Pitney Bowes MapInfo Vertical Mapper - Manual (Page 104)

Using the Dictionary Editor for Classified Grids
102
Vertical Mapper 3.7
The Contrast box enables you to determine the difference between the lightest and darkest tones in
an image. Increasing the contrast setting will make the brighter areas brighter and the darker areas
darker. Both are measured on a scale of one to 255, and the default values presented in the dialog
box are considered appropriate for most renderings.
The Brightness box enables you to set a measure of both the colour intensity and overall greyness
of an image. Increasing brightness will increase colour intensity as well as reduce the greyness of an
image.
Note Setting the azimuth to 90 through 270 degrees may cause an optical illusion where hills look
like valleys and valleys look like hills.
Using the Dictionary Editor for Classified Grids
The Dictionary Editor is used to assign colour values to each unique category of cells found in a
classified grid, just as the Grid Colour tool is used to assign gradient colours according to the range
of values found in a numeric grid.
1. In the Grid Manager, choose a classified grid (.grc).
2. Click the Colour button.
Exploring the Dictionary Editor Dialog Box
All of the display and colour options available for classified grid files are contained in the Dictionary
Editor.
This dialog box displays a complete hierarchical list of all of the groups and subgroups of classified
cells that comprise the grid file as well as the corresponding colour assigned to each unique
category.
You can move a classification entry by choosing it and dragging it to a new position. You can edit the
colours assigned to any category by double-clicking on an entry.