NetCDF Unstrukturiertes Gitter

Kurze Beschreibung

Unstrukturiertes Gitter.

Inhalt der Datei

Dimensionen

dimensions:

node = number of nodes (vertices) ;

edge = number of edges ;

poly = number of polygons (triangles, quadrilaterals) ;

max_poly_nodes = maximum number of nodes in polygon

Two = 2 ;

Variablen

Lokale Koordinaten

Knoten

double node_x(node) ;

node_x:standard_name = "projection_x_coordinate" ;

node_x:long_name = "x-coordinate of 2D mesh nodes" ;

node_x:units = "m" ;

double Mesh2_node_y(node) ;

node_y:standard_name = "projection_y_coordinate" ;

node_y:long_name = "y-coordinate of 2D mesh nodes" ;

node_y:units = "m" ;

Kanten

double edge_x(edge) ;

edge_x:standard_name = "projection_x_coordinate" ;

edge_x:long_name = "characteristic x-coordinate of 2D mesh edges, e.g. edge center" ;

edge_x:units = "m" ;

double edge_y(edge) ;

edge_y:standard_name = "projection_y_coordinate" ;

edge_y:long_name = "characteristic y-coordinate of 2D mesh edges, e.g. edge center" ;

edge_y:units = "m" ;

Polygone

double poly_x(poly) ;

poly_x:standard_name = "projection_x_coordinate" ;

poly_x:long_name = "characteristic x-coordinate of 2D mesh polygons, e.g. circumcenter" ;

poly_x:units = "m" ;

double poly_y(poly) ;

poly_y:standard_name = "projection_y_coordinate" ;

poly_y:long_name = "characteristic y-coordinate of 2D mesh polygons, e.g. circumcenter" ;

poly_y:units = "m" ;

Geografische Koordinaten

Knoten

double node_lon(node) ;

node_lon:standard_name = "longitude" ;

node_lon:long_name = "longitude of 2D mesh nodes" ;

node_lon:units = "degrees_east" ;

double node_lat(node) ;

node_lat:standard_name = "latitude" ;

node_lat:long_name = "latitude of 2D mesh nodes" ;

node_lat:units = "degrees_north" ;

Kanten

double edge_lon(edge) ;

edge_lon:standard_name = "longitude" ;

edge_lon:long_name = "characteristic longitude of 2D mesh edges, e.g. edge center" ;

edge_lon:units = "degrees_east" ;

edge_lon:bounds = "edge_lon_bnd" ;

double edge_lat(edge) ;

edge_lat:standard_name = "latitude" ;

edge_lat:long_name = "characteristic latitude of 2D mesh edges, e.g. edge center" ;

edge_lat:units = "degrees_north" ;

edge_lat:bounds = "edge_lon_bnd" ;

Polygone

double poly_lon(poly) ;

poly_lon:standard_name = "longitude" ;

poly_lon:long_name = "characteristic longitude of 2D mesh polygons, e.g. circumcenter" ;

poly_lon:units = "degrees_east" ;

poly_lon:bounds = "poly_lon_bnd"

double poly_lat(poly) ;

poly_lat:standard_name = "latitude" ;

poly_lat:long_name = "characteristic latitude of 2D mesh polygons, e.g. circumcenter" ;

poly_lat:units = "degrees_north" ;

poly_lat:bounds = "poly_lat_bnd" ;

Berandungen in geografischen Koordinaten

Kanten

double edge_lon_bnd(edge,two) ; \\ start and end longitude of edges

double edge_lat_bnd(edge,two) ; \\ start and end latitude of edges

Polygone

double poly_lon_bnd(edge,max_poly_nodes) ; \\ longitude of cell vertices

double_poly_lon_bnd:_FillValue = "fillvalue" \\ not all polys have max_poly_node vertices

double poly_lat_bnd(edge,max_poly_nodes) ; \\ latitude of cell vertices

double_poly_lat_bnd:_FillValue = "fillvalue" \\ not all polys have max_poly_node vertices

Tiefe

Knoten

double node_depth(node) ;

node_depth:standard_name = "sea_floor_depth_below_geoid" ;

node_depth:long_name = "sea floor depth of 2D mesh nodes" ;

node_depth:units = "m" ;

node_depth:coordinates = "Mesh2_node_lon Mesh2_node_lat"

node_depth:_FillValue = "fillvalue"

node_depth:valid_range = "valid minimum, valid maximum"

node_depth:grid_mapping = "crs"

Kanten

double edge_depth(edge) ;

edge_depth:standard_name = "sea_floor_depth_below_geoid" ;

edge_depth:long_name = "sea floor depth of 2D mesh edges" ;

edge_depth:units = "m" ;

edge_depth:coordinates = "Mesh2_edge_lon Mesh2_edge_lat"

edge_depth:_FillValue = "fillvalue"

edge_depth:valid_range = "valid minimum, valid maximum"

edge_depth:cell_methods = "area: mean"

edge_depth:grid_mapping = "crs"

Polygone

double poly_depth(poly) ;

poly_depth:standard_name = "sea_floor_depth_below_geoid" ;

poly_depth:long_name = "sea floor depth of 2D mesh polygons" ;

poly_depth:units = "m" ;

poly_depth:coordinates = "Mesh2_poly_lon Mesh2_poly_lat"

poly_depth:_FillValue = "fillvalue"

poly_depth:valid_range = "valid minimum, valid maximum"

poly_depth:cell_methods = "area: mean"

poly_depth:grid_mapping = "crs"

Topologie

Knotenverzeichnis der Polygone

integer poly_nodes(poly,max_poly_nodes)

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

poly_nodes:long_name = "list of 2D mesh nodes for all 2D mesh polygons" ;

poly_nodes:_FillValue = "fillvalue" \\ indicates missing nodes

poly_nodes:valid_range = "valid minimum, valid maximum"

Kantenverzeichnis der Polygone

integer poly_edges(nMesh2_poly,MaX_poly_edges)

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

poly_edges:long_name = "list of 2D mesh edges for all 2D mesh polygons" ;

poly_edges:_FillValue = "fillvalue" \\ indicates missing edges

poly_edges:valid_range = "valid minimum, valid maximum"

Knotenverzeichnis der Kanten

integer edge_nodes(edge,Two)

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

edge_nodes:long_name = "list of 2D mesh nodes for all 2D mesh edges, start node - end node" ;

edge_nodes:_FillValue = "fillvalue" \\ indicates missing nodes

edge_nodes:valid_range = "valid minimum, valid maximum"

Bemerkung: Könnte aus dem Kantenverzeichnis der Polygone sowie dem Knotenverzeichnis der Polygone abgeleitet werden.

Polygonverzeichnis der Kanten

integer edge_polys(edge,Two)

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

edge_polys:long_name = "list of 2D mesh polygons for all 2D mesh edges, left polygon - right polygon" ;

edge_polys:_FillValue = "fillvalue" \\ indicates missing polygons

edge_polys:valid_range = "valid minimum, valid maximum"

Bemerkung: Könnte aus dem Kantenverzeichnis der Polygone sowie dem Knotenverzeichnis der Polygone abgeleitet werden.

Koordinatentransformation

integer crs ;

crs:grid_mapping_name = "transverse_mercator" ;

crs:scale_factor_at_central_merdian = value ;

crs:longitude_of_central_meridian = value ;

crs:latitude_of_projection_origin = value ;

crs:false_easting = value ;

crs:false_northing = value ;

Anmerkungen, Fragen

• Datei ist vollständig CF-konform - keine Erweiterungen erforderlich!
• Ist _FillValue in den Berandungen zulässig?

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