MarkLogic Server 11.0 Product Documentation
cts.geospatialElementReferencects.geospatialElementReference(
element as xs.QName,
[options as String[]]
) as cts.reference
Summary
Creates a reference to a geospatial element range index, for use as a
parameter to
cts.valueTuples
.
This function will throw an exception if the
specified range index does not exist.
Parameters |
element |
An element name. |
options |
Options. The default is ().
Options include:
- "type=type"
- Use the lexicon with the type specified by type
(point or long-lat-point)
- "coordinate-system=string"
- Use the given coordinate system. Valid values are:
- wgs84
- The WGS84 coordinate system with degrees as the angular unit.
- wgs84/radians
- The WGS84 coordinate system with radians as the angular unit.
- wgs84/double
- The WGS84 coordinate system at double precision with degrees as the angular unit.
- wgs84/radians/double
- The WGS84 coordinate system at double precision with radians as the angular unit.
- etrs89
- The ETRS89 coordinate system.
- etrs89/double
- The ETRS89 coordinate system at double precision.
- raw
- The raw (unmapped) coordinate system.
- raw/double
- The raw coordinate system at double precision.
- "precision=value"
- Use the coordinate system at the given precision. Allowed values:
float and double .
- "nullable"
- Allow null values in tuples reported from
cts.valueTuples
when using this lexicon.
- "unchecked"
- Read the scalar type and coordinate-system info
only from the input. Do not check the definition against the
context database.
|
Usage Notes
The value of the
precision
option takes precedence over
that implied by the governing coordinate system name, including the
value of the
coordinate-system
option. For example, if the
governing coordinate system is "wgs84/double" and the
precision
option is "float", then the reference uses single precision. An exception is
thrown if no index with the specified precision exists.
See Also
Example
cts.geospatialElementReference(xs.QName("point"));
=> cts.geospatialElementReference(fn.QName("","point"),
["type=point","coordinate-system=wgs84"])
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