Geometric primitive::GM

: Public <<type>> Class

Created:	23.5.2022 18.05.07
Modified:	1.8.2022 13.54.08

Project:
Author:	Marko Kauppi
Version:	2003
Phase:	IS
Status:	Approved
Complexity:
Difficulty:
Priority:
Multiplicity:
Advanced:
UUID:	{0700BF66-938E-40ad-B9EE-44B0A80987B6}
Appears In:	Fig 05: Geometry basic classes , Fig 14: Direct Position , Context Diagram: GM_PointRef, Fig 26: Composite, Fig 27: Composite Point View, Context Diagram: GM_CompositePoint, Fig 08: GM_Primitive, Fig 09: GM_Point, Fig 07: Geometry Boundary Data Types, Context Diagram: GM_Point, Context Diagram: GM_CurveBoundary, Geometry Root

GM_Point (Figure 9) is the basic data type for a geometric object consisting of one and only one point.

Attributes
Operations
Associations To
Associations From
Tagged Values
Advanced
Other Links

Attribute

Public DirectPosition
position

Details:

Alias:
Initial:
Stereotype:
Ordered:
Range:
Transient:	False
Derived:	False
IsID:	False

Notes:

The attribute "position" shall be the DirectPosition of this GM_Point. GM_Point::position [1] : DirectPosition NOTE In most cases, the state of a GM_Point is fully determined by its position attribute. The only exception to this is if the GM_Point has been subclassed to provide additional non-geometric information such as symbology.

Operation

Public
bearing(

toPoint: GM_Position,

Default:
Kind:	inout
Stereotype:

):Bearing

Details:

Sequential

Notes:

Returns the vector bearing of the second point with respect to the first. So. P1.Bearing(P2) is a unit vector based at P1 pointing towards P2. The operation "bearing" shall return the bearing of the tangent (at this GM_Point) to the curve between this GM_Point and a passed DirectPosition. GM_Point::bearing(point : DirectPosition) : Vector The choice of the curve type for defining the bearing is dependent on the CRS in which this GM_Point is defined. For example, in Mercator Projections in its most common usage, the curve is the rhumb line. In a 3D, geocentric coordinate system, the curve may be the geodesic joining the two points along the surface of the geoid in use. Implementation supporting this function shall specify the nature of the curve to be used.

Public
boundary():NULL

Details:

Sequential

Notes:

The operation "GM_Point::boundary" is a specialization of the boundary operation at GM_Object, and shall return an empty set. GM_Point::boundary() : NULL

Public
GM_Point(

position: GM_Position,

Default:
Kind:	inout
Stereotype:

):GM_Point

Details:

Sequential

Element	Source Role	Target Role
«type» GM_CompositePoint Class	Name: generator	Name: composite
Details:

Element	Source Role	Target Role
«FeatureType» Transformer Class	Name:	Name: geometry
Details:
GM_PointRef Class	Name:	Name: point
Details:
«FeatureType» Pole Class	Name:	Name: geometry
Details:
«type» GM_CurveBoundary Class	Name:	Name: endPoint
Details:
«type» GM_CurveBoundary Class	Name:	Name: startPoint
Details:

Tag	Value
persistence	persistent
Details:

Property	Value
isFinalSpecialization:	0

Object	Type	Connection	Direction	Notes
«type» GM_CompositePoint	Class	Generalization	From
Point	Interface	Dependency	To
«type» GM_Primitive	Class	Generalization	To