NetCDF unstructured grid with subgrid - Revision history

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2022-10-21T09:30:23Z

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← Older revision		Revision as of 09:30, 21 October 2022
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	A grid made out of arbitrary faces (triangles, quadrilaterals) is described. A topographic subgrid is available in addition to the computational grid.		A grid made out of arbitrary faces (triangles, quadrilaterals) is described. A topographic subgrid is available in addition to the computational grid.
	Typical file types are e.g. [[UNTRIM_GRID.DAT\|untrim_grid.dat]] as well as [[UTRSUB_GRID.DAT\|utrsub_grid.dat]]. Storage of grid		Typical file types are e.g. [[UNTRIM_GRID.DAT\|untrim_grid.dat]] as well as [[UTRSUB_GRID.DAT\|utrsub_grid.dat]]. Storage of grid
	related data, e. g. bathymetry or water level, is described elsewhere (see [[NetCDF synoptic data for unstructured grid with subgrid]]).		related data, e. g. bathymetry or [[water level]], is described elsewhere (see [[NetCDF synoptic data for unstructured grid with subgrid]]).
	Furthermore no information on open or closed edges, boundary conditions etc. is given here. The following		Furthermore no information on open or closed edges, boundary conditions etc. is given here. The following
	description is concentrating solely on grid structure (topology).		description is concentrating solely on grid structure (topology).
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	Comment:		Comment:
	# Plot-subedges and plot-subfaces (-subpolygons) are mainly used for visualization purposes.		# Plot-subedges and plot-subfaces (-subpolygons) are mainly used for visualization purposes.
	# The numerical model [[UNTRIM2]] uses exclusively subface as well as subedge depth classes (not presented here).		# The numerical [[model]] [[UNTRIM2]] uses exclusively subface as well as subedge depth classes (not presented here).
	# The total number of plot-subfaces and plot-subedges may be equal or larger than the respective number of depth classes.		# The total number of plot-subfaces and plot-subedges may be equal or larger than the respective number of depth classes.

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	: SubMesh2_edge_x:name_id = 1650 ;		: SubMesh2_edge_x:name_id = 1650 ;
	: SubMesh2_edge_x:bounds = "SubMesh2_edge_x_bnd" ;		: SubMesh2_edge_x:bounds = "SubMesh2_edge_x_bnd" ;
	: SubMesh2_edge_x:standard_name = "~~projection_x_coordinate~~" ;		: SubMesh2_edge_x:standard_name = "[[projection]]_x_coordinate" ;

	double SubMesh2_edge_y(nSubMesh2_edge) ;		double SubMesh2_edge_y(nSubMesh2_edge) ;
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	: SubMesh2_edge_y:name_id = 1651 ;		: SubMesh2_edge_y:name_id = 1651 ;
	: SubMesh2_edge_y:bounds = "SubMesh2_edge_y_bnd" ;		: SubMesh2_edge_y:bounds = "SubMesh2_edge_y_bnd" ;
	: SubMesh2_edge_y:standard_name = "~~projection_y_coordinate~~" ;		: SubMesh2_edge_y:standard_name = "[[projection]]_y_coordinate" ;

	Comment:		Comment:
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	: SubMesh2_face_x:name_id = 1650 ;		: SubMesh2_face_x:name_id = 1650 ;
	: SubMesh2_face_x:bounds = "SubMesh2_face_x_bnd" ;		: SubMesh2_face_x:bounds = "SubMesh2_face_x_bnd" ;
	: SubMesh2_face_x:standard_name = "~~projection_x_coordinate~~" ;		: SubMesh2_face_x:standard_name = "[[projection]]_x_coordinate" ;

	double SubMesh2_face_y(nSubMesh2_face) ;		double SubMesh2_face_y(nSubMesh2_face) ;
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	: SubMesh2_face_y:name_id = 1651 ;		: SubMesh2_face_y:name_id = 1651 ;
	: SubMesh2_face_y:bounds = "SubMesh2_face_y_bnd" ;		: SubMesh2_face_y:bounds = "SubMesh2_face_y_bnd" ;
	: SubMesh2_face_y:standard_name = "~~projection_y_coordinate~~" ;		: SubMesh2_face_y:standard_name = "[[projection]]_y_coordinate" ;

	Comment:		Comment:
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	: SubMesh2_edge_contact:<font color=darkorange>contact_meshes</font> = "SubMesh2 Mesh2" ;		: SubMesh2_edge_contact:<font color=darkorange>contact_meshes</font> = "SubMesh2 Mesh2" ;
	: SubMesh2_edge_contact:<font color=darkorange>contact_type</font> = "edge edge" ;		: SubMesh2_edge_contact:<font color=darkorange>contact_type</font> = "edge edge" ;
	: SubMesh2_edge_contact:~~start_index~~ = 0 ;		: SubMesh2_edge_contact:start_[[index]] = 0 ;

