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Grid Layer: RMC Options

Grid Layer: RMC Options

The grid layer has a range of special options that are accessed by RMC on the grid title in the tree view (Figure 1). These options are summarized in the Table 1.

Figure 1. Grid tab.



Table 1. RMC options for grid layer.

Option

Description

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 Figure 4 and further described in Table 2.

Figure 3. Show Properties.



Table 2. Show Properties.

Option

Description

Option

Description

None

Show the grid only

Orthogonal Deviation

Show the orthogonal deviation of the grid by color ramp (see Figure 4)

Cell Aspect Ratio

Show the cell aspect ratio of the grid by color ramp (see Figure 5)

Cell Area

Show the area of the grid cells by color ramp (see Figure 6)

Cell DX

Show the dimension DX of the grid cells by color ramp (see Figure 7)

Cell DY

Show the dimension DY of the grid cells by color ramp (see 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 Figure 9 and further described in Table 3.



Figure 9. Show Labels of the grid.



Table 3. Show Labels for grid layer.

Option

Description

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 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. (Figure 12)

Bottom Elevation

Show elevation values of the grid nodes. (Figure 13)

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 a number of options that are summarized in Table 4:

Table 4. Grid Indexing

Option

Description

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 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

Option

Description

Export Grid

Export the selected grid layer to an external grid file. Grid file formats can be a native file of Grid+ (*.gpc), CVLGrid (*.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 to a 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 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. Then the Coordinate System form will pop up, select the proper project then click the OK button as shown in Figure 16. When the exporting is done, a message will pop up as shown in Figure 17, click the OK button to close the form.



Figure 15. Export grid to file.

Figure 16. Select projection form.

Figure 17. Export grid message.



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