DUG Insight How-To: Using class settings to accurately compare horizons

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Data objects in Insight are most effectively displayed
when the correct colour range is applied
This single horizon is being displayed with a spectrum colour bar
but only a few colours are visible
because the colour range does not match the data range
A histogram is a simple way to see the actual horizon value range
The horizon settings shows that the current colour range
is using the min and max class settings
Turning this option off
allows me to adjust the range to match the horizon exactly
The colour min max range is now the same as the histogram
as expected
and the horizon shows much more colour variation
as desired
If I add 2 more horizons to the view
I can see that each horizon has its own local range of colour
showing the maximum detail for that surface
It is not possible however
to compare the horizon values
the red colour represents a very different time value for each event
To make a direct comparison between multiple objects
I need to set the same range of colours for each object
This can be done quickly by changing the ranges back to the class settings
Now each horizon is using the same range
But now we are back to the original issue
there are only a few colours here, blue is missing
The range needs editing
but this time it can be done simultaneously
for all horizons by changing the class range
Now that each time value has a unique colour
the horizons are comparable to each other
and it is clear which are deeper than the others
The same principle applies for all other objects in Insight
for example matching seismic volumes from different surveys or vintages
To update multiple volumes simultaneously
use the same class for each volume

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DUG Insight How-To: Using class settings to accurately compare horizons

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