View Data Histogram

How to open the Data Histogram dialog box

About the Data Histogram

Use the Data Histogram dialog box to examine a graphical display of how colors are distributed over the value ranges of your posted map or seismic data. You can display histogram representations of time, amplitude, depth, velocity, time slices, horizon conformal slices, or attribute surfaces.

The horizontal axis shows the range of values for your data. If the color range is currently set to auto zoom, the vertical axis shows the number of data samples posted inside the current Map or Seismic window. Otherwise, the vertical axis shows the number of data samples across your entire data set. The top of the dialog box indicates which of these sources WinPICS is using for the data range.

The color bars show the distribution of your posted data that corresponds to the range of values.

Current Value

As you move your cursor over the histogram, a vertical line tracks the data value at that location on the axis. This value, displays to the fourth decimal point, appears beneath the histogram.

Zoom the histogram

To zoom in for a closer look at an area of the histogram, click at the top left corner of the area and drag down and right to draw a box around it.

To undo a zoom, click and drag up and to the left.

Edit the horizon pick

The <More> button in the Data Histogram dialog box enables you to edit the ranges of your data. Use this function to find out what data values are above, below or within data ranges of the histogram.

Click <More> to display options for editing the current horizon pick using the data histogram. View image

By default, your cursor is in zoom mode, as explained above. However, you can change the cursor mode to set minimum and maximum values, and clip the current horizon or grid. Follow these steps:

Select Pick Minimum Value.
On the data histogram, click the location on the x axis where you want to clip the minimum end of the horizon. The value you clicked appears in the Minimum Value box below.

You can track the exact value where you cursor is at by watching the Current Value is: number below the data histogram.

Select Pick Maximum Value.
On the data histogram, click the location on the x axis where you want to clip the maximum end of the horizon. The value you clicked appears in the Maximum Value box below.
Click <OK>. The Modifying Surface via Histogram dialog box opens.
If you want to create a new horizon or grid, click <Ok>. If you don't want to create a new horizon, click <Cancel>.
Each time you create a new horizon or grid, it appears in the Horizon/Grid list as the same name as the original, followed by an ascending numeral (1, 2, etc.).

To rename a horizon or grid, right-click on it in the Object Manager, and select Rename from the menu.

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