The Spline layer has a range of special options that are accessed by RMC on the spline title in the tree view (Figure 1). These options are summarized in the Spline Layer: RMC Options#Table 1.
Figure 1. Grid tab.
Table 1. RMC options for grid layer.
| Option | Description |
|---|---|
| Properties | Set properties of the selected layer (described in detail below) |
| Show Properties | Set properties of the selected layer (described in detail below) |
| Show Labels | Show labels by L or I, J indices of the grid (described in detail below) |
| Zoom to Layer | Zoom the view to the selected layer |
| Grid Indexing | Show different options for indices of the grid |
| Export To | Export the selected layer to an external file with a different optional format. It describes in detail below |
| Remove | Delete the selected layer |
| Create New Spline Layer | Create a new spline layer in the layer control panel |
| Create New Overlay Layer | Create a new overlay layer in the layer control panel |
| Turn All Layers Off | Hide all existing layers in the layer control panel |
| Turn All Layers On | Display all existing layers in the layer control panel |
Grid Properties
RMC on the grid layer, then select Properties, and the Grid Properties will be displayed, as shown in Figure 2. The options here include:
- Layer Name: show the name of the layer, a new name can be entered here
- Layer Visible: unchecking this box will hide the grid layer ( the light bulb of the layer in the Control Panel is also turned off)
- Show Lines: unchecking this box will hide the gridlines but sill other show properties of the grid e.g. Orthogonal Deviation. This is demonstrated in Figure 3.
- Line Settings: allows the changing of setting style, color, and thickness of the gridlines.
Figure 2. Grid Layer Properties.
Figure 3. Orthogonal deviation of the grid with gridlines hidden.
Show Properties
A number of options for displaying the properties of the grid layer are shown in Spline Layer: RMC Options#Figure 4 and further described in Spline Layer: RMC Options#Table 2.
Figure 3. Show Properties.
Table 2. Show Properties.
| Option | Description |
|---|---|
| None | Show the grid only |
| Orthogonal Deviation | Show the orthogonal deviation of the grid by color ramp (see Spline Layer: RMC Options#Figure 4) |
| Cell Aspect Ratio | Show the cell aspect ratio of the grid by color ramp (see Spline Layer: RMC Options#Figure 5) |
| Cell Area | Show the area of the grid cells by color ramp (see Spline Layer: RMC Options#Figure 6) |
| Cell DX | Show the dimension DX of the grid cells by color ramp (see Spline Layer: RMC Options#Figure 7) |
| Cell DY | Show the dimension DY of the grid cells by color ramp (see Spline Layer: RMC Options#Figure 8) |
Figure 4. Show Properties: Orthogonal Deviation.
Figure 5. Show Properties: Cell Aspect Ratio.
Figure 6. Show Properties: Cell Area.
Figure 7. Show Properties: Cell DX.
Figure 8. Show Properties: Cell DY.
Show Labels
A number of options for displaying the labels of the grid layer are shown in Spline Layer: RMC Options#Figure 9 and further described in Spline Layer: RMC Options#Table 3.
Figure 9. Show Labels of the grid.
Table 3. Show Labels for grid layer.
| Option | Description |
|---|---|
| None | Only the grid is displayed |
| Cell L Index | Show the L index number of the grid cells, each cell has only an L index. (Spline Layer: RMC Options#Figure 10) |
| Cell I,J Indices | Show the I and J indices number of the grid cells, each cell has a pair of I and J indices. (Spline Layer: RMC Options#Figure 11). This option sometimes is helpful when we create a new grid that we want to merge with the previous grid. In this case, we need to know the number of cells along a segment of the previous grid. |
| Nodal I,J Indices | Show the I and J indices number of the grid nodes, each grid node has a pair of I and J indices. (Spline Layer: RMC Options#Figure 12) |
| Bottom Elevation | To be implemented later. |
Figure 10. Show Labels: Cell L Index.
Figure 11. Show Labels: Cell I,J Indices.
Figure 12. Show Labels: Nodal I,J Indices.
Figure 13. Show Labels: Bottom Elevation.
Grid Indexing
When a grid is generated each cell or node has an I and J coordinate. Sometimes these are not in the direction that the user requires. The Grid Indexing tool allows the user to reverse the I and J coordinates either separately, or at the same time.
To display the I, J labels of the grid, select the grid layer in the Layer Control then RMC. Select Show Labels (e.g Cell IJ Indices) as shown in Spline Layer: RMC Options#Figure 10.
Grid Indexing includes a number of options that are summarized in Spline Layer: RMC Options#Table 4:
Table 4. Grid Indexing
| Option | Description |
|---|---|
| Transpose I - J Indices | Reverses both the I and J indices of the selected grid at the same time. |
| Flip I Indices | Reverses only the I indices of the selected grid. |
| Flip J Indices | Reverses only the I indices of the selected grid. |
| Rotate Indices Clockwise | Orders the indices in a clockwise direction. |
| Rotate Indices Counter-Clockwise | It is the opposite of the Rotate Indices Clockwise. |
Export
The Export option allows the saving of the grid to a file. A range of different file formats are supported as shown in Figure 14 and further summarized in Spline Layer: RMC Options#Table 5. The function of these options is similar to the Export button described in Main toolbar buttons.
Figure 14. Export grid layer options.
Table 5. Export Grid to a file.
| Option | Description |
|---|---|
| Export Grid | Export the selected grid layer to an external grid file. Grid file formats can be a native file of Grid+ (*.cvl), Delft3D (*.grd), or others. This option also can be accessed from the Export button in the main toolbar. |
| Export To EFDC | Export the selected grid layer to an EFDC input file (including corners.inp, dxdy.inp, lxly.inp). These files can open with EEMS. |
| Export To Shapefile | Export the selected grid layer to a shapefile which can be opened with ArcGIS, QGIS, Global Mapper, etc. |
| Export To KML | Export the selected grid layer toa KML file which can be opened with Google Earth, Global Mapper, etc. |
| Export Outline | Export outline of the selected grid layer to a text file (*.p2d). |
Once selecting the Export Grid option, the Export to Grid form will be displayed, as shown in Spline Layer: RMC Options#Figure 15. Define the file type from the drop-down list then enter a file name. Define the folder location to locate the file then click the Save button.
Figure 15. Export grid to file.