| Description: The bearing_reference_meridian attribute specifies the axis from which the bearing is measured. |
| Namespace Id: cart | Steward: img | Class Name: Distance_and_Bearing_Representation | Type: ASCII_Short_String_Collapsed |
| Minimum Value: None | Maximum Value: None | Minimum Characters: 4 | Maximum Characters: 10 |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: None | Conceptual Domain: SHORT_STRING |
| Status: Active | Nillable: false | Pattern: None |
| Permissible Value(s) | Value | Value Meaning |
| | Assumed | An assumed bearing is one in which the reference direction is straight ahead, where the bearing is measured relative to the direction the navigator is facing. |
| | Astronomic | A astronomic bearing is measured in relation to the North Star, Polaris on Earth. |
| | Geodetic | A geodectic bearing (or true bearing) is measured in relation to true north via a great circle (or the shortest path connecting two points on the surface of the body). |
| | Grid | A grid bearing is measured in relation to the fixed horizontal reference plane of grid north, that is, using the direction northwards along the grid lines of the map projection as a reference point. |
| | Magnetic | A magnetic bearing is measured in relation to magnetic north on Earth. |