MarkLogic 9 Product Documentation
geo:arc-intersection

geo:arc-intersection(
   $p1 as cts:point,
   $p2 as cts:point,
   $q1 as cts:point,
   $q2 as cts:point,
   [$options as xs: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.

Example

let $sf := cts:point(37, -122)
let $ny := cts:point(40, -73)
let $a := cts:point(35,-100)
let $b := cts:point(41,-70)
return
geo:arc-intersection($sf,$ny,$a,$b)

=> 40.458347,-76.203682

MarkLogic 9 Product Documentationgeo:arc-intersection

Summary

Usage Notes

See Also

Example

MarkLogic 9 Product Documentation
geo:arc-intersection