|
GSI Metadata Zone 3 Bathymetric Grids |
Click Here to find out more about the Seabed Survey
Click Here to find out more about INFOMAR
Metadata Date: 01/7/2009
Last Date: 27/11/2006
Title: Zone 3 bathymetry
Description : Bathymetric ArcGIS Grids, generated from xyz multibeam data
Keywords: INSS, Bathymetry, Zone 3, INFOMAR
Version : V.2
Language : English
Data type : Raster
Originator org- Geological Survey of Ireland
Other contributors -
Technical contact details-
Contact Name: Grainne O'Shea
Organisation: Geological Survey of Ireland
Contact Address :
Marine and Geophysics Section,
Geological Survey of Ireland,
Beggar's Bush,
Haddington Road ,
Dublin 4
Contact Email : Grainne.NiShe@gsi.ie
Contact Phone : 016782764
Website Details :
http://www.infomar.ie/
Data Download: https://jetstream.gsi.ie/iwdds/index.html
Principle data capture Technique -
Data was collected during the INSS survey using Multibeam bathymetry and also the INFOMAR survey.
4.1 File name: merc_asci3, merc3b, merc_z3cdef2, merc_3g_all, merc_3h (file folders-Arc GIS grid)
Date: 16/10/2006
Originator Geological Survey of Ireland
Nature of change/update to data: bathymetric grids generated for zone3 A-H are created by converting ascii xyz data to raster data and projecting it into world mercator co-ordinates.
Methodology: Use of ArcGIS 9 tools to convert ascii data and to project it to Mercator Co-ords
Sources used as input data for the Change/Update: asciito_3a_d1, asc_r_z3b_dd1, asc_r_z3cdef, asc_r_3g_all, asc_r_3h
Scripts/tools used: ARCGIS 9, Data Management Tools, Projections and Transformations, Raster, Project, Raster, Output Co-ordinate systems, select, projected co-ordinate systems, World, Mercator (world).prj.
Contact details for further information on Scripts/Tools used:
Ronan O’Toole, The Marine Section, Geological Survey of Ireland, Beggars Bush, Haddington Road, Dublin 4.
4.2 File name: z3_merc_all (file folder-ArcGIS grid)
Date: 28/11/2006
Originator Geological Survey of Ireland
Nature of change/update to data: Data for each of the sections of Zone 3 was merged using the mosaic tool in ARCGIS, producing a new raster of the entire Zone 3 area in mercator co-ords
Methodology: Mercator Rasters merged in ArcGIS using mosaic tool.
Sources used as input data for the Change/Update: merc_asci3, merc3b, merc_z3cdef2, merc_3g_all, merc_3h
Scripts/tools used: ArcGIS, Data management tools, Raster, Mosaic to new Raster
Contact details for further information on Scripts/Tools used:
Ronan O’Toole, The Marine Section, Geological Survey of Ireland, Beggars Bush, Haddington Road, Dublin 4
4.3 File name: zone3_shd_rel (file folder-ArcGIS grid)
Date: 28/11/2006
Originator Geological Survey of Ireland
Nature of change/update to data: The Raster for Zone 3 in World Mercator Co-ordinates co-ordinates is projected into standard WGS 84 Co-ordinates, generating a new bathymetric grid for the entire Zone 3 area
Methodology: Existing Raster is projected to the new co-ordinate system using ARCGIS 9
Sources used as input data for the Change/Update: z3_merc_all (file folder-ArcGIS grid)
Scripts/tools used: ARCGIS 9, Data Management Tools, Projections and Transformations, Raster, Project, Raster, Output Co-ordinate systems, select, projected co-ordinate systems, Geographic, WGS 1984 (world).prj
Contact details for further information on Scripts/Tools used:
Ronan O’Toole, The Marine Section, Geological Survey of Ireland, Beggars Bush, Haddington Road, Dublin 4.
4.4 File name: by0609_800ing (ArcGIS grid)
Date: 01/07/2009
Originator Geological Survey of Ireland
Nature of change/update to data: Data from the INFOMAR survey has been added and the grid has been projected into Irish National Grid
Methodology: INFOMAR xyz data was gridded using Fledermaus. The resulting .dtm was exported to ArcGIS .asc format. This was converted to ArcGIS Grid and all Grids were merged using Spatial Analyst.
Sources used as input data for the Change/Update: z3_merc_all (file folder-ArcGIS grid)
Scripts/tools used: Fledermaus Average Gridder to create .dtm and DMagic to export .dtm. ARCGIS 9.3 with Spatial Analyst, ArcToolbox - Conversion - To Raster - ascii to Raster, ArcCatalog to set projection. Raster Calculator to merge grids.
Contact details for further information on Scripts/Tools used:
Grainne O'Shea, The Marine Section, Geological Survey of Ireland, Beggars Bush, Haddington Road, Dublin 4.
Authorised by : - Koen Verbruggen (Principal Geologist, Geological Survey of Ireland). Maintenance/ Update frequency- Updates will be carried out when new survey work is completed at least once a year.
Elevation: Depth from sea surface to seabed in meters
Reference system: World Mercator,WGS 84 & Irish National Grid
Spatial Extent: Irish designated waters
Additional extent:
Resolution: 800m Irish National Grid
Filename: by0609_800ing (ArcGIS grid)
Holder: The Marine Section, Geological Survey of Ireland
Distributor contract details :
Koen Verbruggen
Principal Geologist
Geological Survey of Ireland,
Beggar's Bush,
Haddington Road ,
Dublin 4
Storage Format: xyz, Fledermaus .dtm, ArcGIS Grid
Supply Format: ascii, .ers, ArcGIS .asc
Supply media : Available for download free from https://jetstream.gsi.ie/iwdds/index.html
File size: Variable
Copyright : Use of the data is constrained only by the GSI, GIS Data License Agreement.
Other Restrictions:
Spatial Accuracy: Variable. Original point bathy data is 100m horizontal resolutions. The accuracy improves in areas closer to shore.
Thematic Accuracy
n/a
Currency: Available
Logical Consistency: