MarkLogic 9 Product Documentation
geo.arcIntersectiongeo.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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