in GRID format (raster format ArcGis, structured in a matrix regular bathymetry associated with the centre of the cell of two types of format (raster format of ArcGis) with different resolutions. From each grid, we obtained a point SHAPE file, each point corresponds to the centre of the cell on the grid. Each point has the depth value of each cell. With each point SHAPE file, we use de command IDW (ArcGis) to realize an IDW Interpolation, (assigning weight in function of inverse of the distance). We have worked with the number of points that produced less error, in each case.Finally a single DTM for this zone was created with the MOSAIC command of ArcGis, in this case never these grids are intersecting between them; the grids are adjacent with a small zone of intersection to avoid the appearance of holes.
- Processing software
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ArcGIS/IDW
Quality
Accuracy / Calibration
Hor. accuracy
- Measure description
-
Not specified
- Evaluation method description
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In all case, multiple tests have been made in order to use the method which would introduce less error in the result.
Vert. accuracy
- Measure description
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Not specified
- Evaluation method description
-
In all case, multiple tests have been made in order to use the method which would introduce less error in the result.
Suitability
- Suitability, Expected type of users / uses and limitations
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Not for navigation
Quality Indicators
- Horizontal Quality Indicator
- 1 - Between 500m and 50m
- Vertical Quality Indicator
- 1 - SBES low frequency, SDB (similar than 2+5%d)
- Purpose Quality Indicator
- 2 - Bathymetric/morphologic survey
Where
- Min. depth in meters (>0 below Sea Level)
- 0
- Max. depth in meters (>0 below Sea Level)
- 2890
Projection
- code
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WGS 84 (EPSG:4326)
- Version or custom projection details
-
7.4
When
Creation date
Revision date
Temporal extent*
- Begin
- 1994-04-01T12:00:00
- End
- 2004-11-01T12:00:00
Who
Originator
- Organisation name
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Istituto Espanol de Oceanografia (IEO)
Data Holding Center
- Organisation name
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Istituto Espanol de Oceanografia (IEO)
Collating Centre = Metadata author
- Organisation name
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Istituto Espanol de Oceanografia (IEO)
Access
Distributor
- Organisation name
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Istituto Espanol de Oceanografia (IEO)
Data formats*
- Format
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ESRI GRD
- Version
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not specified
- OnLine resource
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Protocol Linkage Name WWW:LINK
http://www.ieo.es/ Web site of the Istituto Espanol de Oceanografia (IEO)
Intellectual property
- Access constraints
- Restricted
- Use constraints
- Copyright
- Other constraints
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Contact ideo@ieo.es