Bathymetry - Revision history

Davidbrito: /* Overview */

2014-04-29T08:45:33Z

‎Overview

2013-12-16T18:26:45Z

2013-12-16T18:25:34Z

‎Refining the grid of the bathymetry

2013-12-16T18:25:13Z

‎Refining the grid of the bathymetry

2013-12-16T18:25:03Z

‎Refining the grid of the bathymetry

2013-12-16T18:23:45Z

‎Refining the grid of the bathymetry

2013-12-16T18:22:40Z

‎Refining the grid of the bathymetry

2013-12-16T18:21:38Z

‎Refining the grid of the bathymetry

2013-12-16T18:21:23Z

2010-10-04T16:07:59Z

‎Bathymetric data

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 == Overview ==
-A Mohid Water bathymetry file is a [[Grid Data]] file with information on the horizontal grid (geographical positioning, grid size, grid rotation, etc) and the bathymetry values to be used by the model. Bathymetry values are positive in MOHID, intertidal areas normally have negative values (depending on the referential being used) and land grid cells have a default value of -99.
+A Mohid Water bathymetry file is a [[Grid Data]] file with information on the horizontal grid (geographical positioning, grid size, grid rotation, etc) and the bathymetry values to be used by the model. Bathymetry values are generally positive and intertidal areas normally have negative values (depending on the referential being used - normally is hydrographic zero) and land grid cells have a default value of -99.
 == Generating a new bathymetry file ==

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 === Converting data to MOHID format ===
 The files with raw information must be converted to MOHID format so that they can be recognised by Mohid GIS and Digital Terrain Creator. MOHID has a simple support tool able to convert data from recognised sources (mentioned above) called [[ConvertToXYZ]].
 [[Category:Input Data Formats]]

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 *Create a refined grid.
 *Extract original bathymetry data to XYZ with MOHID GIS:
-[[Image:ExportGridDataAsXYZ.png|300px|thumb|left| Export Grid Data as XYZ]]
+[[Image:ExportGridDataAsXYZ.png|300px|thumb|center| Export Grid Data as XYZ]]
 *Use the XYZ as input to the new refined grid

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 *Extract original bathymetry data to XYZ with MOHID GIS:
 [[Image:ExportGridDataAsXYZ.png|300px|thumb|left| Export Grid Data as XYZ]]
 *Use the XYZ as input to the new refined grid

@@ Line 34: / Line 34: @@
 *Create a refined grid.
 *Extract original bathymetry data to XYZ with MOHID GIS:
-[[Image:ExportGridDataAsXYZ.png|300px|thumb|center| Export Grid Data as XYZ]]
+[[Image:ExportGridDataAsXYZ.png|300px|thumb|left| Export Grid Data as XYZ]]
 *Use the XYZ as input to the new refined grid

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 ==== Bathymetric data ====
-[http://www.bodc.ac.uk/projects/international/gebco/ General Bathymetric Chart of the Oceans (GEBCO)] - In this website data can be downloaded, once registered, bathymetries of any place of the World with a 1´x1´ resolution. However, it has to be considered, that these data are not very reliable for coastal areas. In 2009, they released an updated version of their 30'' GEBDO - grid which also includes satellite data. A description of both products can be found here [http://www.gebco.net/data_and_products/gridded_bathymetry_data/].
+[http://www.bodc.ac.uk/projects/international/gebco/ General Bathymetric Chart of the Oceans (GEBCO)] - In this website data can be downloaded, once registered, bathymetries of any place of the World with a 1´x1´ resolution. However, it has to be considered, that these data are not very reliable for coastal areas. In 2009, they released an updated version of their 30 minute GEBCO - grid which also includes satellite data. A description of both products can be found here [http://www.gebco.net/data_and_products/gridded_bathymetry_data/].
 Note: this data has to be processed in order to fulfill the [[XYZ points]] format.