NetCDF Profile

Kurze Beschreibung

Es wird die Lage mehrerer Profile beschrieben.

Inhalt der Datei

Dimensionen

dimensions:

nMesh1_node = number of nodes ;

nMesh1_edge = number of edges ;

nMesh1_prof = number of profiles ;

nMaxMesh1_prof_edges = maximum number of edges along a profile ;

Two = 2 ; \\ constant dimension

Lokale Koordinaten

Knoten

double Mesh1_node_x(nMesh1_node) ;

Mesh1_node_x:standard_name = "projection_x_coordinate" ;

Mesh1_node_x:long_name = "x-coordinate of 1D network node" ;

Mesh1_node_x:units = "m" ;

double Mesh1_node_y(nMesh1_node) ;

Mesh1_node_y:standard_name = "projection_y_coordinate" ;

Mesh1_node_y:long_name = "y-coordinate of 1D network node" ;

Mesh1_node_y:units = "m" ;

Kanten

double Mesh1_edge_x(nMesh1_edge) ;

Mesh1_edge_x:standard_name = "projection_x_coordinate" ;

Mesh1_edge_x:long_name = "x-coordinate of 1D network edge, e.g. center of egde" ;

Mesh1_edge_x:units = "m" ;

double Mesh1_edge_y(nMesh0_edge) ;

Mesh1_edge_y:standard_name = "projection_y_coordinate" ;

Mesh1_edge_y:long_name = "y-coordinate of 1D network edge, e.g. center of edge" ;

Mesh1_edge_y:units = "m" ;

(optional) Begrenzung für Kanten

double Mesh1_edge_x_bnd(nMesh1_edge,Two) ; \\ no metadata required

double Mesh1_edge_y_bnd(nMesh1_edge,Two) ; \\ no metadata required

Geografische Koordinaten

Knoten

double Mesh1_node_lon(nMesh1_node) ;

Mesh1_node_lon:standard_name = "longitude" ;

Mesh1_node_lon:long_name = "longitude of 1D network node" ;

Mesh1_node_lon:units = "degrees_east" ;

double Mesh1_node_lat(nMesh1_node) ;

Mesh1_node_lat:standard_name = "latitude" ;

Mesh1_node_lat:long_name = "latitude of 1D network node" ;

Mesh1_node_lat:units = "degrees_north" ;

Kanten

double Mesh1_edge_lon(nMesh1_edge) ;

Mesh1_edge_lon:standard_name = "longitude" ;

Mesh1_edge_lon:long_name = "longitude of 1D network edge, e.g. center of edge" ;

Mesh1_edge_lon:units = "degrees_east" ;

double Mesh1_edge_lat(nMesh1_edge) ;

Mesh1_edge_lat:standard_name = "latitude" ;

Mesh1_edge_lat:long_name = "latitude of 1D network edge, e.g. center of edge" ;

Mesh1_edge_lat:units = "degrees_north" ;

(optional) Begrenzung für Kanten

double Mesh1_edge_lon_bnd(nMesh1_edge,Two) ; \\ no metadata required

double Mesh1_edge_lat_bnd(nMesh1_edge,Two) ; \\ no metadata required

Topologische Daten

Knotenverzeichnis der Kanten

integer Mesh1_edge_nodes(nMesh1_edge,Two) ;

Mesh1_edge_nodes:standard_name = "???" ; \\ yet to be determined

Mesh1_edge_nodes:long_name = "list of nodes for all edges, start node - end node" ;

Bemerkung: Indizes starten mit Null!

Kantenverzeichnis der Profile

integer Mesh1_prof_edges(nMesh1_prof,nMaxMesh1_prof_edges) ;

Mesh1_prof_edges:standard_name = "???" ; \\ yet to be determined

Mesh1_prof_edges:long_name = "list of edges for all profiles" ;

Mesh1_prof_edges:_FillValue = fillvalue ; \\ indicates missing edges

Bemerkung: Indizes starten mit Null!

Hinweise:

1. Kann dazu genutzt werden, mehrere zusammenhängende Profile, z. B. Längs- und Querprofile, zu deklarieren.
2. Einzelne Kanten dürfen mehrfach in (verschiedenen) Listen auftauchen.
3. Bei stark unterschiedlichen Profillängen ggf. NetCDF Kompression von Daten durch Aufsammeln nutzen.

Topologievariable

integer Mesh1 ;

Mesh1:standard_name = "???" ; \\ yet to be determined

Mesh1:long_name = "name of (profile) grid can be stored here" ;

Mesh1:dimensionality = 1 ; \\ network

Mesh1:locations = "node edge" ;

Mesh1:node_coordinates = "Mesh1_node_lon Mesh1_node_lat" ;

Mesh1:edge_coordinates = "Mesh1_edge_lon Mesh1_node_lat" ;

Mesh1:poly_coordinates = "" ;

Mesh1:edge_node_connectivity = "Mesh1_edge_nodes" ;

Mesh1:poly_node_connectivity = "" ;

Mesh1:edge_poly_connectivity = "" ;

Mesh1:prof_edge_connectivity = "Mesh1_prof_edges" ;

Koordinatentransformation

Siehe unter NetCDF Grid Mapping Variable.

Anmerkungen, Fragen

• Datei nutzt Deltares-CF-Erweiterungen. Ausnahme ist das Attribut edge_poly_cennectivity in der Topologievariable. Ferner die Neuerfindung prof_edge_connectivity zur vereinfachten Deklaration zusammenhängender Profile.
• Die Beschreibung der Koordinatentransformation ist für UTM- und Gauß-Krüger-Koordinaten geeignet.

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