Select Initial Colour Zones

The dialog opens when you select multiple grids and/or voxels in the Project Explorer (see the Application Notes below for exceptions), or multiple data layers (aggregates (AGGs), colour symbols (CSYMBs), voxel (VOX) groups, or variable-coloured 2D/3D symbols) in the Map Manager or 3D Manager of a map or 3D view, and then choose the Colour Tool option from the context menu or toolbar.

For each selected item, the dialog displays the colour scheme, distribution method, and number of colour zones. Select the entry that corresponds to the initial colour properties you want to apply to all listed items, then click OK. The selection dialog will close, and the Colour Tool will open, showing the selected colour distribution method and zones. The histogram (binned) data distribution will represent an aggregate of all selected items. You can now interactively revise the colour display (e.g., apply a new colour scheme or distribution) and simultaneously apply the changes to all selected data.

Select Initial Colour Zones dialog options

Name	The name of the selected (grid, voxel) dataset or data layer (e.g., AGG_, CSYMB_, VOX_, or variable-coloured 2D/3D symbol group). Click the Name heading to sort by dataset or data layer name.
Colour scheme	The general representation of the colour scheme for the selected item. If the selected item is a grid currently displayed in a grid window, the zones are taken from the displayed grid. Otherwise, the default ITR for the grid or voxel is used. If no default ITR is found, it will default to the colour table (typically color.tbl) specified in the General Settings dialog. Click here for more information about colour schemes.
Type	The colour distribution or transform method used for each listed colour scheme. Click the Type heading to sort entries by colour distribution type.
Zones	The number of zones defined for each colour scheme. Click the Zones heading to sort the colour schemes by the number of zones.
[OK]	Click to confirm your selection and launch the Colour Tool with the chosen colour scheme and distribution method applied to all listed items.

Application Notes

The option is not applicable to the following data types:

• Geosoft Colour grids and other image files (e.g., GeoTIFF, JPEG): Colours and values in image files cannot be modified.

  If the selected item is based on an image file, the entry will show an "undefined" type (colour transform distribution method) and zero colour zones. These entries cannot be used to assign colour properties to other items.

• Lithology/thematic voxels: These voxels contain categorical values, and blending colours would yield inappropriate results.