	Comment:		Comment:
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	: SubMesh2_face_contact:<font color=darkorange>contact_meshes</font> = "SubMesh2 Mesh2" ;		: SubMesh2_face_contact:<font color=darkorange>contact_meshes</font> = "SubMesh2 Mesh2" ;
	: SubMesh2_face_contact:<font color=darkorange>contact_type</font> = "face face" ;		: SubMesh2_face_contact:<font color=darkorange>contact_type</font> = "face face" ;
	: SubMesh2_face_contact:~~start_index~~ = 0 ;		: SubMesh2_face_contact:start_[[index]] = 0 ;

	Comment:		Comment:

imported>Lang Guenther: /* Combined grid */ Typo

2016-04-18T13:02:41Z

Combined grid: Typo

← Older revision		Revision as of 13:02, 18 April 2016
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	The two grids - computational grid plus subgrid - are part of the combined grid or ''parent mesh''. In this context additional		The two grids - computational grid plus subgrid - are part of the combined grid or ''parent mesh''. In this context additional
	contact variables are required. They describe the relationship or ~~cennectivity~~ between the two grids. This concept (''parent mesh'',		contact variables are required. They describe the relationship or connectivity between the two grids. This concept (''parent mesh'',
	''contact variables'') is esentially based on ideas worked out by '''Bert Jagers''' (Deltares) (see		''contact variables'') is esentially based on ideas worked out by '''Bert Jagers''' (Deltares) (see
	[https://publicwiki.deltares.nl/display/NETCDF/netCDF ''Deltares Conventions'']).		[https://publicwiki.deltares.nl/display/NETCDF/netCDF ''Deltares Conventions'']).

imported>Lang Guenther: /* Contact lists */ typo

2016-04-15T14:41:58Z

Contact lists: typo

← Older revision		Revision as of 14:41, 15 April 2016
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	Contact lists describe the inter-relation between the different components (child meshes) of the ''parent mesh''. In this		Contact lists describe the inter-relation between the different components (child meshes) of the ''parent mesh''. In this
	example they are used to describe all connexions between computational grid and subgrid.		example they are used to describe all connexions between computational grid and subgrid.


	===Contact list plot-subedges <-> edges===		===Contact list plot-subedges <-> edges===
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	Comment:		Comment:
	# The ''~~Mesh Topology Contact~~'' concept is so far not supported by the [http://ugrid-conventions.github.io/ugrid-conventions/ ''UGRID Conventions''].		# The ''mesh topology contact'' concept is so far not supported by the [http://ugrid-conventions.github.io/ugrid-conventions/ ''UGRID Conventions''].
	# Indices start with zero..		# Indices start with zero..
	# Each plot-subedge refers to an edge in the computational grid.		# Each plot-subedge refers to an edge in the computational grid.
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	Comment:		Comment:
	# The ''~~Mesh Topology Contact~~'' concept is so far not supported by the [http://ugrid-conventions.github.io/ugrid-conventions/ ''UGRID Conventions''].		# The ''mesh topology contact'' concept is so far not supported by the [http://ugrid-conventions.github.io/ugrid-conventions/ ''UGRID Conventions''].
	# Indices start with zero..		# Indices start with zero..
	# Each plot-subface refers to a face in the computational grid.		# Each plot-subface refers to a face in the computational grid.

imported>Lang Guenther: /* Grid with subgrid */ typo

2016-04-15T14:39:24Z

Grid with subgrid: typo

← Older revision		Revision as of 14:39, 15 April 2016
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	Hinweise:		Hinweise:
	# Other topological data are not available for the submesh..		# Other topological data are not available for the submesh.
	# This variable is ''not'' compliant with [http://ugrid-conventions.github.io/ugrid-conventions/ ''UGRID Conventions''], because the subgrid requires no connectivity tables.		# This variable is ''not'' compliant with [http://ugrid-conventions.github.io/ugrid-conventions/ ''UGRID Conventions''], because the subgrid requires no connectivity tables.
	# Attribute "parent_mesh" refers to the combined mesh (''~~Parent Mesh~~''): The subgrid is the second part of the ''parent mesh''.		# Attribute "parent_mesh" refers to the combined mesh (''parent mesh''). The subgrid is the second part of the ''parent mesh''.

	===Combined grid===		===Combined grid===

imported>Lang Guenther: /* Computational grid */ typo

2016-04-15T14:37:39Z

Computational grid: typo

← Older revision		Revision as of 14:37, 15 April 2016
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	# Not all connectivities must be available because some of them contain redundant information. But be friendly to the end-user and provide as much information as possible.		# Not all connectivities must be available because some of them contain redundant information. But be friendly to the end-user and provide as much information as possible.
	# Attributes ''face_dimension'' and ''edge_dimension'' from [http://ugrid-conventions.github.io/ugrid-conventions/#2d-flexible-mesh-mixed-triangles-quadrilaterals-etc-topology ''2D flexible mesh (mixed triangles, quadrilaterals, etc.) topology''] are not supported by BAW. These are required only in case the dimension ordering is nonstandard in any of the connectivity variables for faces and edges, respectively.		# Attributes ''face_dimension'' and ''edge_dimension'' from [http://ugrid-conventions.github.io/ugrid-conventions/#2d-flexible-mesh-mixed-triangles-quadrilaterals-etc-topology ''2D flexible mesh (mixed triangles, quadrilaterals, etc.) topology''] are not supported by BAW. These are required only in case the dimension ordering is nonstandard in any of the connectivity variables for faces and edges, respectively.
	# Attribute "parent_mesh" refers to the combined mesh (''~~Parent Mesh~~''): The computational mesh is the first part of the ''parent mesh''.		# Attribute "parent_mesh" refers to the combined mesh (''parent mesh''). The computational mesh is the first part of the ''parent mesh''.

