UTRSUB GRID.DAT

Basic Information

File-Type

utrsub_grid.dat

File-Form

FORMATTED

Version

1.x / September 2010

Description-Date

December 2010

Significance of the File

contains grid data for the numerical model UnTRIM2 (with SubGrid data)

File-Contents (in Catchwords)

1. static informations:
   • number of vertices;
   • number of edges (geometric edges of a grid);
   • number of polygons (geometric polygons of a grid);
   • number of red polygons;
   • number of polygons at open boundaries;
   • number of internal edges;
   • last edge number with Dirichlet boundary condition (number of edges with flow);
   • mean geographic latitude;
   • EPSG code for coordinate transformation (see EPSG Geodetic Parameter Registry);
   • informative text;
   • number of subpolygons (larger or equal than number of polygons);
   • number of subedges (larger or equal than number of edges with flow).
2. dynamic data:
   • vertex data (for each vertex):
     • vertex number (informative),
     • x- and y-coordinate, and
     • (optional) vertex depth.
   • polygon data (for each polygon):
     • polygon number (informative),
     • number of vertices (and edges),
     • x- and y-coordinate of the center (meaningful for the computational method),
     • node indices (anti clockwise sorting), and
     • edge indices (anti clockwise sorting).
   • edge data (for each edge):
     • edge number (informative),
     • first node of an edge,
     • second node of an edge,
     • indices of adjacent polygons (0 indicates missing polygons - boundary edge).
   • subpolygon data (for each polygon):
     • polygon number (informative),
     • number of local subpolygons,
     • areas for all local subpolygons (the sum of all subpolygon areas must be less than or equal to the geometric polygon area), and
     • depths for all local subpolygons.
   • subedge data (for each edge):
     • edge number (informative),
     • number of local subedges,
     • lengths of all local subedges (the sum of all subedge lengths must be less than or equal to the geometric edge length), and
     • depths for all local subedges.

Programs using this Type of File

GRIDCONVERT, SGHVIEW2D, UNTRIM2, UTRPRE, VVIEW2D

Example-File

see $PROGHOME/examples/lib/h_grid/

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