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XQuery geo:arc-intersection

MarkLogic 10 Product Documentation
geo.arcIntersection

geo.arcIntersection(
   p1 as cts.point,
   p2 as cts.point,
   q1 as cts.point,
   q2 as cts.point,
   [options as String[]]
) as cts.point

Summary

Returns the point at the intersection of two arcs. If the arcs do not intersect, or lie on the same great circle, or if either arc covers more than 180 degrees, an error is raised.

Parameters
p1 The starting point of the first arc.
p2 The ending point of the first arc.
q1 The starting point of the second arc.
q2 The ending point of the second arc.
options Options for the operation. The default is ().

Options include:

"coordinate-system=string"
Use the given coordinate system. Valid values are:
wgs84
The WGS84 coordinate system.
wgs84/double
The WGS84 coordinate system at double precision.
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.
"units=value"
Measure distance and the radii of circles in the specified units. Allowed values: miles (default), km, feet, meters.
"tolerance=distance"
Tolerance is the largest allowable variation in geometry calculations. If the distance between two points is less than tolerance, then the two points are considered equal. For the raw coordinate system, use the units of the coordinates. For geographic coordinate systems, use the units specified by the units option.

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 operation uses single precision.

See Also

Example

const sf = cts.point(37, -122);
const ny = cts.point(40, -73)
const a = cts.point(35,-100)
const b = cts.point(41,-70)
geo.arcIntersection(sf, ny, a, b);

=> 40.458347,-76.203682

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