System Default Field Description

When you create a New Dataset, the system generates a series of default fields. Datasets of different engines have different system default fields. Here, UDB Datasource is taken as an example to illustrate the system default fields of different Datasets.

Default fields for Point Dataset

The ordinal of the The X coordinate value of the The Y coordinate value of the The amount of space, in bits, used to

Field Field description

SMID Unique identifier object.

SMX point object.

SMY point object.

SMLIBTIL Maps heet Index number.

SMUSERID Reserved field. Users can customize its content.

SMGEOMETRYSIZE store the object.

Field	Field description
SMID	Unique identifier object.
SMX	point object.
SMY	point object.
SMLIBTIL	Maps heet Index number.
SMUSERID	Reserved field. Users can customize its content.
SMGEOMETRYSIZE	store the object.

Default Fields for Line Dataset

The ordinal of the The length of the The longitude coordinate to the left (west) of the The latitude coordinate above (North) the The longitude coordinate to the right (east) of the The latitude coordinate of the The amount of space, in bits, used to

Field Field description

SMID Unique identifier object.

SMLENGTH line object.

SMSDRIW line object Bounds.

SMSDRIN line object Bounds.

SMSDRIE line object Bounds.

SMSDRIS line object below (south of) Bounds.

SMUSERID Reserved field. Users can customize its content.

SMTOPOERROR Topology error field. Indicates whether the object has a Topology error. Different field values represent different Topology errors.

SMGEOMETRYSIZE store the object.

Field	Field description
SMID	Unique identifier object.
SMLENGTH	line object.
SMSDRIW	line object Bounds.
SMSDRIN	line object Bounds.
SMSDRIE	line object Bounds.
SMSDRIS	line object below (south of) Bounds.
SMUSERID	Reserved field. Users can customize its content.
SMTOPOERROR	Topology error field. Indicates whether the object has a Topology error. Different field values represent different Topology errors.
SMGEOMETRYSIZE	store the object.

Default Fields for Region Dataset

The ordinal of the The longitude coordinate to the left (west) of the The latitude coordinate above (north) the The longitude coordinate to the right (east) of the The latitude coordinate below (south) the The area The amount of space, in bits, used to

Field Field description

SMID Unique identifier object.

SMSDRIW face object Bounds.

SMSDRIN face object Bounds.

SMSDRIE face object Bounds.

SMSDRIS face object Bounds.

SMUSERID Reserved field. Users can customize its content.

SMARE facing the elephant.

SMPERIMETER Face the circumference of the elephant.

SMGEOMETRYSIZE store the object.

Field	Field description
SMID	Unique identifier object.
SMSDRIW	face object Bounds.
SMSDRIN	face object Bounds.
SMSDRIE	face object Bounds.
SMSDRIS	face object Bounds.
SMUSERID	Reserved field. Users can customize its content.
SMARE	facing the elephant.
SMPERIMETER	Face the circumference of the elephant.
SMGEOMETRYSIZE	store the object.

Default fields for Text Dataset

The sequence number of the Longitude coordinates to the left (west) of The latitude coordinate above (North) The longitude coordinate to the right (east) of Latitude coordinate of the area below (South) The amount of space, in bits, used to

Field Field description

SMID Unique identifier object.

SMSDRIW Text Bounds.

SMSDRIN Text Bounds.

SMSDRIE Text Bounds.

SMSDRIS Text Bounds.

SMUSERID Reserved field. Users can customize its content.

SMGEOMETRYSIZE store the object.

Field	Field description
SMID	Unique identifier object.
SMSDRIW	Text Bounds.
SMSDRIN	Text Bounds.
SMSDRIE	Text Bounds.
SMSDRIS	Text Bounds.
SMUSERID	Reserved field. Users can customize its content.
SMGEOMETRYSIZE	store the object.

Default fields for CAD

The ordinal of the Longitude coordinates to the left (west) of Latitude coordinate above (North) The longitude coordinate to the right (east) of Latitude coordinate of the area below (South) The amount of space, in bits, used to

Field Field description

SMID Unique identifier object.

SMSDRIW Compound Bounds.

SMSDRIN Compound Bounds.

