Coordinate System Preferences

Selecting the Coordinate System item on the left panel displays the page for setting the desktop's coordinate system and unit display preferences. These settings are honored by the data display tools that are run in the desktop, such as the Data Selector, Scan Job Manager, and Copy Job Manager. The coordinate system and unit display settings are optional. Data is displayed in the data store's default coordinate system and units if desktop preferences are not set.

PreferencesDialog_CoordinateSystem.jpg

Set the preferred coordinate system

A display coordinate system can be selected in three different ways. A coordinate system can be selected from a data source, from an existing OpenSpirit session, or from the set of predefined EPSG coordinate systems. Setting a coordinate system preference causes all spatial data displayed in the OpenSpirit desktop tools to be transformed to the selected coordinate system for display. Data that cannot be transformed due to coordinate system incompatibilities does not appear (that is, it is displayed as if it were null).

Tip: The desktop coordinate system preference only affects data represented as one of the OpenSpirit geometry types (for example, Point, LineString, Polygon). X/Y or Lat/Long values that appear in native data models as individual values not be transformed to the selected coordinate system.

Set the preferred unit system

Preferences for horizontal units, depth units, and seismic travel time units cause values that represent horizontal distance values, depth measurements, or seismic travel time to be converted for display. Measurement fields must be tagged in the data model as having one of these unit measurement types in order to be unit converted for display.

Tip: For example, the OpenSpirit data model's well log has an attribute called Top Index, which may contain measured depth values or it may contain seismic travel time values. The Top Index attribute therefore is not constrained to a particular unit measurement and values not be unit converted to the desktop unit preferences. The OpenSpirit data model's well pick has an attribute called MD Value, which can only contain measured depth values. The MD Value attribute is assigned a "length vertical" unit measurement, which results in the values being unit converted to the desktop's depth unit preference.