With user defined breaks, you can apply the following coloring methods on a surface raster. The break options are:
- Value breaks
- Mean breaks
- Standard Deviation breaks
- Natural breaks
To apply user defined color breaks:
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Select User Defined from the Color Transformation Options drop-down list.
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Select the appropriate break method from the Breaks Defined in drop-down list.
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Select Absolute from the Break options drop-down list.
With value breaks, you can apply grid coloring into ranges based on threshold breaks. Each value range is represented by a different color.
- Value Breaks (N) - Creates N rows equally spaced between the input raster's minimum and maximum cell values. The last row will be at maximum grid value at 100%, and will therefore remain invisible in the histogram.
- Mean Breaks (N) - Calculates N values where N=1 is the mean of the current raster's minimum and maximum cell values. N=2 will be calculated as Mean+1*(Mean-min), and so on. If a value is outside the range of the source raster, the row is removed from the table.
- Standard Deviation Breaks (N) - Calculates N+1 values calculated relative to standard deviation and the mean of the current raster. N1=(Min cell value - 1*Standard Deviation). N2=(-1*Standard Deviation - Mean of cell values). N3=(Mean - 1*Standard Deviation).
- Natural Breaks (N) - Calculates N number of break values, or N+1 rows, based on Jenks Natural Breaks algorithm. Natural breaks determines the best arrangement of values into classes by iteratively comparing sums of the squared difference between observed values within each class and class means.
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Depending upon the selection:
| If you select |
Then |
|---|
| Value Breaks (5) |
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| Mean Breaks (4) |
|
| Standard Deviation Breaks (4) |
|
| Natural Breaks (4) |
|
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Select Percentage from the Break options drop-down list. You can create equally spaced breaks using percentage breaks. For example, Percentage Breaks (5) will create five equally spaced rows - 20, 40, 60, 80, and 100. For example, for a percentage break of 4, you will see the histogram and break tables as:
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Select Percentile from the Break options drop-down list. For example, for a percentile break of 5, you will see the histogram and break tables as:
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Select or clear the Interpolate check-box.
Selecting this check-box will smooth the transitions from one color band to the next.
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Double-click on the histogram to add or delete a break.