BreakLine

objekttype

Inspire revision 4711 Gyldig

-- Name -- breakline
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.
Egenskap Stereotype Beskrivelse Type Multiplisitet
breakLineType -- Name -- break line type BreakLineTypeValue (kodeliste) 1..1
geometry -- Name -- geometry GM_Curve 1..1
manMadeBreak -- Name -- man-made break Boolean 1..1
ElevationVectorObject
beginLifespanVersion -- Name -- begin lifespan version DateTime 1..1
endLifespanVersion -- Name -- end lifespan version DateTime 1..1
localDepthDatum -- Name -- local depth datum ChartDatum (datatype) 0..1
- datumWaterLevel -- Name -- datum water level WaterLevelValue (kodeliste) 1..1
- offset -- Name -- offset Measure 0..*
- referencePoint -- Name -- reference point GM_Point 1..*
- scope -- Name -- scope EX_Extent 1..1
propertyType -- Name -- property type ElevationPropertyTypeValue (enumeration) 1..1
- height -- Name -- height 1..1
- depth -- Name -- depth 1..1
Navn Type Lengde Multiplisitet
DateTime 1..1
DateTime 1..1
ChartDatum (datatype) 0..1
WaterLevelValue (kodeliste) 1..1
Measure 0..1
GM_Point 1..1
EX_Extent 1..1
ElevationPropertyTypeValue (enumeration) 1..1
1..1
1..1
BreakLineTypeValue 1..1
GM_Curve 1..1
Boolean 1..1
Name Type English Description
beginLifespanVersion DateTime Date and time at which this version of the spatial object was inserted or changed in the spatial data set.
endLifespanVersion DateTime Date and time at which this version of the spatial object was superseded or retired in the spatial data set.
localDepthDatum ChartDatum (datatype) 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.
- datumWaterLevel WaterLevelValue (kodeliste) Water level determining the origin of depth measurements for the chart datum. -- Description -- EXAMPLE High water, low water, etc. NOTE 1 Values in the code list are applicable either for sea or inland waters. NOTE 2 When defining a depth datum for inland waters, it is recommended the use of "highWater", "lowWater" or "meanWaterLevel" - as applicable. All the other levels in the code list are well defined but usually just locally and do not serve for cross border purposes.
- offset Measure Relative difference between the height of each reference point and the height of the water level determining the chart datum. -- Description -- NOTE 1 In order to calculate the offset parameter, the height(s) of the reference point(s) and the height of the water level determining the chart datum must be compared in the same vertical CRS. NOTE 2 When a single reference point is provided, the offset parameter is supposed to be zero (by default). If this condition is true, there is no need to inform the offset parameter. NOTE 3 When a set of reference points is provided, an individual offset parameter shall be provided for each of these points. The multiplicity between both properties - "referencePoint" and "offset" - is ordered with the aim to maintain this correspondence.
- referencePoint GM_Point Geographical position(s) of: - Case A: a single point which is used to refer depth values within the geographical scope of the chart datum. - Case B: a set of points where water level measurements are performed to determine the water level of the chart datum. -- Description -- NOTE 1 The altimetric position of each reference point must be its height in a common vertical CRS: - in EVRS within its geographical scope (continental Europe). - in a vertical CRS identified and documented by the Member State concerned, outside the geographical scope of EVRS (overseas territories). <font color="#ff0000"> </font>NOTE 2 In Case A - The altimetric position of the reference point can be directly utilised as input to calculate approximate heights in a common vertical CRS for those vector objects whose depth values are referred to the chart datum. NOTE 3 In Case B - The altimetric positions of the reference points can be utilised, together with the respective offset parameter, as input to calculate approximate heights in a common vertical CRS for those vector objects whose depth values are referred to the water level of the chart datum. NOTE 4 The common vertical CRS mentioned in Note 2 and Note 3 shall be the one determined by Note 1.
- scope EX_Extent Geographic scope in which the local depth datum is practically used. -- Description -- NOTE Chart datums should only be used to refer and portray depths at local level, since they are determined by a local water level. EXAMPLE 1 Lake or part of a lake in which a specific water level is used as depth datum. EXAMPLE 2 River section in which a specific water level is used as depth datum. EXAMPLE 3 Extent of the sea area in which a specific local tide level is used as depth datum.
propertyType ElevationPropertyTypeValue (enumeration) 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.
- height Elevation property measured along a plumb line in a direction opposite to Earth's gravity field (upwards). -- Description -- NOTE This definition intentionally avoids making reference to complex geodetic terms. It is only intended to specify the direction in which the elevation property has been measured.
- depth Elevation property measured along a plumb line in a direction coincident to Earth's gravity field (downwards). -- Description -- NOTE This definition intentionally avoids making reference to complex geodetic terms. It is only intended to specify the direction in which the elevation property has been measured.
breakLineType BreakLineTypeValue 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).
geometry GM_Curve Represents the geometric properties of the spatial object.
manMadeBreak Boolean Line which represents an elevation break due to an artificial or man-made construction present on the terrain.

Vis BreakLine i NVDB Datakatalog

Id Navn Type Multiplisitet
BreakLineTypeValue 1 ..1
GM_Curve 1 ..1
Boolean 1 ..1
Assosiasjonstype Navn Kilde Destinasjon
arv subtype BreakLine supertype ElevationVectorObject