SMSDRIE Compound Bounds.

SMSDRIS Compound Bounds.

SMUSERID Reserved field. Users can customize its content.

SMGEOTYPE Different codes represent different Geometry types, such as point, polyline, ellipse, rectangle, circle, etc.

SMLIBTIL Maps heet Index number.

SMGEOMETRYSIZE store the object.

Field	Field description
SMID	Unique identifier object.
SMSDRIW	Compound Bounds.
SMSDRIN	Compound Bounds.
SMSDRIE	Compound Bounds.
SMSDRIS	Compound Bounds.
SMUSERID	Reserved field. Users can customize its content.
SMGEOTYPE	Different codes represent different Geometry types, such as point, polyline, ellipse, rectangle, circle, etc.
SMLIBTIL	Maps heet Index number.
SMGEOMETRYSIZE	store the object.

Default fields for 3D Point Dataset

The sequence number of the The X coordinate value of the The Y coordinate value of the The Z coordinate value of the The amount of space, in bits, used to

Field Field description

SMID Unique identifier object.

SMX point object.

SMY point object.

SMZ point object.

SMUSERID Reserved field. Users can customize its content.

SMGEOMETRYSIZE store the object.

Field	Field description
SMID	Unique identifier object.
SMX	point object.
SMY	point object.
SMZ	point object.
SMUSERID	Reserved field. Users can customize its content.
SMGEOMETRYSIZE	store the object.

Default fields for 3D Line Dataset

The sequence number of the The length of the The longitude coordinate to the left (west) of the The latitude coordinate above (North) the The longitude coordinate to the right (east) of the The latitude coordinate of the The amount of space, in bits, used to

Field Field description

SMID Unique identifier object.

SMLENGTH line object.

SMSDRIW line object Bounds.

SMSDRIN line object Bounds.

SMSDRIE line object Bounds.

SMSDRIS line object below (south of) Bounds.

SMUSERID Reserved field. Users can customize its content.

SMTOPOERROR Topology error field. Indicates whether the object has a Topology error. Different field values represent different Topology errors.

SMGEOMETRYSIZE store the object.

Field	Field description
SMID	Unique identifier object.
SMLENGTH	line object.
SMSDRIW	line object Bounds.
SMSDRIN	line object Bounds.
SMSDRIE	line object Bounds.
SMSDRIS	line object below (south of) Bounds.
SMUSERID	Reserved field. Users can customize its content.
SMTOPOERROR	Topology error field. Indicates whether the object has a Topology error. Different field values represent different Topology errors.
SMGEOMETRYSIZE	store the object.

Default fields for 3D Region Dataset

The ordinal of the The longitude coordinate to the left (west) of the The latitude coordinate above (north) the The longitude coordinate to the right (east) of the The latitude coordinate below (south) the The area The amount of space, in bits, used to

Field Field description

SMID Unique identifier object.

SMSDRIW face object Bounds.

SMSDRIN face object Bounds.

SMSDRIE face object Bounds.

SMSDRIS face object Bounds.

SMUSERID Reserved field. Users can customize its content.

SMARE facing the elephant.

SMPERIMETER Face the circumference of the elephant.

SMGEOMETRYSIZE store the object.

Field	Field description
SMID	Unique identifier object.
SMSDRIW	face object Bounds.
SMSDRIN	face object Bounds.
SMSDRIE	face object Bounds.
SMSDRIS	face object Bounds.
SMUSERID	Reserved field. Users can customize its content.
SMARE	facing the elephant.
SMPERIMETER	Face the circumference of the elephant.
SMGEOMETRYSIZE	store the object.

Hint:

System Field: does not contain four-to-Extent fields: postgis, Yukon, udbx, oraclespatial, sqlserverspatial (Note: spatial databases do not contain four-to-range).
System Field: contains four to Extent fields: oracle, PostgreSQL, MySQL, DM, gaussdb100 (Note: non-spatial databases all contain four to ranges).
Four to Range: Latitude coordinates above (North) and below (South) the object Bounds in the Dataset; Longitude coordinates left (West) and right (East).
Four to Extent Field does not exist for
2D and 3D Point Dataset.