GMS:Creating and Editing UGrids

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UGrid Module
VoronoiUGrid.png
UGrid
Creating and Editing
Viewing Modes
Converting to Other Data Types
Exporting UGrids
UGrid Interpolation
More
Display Options
Tool Palette
Cell Properties
UGrid Commands

There are a number of ways to create UGrids.

Importing

UGrids can be imported from a VTK XML file by selecting the File|Open command or by dragging and dropping the file onto the GMS window. GMS recognizes the ".vtu" extension, which by convention is the extension used for a VTK XML file containing an unstructured grid.

Map -> UGrid

The Map -> UGrid command creates a UGrid from feature objects. It can be found in the Feature Objects menu and in some pop-up menus when right-clicking on items in the Project Explorer (Coverage, Grid Frame). The command opens the Create UGrid dialog.

Create UGrid dialog.

Create UGrid Dialog

  • Dimension - Specifies whether a 2D or 3D UGrid will be created.
  • UGrid type
    • Regular (not refined) - Creates a grid with rectangular cells that are not refined.
    • Quad tree - Creates a grid with rectangular cells that is refined around refine points and arcs with cell sizes increasing in size with distance from the points and arcs.
    • Voronoi - Creates a Voronoi grid with cells of various sizes and shapes to meet the Voronoi criteria. The active coverage must contain a polygon because it is first meshed with a triangular mesh and refined around points and arcs.
  • Refine points - If the quad tree option is selected and refine points exist in multiple coverages, specifies which refine points to use.
  • X, Y, Z number of cells
    • If not using the Voronoi UGrid type, the size and number of cells in the X, Y and Z dimensions can be specified. For quad tree UGrids, the cell size represents the large, unrefined size because the small, refined size is determined by the refine points and arcs.

If a grid frame exists, it is used to determine the location of the grid.

Conversion From Other Data Types

The following data types can be converted to UGrids by right-clicking on the object in the Project Explorer and selecting the Convert To > UGrid command from the pop-up menu.

Horizons

The Horizons -> UGrid command (in the TINs and Boreholes menus) uses horizons to create a 3D UGrid.