Create a 4-Grid Composite

Use the Grid and Image > Display on Map > 4-Grid Composite menu option (GRIDIMG4 GX) to place an aggregate of 4 grid images on a map.

4-Grid Composite dialog options

Colouring method

Specify the colour zoning method for rendering colour distributions. Select one of the options below:

  • As last displayed: the grid is displayed in its last viewed state: its previous colour transform is used, and the currently selected colour scheme will be ignored.

  • Default: the default colour distribution method is used.

  • Histogram equalization: your data values are evaluated, and the zones are statistically determined, such that data is equally divided among the histogram bins.
  • Normal distribution: your data is assumed to be normally distributed, and the zones are determined based on the standard distribution for a standard bell curve.
  • Linear: the range of data values are divided linearly into even increments.
  • Log-Linear: the zone values are updated based on the log distribution of the data, and the data is displayed using the log-linear colour distribution.

Script Parameter: GRIDIMG4.ZONE

Grid name 1

first grid name

Script Parameter: GRIDIMG4.GRID1

Colour table 1

Select the colour scheme for rendering the image of the first grid. If you mouse over the colour scheme entry, a tooltip will display the name of the colour table in its folder. To modify the selection, click on the colour entry and then navigate through the scheme categories.

Script Parameter: GRIDIMG4.COLOR1

Grid name 2

Second grid name

Script Parameter: GRIDIMG4.GRID2

Colour table 2

Select the colour scheme for rendering the image of the second grid. If you mouse over the colour scheme entry, a tooltip will display the name of the colour table in its folder. To modify the selection, click on the colour entry and then navigate through the scheme categories.

Script Parameter: GRIDIMG4.COLOR2

Grid name 3

Third grid name

Script Parameter: GRIDIMG4.GRID3

Colour table 3

Select the colour scheme for rendering the image of the third grid. If you mouse over the colour scheme entry, a tooltip will display the name of the colour table in its folder. To modify the selection, click on the colour entry and then navigate through the scheme categories.

Script Parameter: GRIDIMG4.COLOR3

Grid name 4

Fourth grid name

Script Parameter: GRIDIMG4.GRID4

Colour table 4

Select the colour scheme for rendering the image of the fourth grid. If you mouse over the colour scheme entry, a tooltip will display the name of the colour table in its folder. To modify the selection, click on the colour entry and then navigate through the scheme categories.

Script Parameter: GRIDIMG4.COLOR4

Render method

Select the render method.

ADD - All the colours are added together.

BLEND – All the colours are added then divided by the number of valid (non-dummy) colours.

BLEND EQUAL – All the colours are added then divided by the number of colours.

Script Parameter: GRIDIMG4.METHOD

Application Notes

Click the New Map button to display a grid on a new map. Click the Current Map button to display the grid on the current map. (For script file, set Script Parameter: GRIDIMG4.NEW to 1 to create a new map; 0 to use current map)