| 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Date and time at which this version of the spatial object was superseded or retired in the spatial data set.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.
|
| geometry |
GM_Surface |
|
Represents the geometric properties of the spatial object.
|