Break Line - Spatial object type

Definition: A line of a critical nature which describes the shape of an elevation surface and indicates a discontinuity in the slope of the surface (i.e. an abrupt change in gradient). Triangles included within a TIN model must never cross it.

Description: SOURCE Adapted from [ISO 19107:2003].EXAMPLE Breaklines represent local ridges or depressions (streams or drainage lines) in the surface, man-made structures (e.g. roads), etc. NOTE 1 A breakline connects points with different elevation and therefore its description using 2.5-D coordinates (using the ''geometry'' attribute) is fully recommended.NOTE 2 No triangle in a TIN may cross a breakline (in other words, breakline segments are enforced as triangle edges), even if doing so violates the triangulation criterion.NOTE 3 All breaklines are located on the ground surface or on any of the artificial structures built on it. NOTE 4 Breaklines are useful as input data for the generation of a more appropriate or accurate digital elevation model by using interpolation methods.

INSPIRE Data Theme: Elevation - [INSPIRE Data Theme Elevation]

INSPIRE Application schema: Elevation - Vector Elements - [INSPIRE Application schema Elevation - Vector Elements]

Subtype of: Elevation Vector Object


Attributes

Definition: The type of break line with regard the natural or man-made real world characteristic it represents, or the specific function it has in calculating a Digital Elevation Model (DEM).

Multiplicity: 1

Valuetype: BreakLineTypeValue

Definition: Represents the geometric properties of the spatial object.

Multiplicity: 1

Valuetype: GM_Curve

Definition: Line which represents an elevation break due to an artificial or man-made construction present on the terrain.

Multiplicity: 1

Stereotypes: voidable

Valuetype: Boolean

Definition: Date and time at which this version of the spatial object was inserted or changed in the spatial data set.

Multiplicity: 1

Stereotypes: voidable

Valuetype: DateTime

Definition: Date and time at which this version of the spatial object was superseded or retired in the spatial data set.

Multiplicity: 1

Stereotypes: voidable

Valuetype: DateTime

Definition: Identification of a local vertical coordinate reference system not included in a registry, which is used to refer depth measurements.

Description: NOTE This data type is applicable only to bathymetric vector objects.EXAMPLE Local datums for referring depths in lakes and navigable rivers.

Multiplicity: 0...1

Valuetype: ChartDatum

Definition: Attribute categorizing the elevation vector object as a land-elevation or a bathymetry spatial object. It determines the elevation property represented by the object.

Description: EXAMPLE Height, depth.

Multiplicity: 1

Valuetype: ElevationPropertyTypeValue



Back to top