Project Preferences - Map & Units Tab

Set the project's map units as either Meters or Feet.

Select which engine to use to convert your coordinates:

• Global Engine - Select this option for international projects.
• North American Engine - Select this option for projects in North America.

Select a coordinate projection for the project:

• <Set Project Projection> - Click to open a dialog box, where you can set the projection information for your current project.
• <View Projections> - This button is only available if you select the Global Engine. Click to open the View Projection Definitionsdialog box, where you can view your coordinate projections.

Set the project's depth units as either Meters or Feet. This defines the unit of measurement for the fields in the Seismic Datum section of this dialog box. Read more.

Edit the fields in this section to define the seismic datum, which is the line or surface in the earth that corresponds to zero time on seismic traces.

• Elevation - Type the elevation. The unit of measurements will be either meters or feet, as selected in the Depth Units section of this dialog box.
• Replacement Velocity - Type the replacement velocity (per second). for the project. The unit of measurement will be either meters or feet, as selected in the Depth Units section of this dialog box. The velocity replaces the near surface layers between the ground surface and the datum.

• Maps Update Dynamically - This check box is selected by default so that ProductName dynamically updates maps as you pick data. If you clear this check box, you must activate the Map window to view the changes. Typically, you will only clear this setting to save time when you are picking large datasets or when your computer speed is slow.
• Maps ReScale Dynamically - Select this check box to re-scale maps and color ranges for horizon postings as you pick your seismic data. If you are volume picking large 3D areas, selecting this option can slow down the speed of your computer.

• Radius - Set the distance in meters to project wells onto seismic lines. You may want to keep this distance small in development areas, so that only the closest wells appear on your data. Conversely, in a wildcat area, set a large projection distance.
• Only Project to 3D’s Nearest Bin - Select this check box to have ProductName project the well to the nearest in-line and cross-line only. Clear the check box to use the radius setting for the in-lines/cross-lines.