The Figure 1 shows RMC's options of a grid layer. These options are summarized in the Table 1.
Figure 1. Grid tab.
Table 1. RMC's options for grid layer.
| Option | Description |
|---|---|
| Properties | Set properties of the selected layer, it describes in detail below |
| Show Properties | Set properties of the selected layer, it describes in detail below |
| Show Labels | Show labels by L or I, J indices of the grid. it describes 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 Splines Layer | Create a new splines layer in the layer control panel |
| Create New Overlay Layer | Create a new overlay layer in the layer control panel |
| Turn All Layers Off | Show off all existing layers in the layer control panel |
| Turn All Layers On | Show on all existing layers in the layer control panel |
Properties
RMC on the grid layer, then select Properties, the Grid Properties will be popped up, as shown in Figure 2
Layer Name: It shows the name of the layer, a new name can be entered here
Layer Visible: Uncheck this box will not show the grid layer ( the light bulb of the layer in the Control Panel is also turned off)
Show Lines: Uncheck this box will not show the gridlines but other show properties of the grid are still displayed (e.g. Orthogonal Deviation) (Figure 3)
Line Settings: It allows changing the setting style, color, and thickness of the gridlines.
Figure 2. Grid Layer Properties.
Figure 3. Grid's orthogonal deviation with unshown gridlines.
Show Properties
The number of options for show properties of the grid layer is shown in Figure 4 and described in 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. (Figure 4) |
| Cell Aspect Ratio | Show the cell aspect ratio of the grid by color ramp. (Figure 5) |
| Cell Area | Show the area of the grid cells by color ramp. (Figure 6) |
| Cell DX | Show the dimension DX of the grid cells by color ramp. (Figure 7) |
| Cell DY | Show the dimension DY of the grid cells by color ramp. (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
The number of options for show labels of the grid layer is shown in Figure 9 and described in 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. (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. (Figure 11). This option sometimes is helpful when we create the next grid to merge with the previous grid as we want 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. (Figure 12) |
| Bottom Elevation | Updated 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 Figure 10.
Grid Indexing includes options that are summarized in 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 saving the grid to a file with different file formats as shown in Figure 14. These options are summarized in 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. Which can be optional grid file formats as a native file of Grid+ (*.cvl), Delft3D (*.grd), etc. This option also can be accessed from the Export button in the main toolbar. |
| Export To EFDC | Export the selected grid layer to the 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 the shapefile which can open with ArcGIS, QGIS, Global Mapper, etc. |
| Export To KML | Export the selected grid layer to the KML file which can open 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 pop up, as shown in 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.