	===Grid with subgrid===		===Grid with subgrid===

imported>Lang Guenther: /* Connectivities */ translated from German to English

2016-04-15T14:36:43Z

Connectivities: translated from German to English

← Older revision		Revision as of 14:36, 15 April 2016
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	===Computational grid===		===Computational grid===

	~~Die Konnektivitäts-Listen des Berechnungsgitters stimmen mit derjenigen eines unstrukturierten Gitters ohne SubGrid überein~~.		Connectivity tables for the computational grid are identical to those used for an unstructured grid without subgrid.
	~~Siehe~~ [[NetCDF ~~Unstrukturiertes Gitter~~#~~Topologische Daten~~\|NetCDF ~~Unstrukturiertes Gitter unter~~ "~~Topologische Daten~~"]].		See [[NetCDF unstructured grid#Connectivities\|NetCDF unstructured grid "Connectivities"]].

	===Grid with subgrid===		===Grid with subgrid===

	~~Für das SubGrid werden~~ ''~~keine~~'' ~~Konnektivitäts~~-~~Listen benötigt, da Nachbarschaftsbeziehungen keine Rolle spielen~~.		The subgrid does ''not'' require any connectivity table. Inter-relation between neighbors is not required at all.

	==Topology==		==Topology==

imported>Lang Guenther: /* Bounds for faces (Polygone) */ typo

2016-04-15T14:31:46Z

Bounds for faces (Polygone): typo

← Older revision		Revision as of 14:31, 15 April 2016
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	Comment:		Comment:
	# Coordinates of (sub-) faces (sub-polygons) must be prescribed in counter-clockwise orientation.		# Coordinates of (sub-) faces (sub-polygons) must be prescribed in counter-clockwise orientation.
	# Invalid coordinates are allowed to be present in the last position(s) in case there are less than ~~nMaxMesh2_face_nodes~~ nodes in a face.		# Invalid coordinates are allowed to be present in the last position(s) in case there are less than nMaxSubMesh2_face_nodes nodes in a face.

	==Connectivities==		==Connectivities==

imported>Lang Guenther: /* Geographic coordinates */ Link corrected

2016-04-15T14:30:50Z

Geographic coordinates: Link corrected

← Older revision		Revision as of 14:30, 15 April 2016
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	The definition for the geographic coordinates of the computational grid is identical to the description given for an unstructured		The definition for the geographic coordinates of the computational grid is identical to the description given for an unstructured
	computational grid without subgrid details. See [[~~http://wiki.baw.de/en/index.php5/NetCDF_unstructured_grid~~#~~Geographic_coordinates~~\|NetCDF unstructured grid "geographic coordinates"]].		computational grid without subgrid details. See [[NetCDF unstructured grid#Geographic coordinates\|NetCDF unstructured grid "geographic coordinates"]].

	==Geographic coordinates of the plot-subgrid==		==Geographic coordinates of the plot-subgrid==

imported>Lang Guenther: /* Bounds for faces (polygons) */ typo

2016-04-15T14:29:22Z

Bounds for faces (polygons): typo

← Older revision		Revision as of 14:29, 15 April 2016
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	Comment:		Comment:
	# Coordinates of (sub-) faces (sub-polygons) must be prescribed in counter-clockwise orientation.		# Coordinates of (sub-) faces (sub-polygons) must be prescribed in counter-clockwise orientation.
	# Invalid coordinates are allowed to be present in the last position(s) in case there are less than ~~nMaxMesh2_face_nodes~~ nodes in a face.		# Invalid coordinates are allowed to be present in the last position(s) in case there are less than nMaxSubMesh2_face_nodes nodes in a face.

	==Geographic coordinates==		==Geographic coordinates==

imported>Lang Guenther: /* Local coordinates */ Link corrected

2016-04-15T14:27:17Z

Local coordinates: Link corrected

← Older revision		Revision as of 14:27, 15 April 2016
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	The definition for the local coordinates of the computational grid is identical to the description given for an unstructured		The definition for the local coordinates of the computational grid is identical to the description given for an unstructured
	computational grid without subgrid details. See [[~~http://wiki.baw.de/en/index.php5/NetCDF_unstructured_grid~~#~~Local_coordinates~~\|NetCDF unstructured grid "local coordinates"]].		computational grid without subgrid details. See [[NetCDF unstructured grid#Local coordinates\|NetCDF unstructured grid "local coordinates"]].

	==Local coordinates of the plot-subgrid==		==Local coordinates of the plot-subgrid==