The angle between the geographic meridian and the local magnetic meridian. By convention, the angle is measured with positive degrees to the east and negative degrees to the west of the geographic meridian.

p_magnetic_decl_s (PK, M: CHAR VARYING(19))

Surrogate key of the table.


data_value (M: FLOAT)
data_value_u (FNK, M: CHAR VARYING(15))

pty_magnetic_declination.data_value
The value of magnetic declination.
data_value_u: Defines the unit of measure. Defines a foreign key to table r_uom.


preferred_flag (O: CHAR(1))

property.preferred_flag
The flag is set to True if this instance of property is the preferred value in this data store of this type of property for the object which this property describes.


activity_s (FSK, O: CHAR VARYING(19))
activity_t (O: CHAR VARYING(16))

process_data.activity
Defines the activity which created this instance.
activity_s: Implements a foreign key to a row in one of the tables projected from entity activity depending on the value of the next column (See below).
activity_t: Defines the name of the referenced table. Possible values are defined in @activity.


esrf_point_s (FSK, O: CHAR VARYING(19))
esrf_point_t (O: CHAR VARYING(16))

pty_magnetic_declination.earth_surface_point

esrf_point_s: Implements a foreign key to a row in one of the tables projected from entity earth_surface_point depending on the value of the next column (See below).
esrf_point_t: Defines the name of the referenced table. Possible values are defined in @earth_surface_point.


other_sptl_obj_s (FSK, O: CHAR VARYING(19))
other_sptl_obj_t (O: CHAR VARYING(16))

property.other_spatial_object

other_sptl_obj_s: Implements a foreign key to a row in one of the tables projected from entity other_spatial_object depending on the value of the next column (See below).
other_sptl_obj_t: Defines the name of the referenced table. Possible values are defined in @other_spatial_object.