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JavaScript cts.polygon

MarkLogic 12 Product Documentation
cts:polygon

cts:polygon(
   $vertices as (cts:point*|xs:string)
) as cts:polygon

Summary

Returns a geospatial polygon value.

Parameters
vertices The vertices of the polygon, given in order. No edge may cover more than 180 degrees of either latitude or longitude. The polygon as a whole may not encompass both poles. These constraints are necessary to ensure an unambiguous interpretation of the polygon. There must be at least three vertices. The first vertex should be identical to the last vertex to close the polygon. Alternatively, the vertices may be provided as a string that follows the well-known text (WKT) scheme for a polygon.

See Also

Example

  (: this polygon approximates the 94041 zip code :)
  let $points := (cts:point(0.373899653086420E+02, -0.122078578406509E+03),
    cts:point(0.373765400000000E+02, -0.122063772000000E+03),
    cts:point(0.373781400000000E+02, -0.122067972000000E+03),
    cts:point(0.373825650000000E+02, -0.122068365000000E+03),
    cts:point(0.373797400000000E+02, -0.122072172000000E+03),
    cts:point(0.373899400000000E+02, -0.122092573000000E+03),
    cts:point(0.373941400000000E+02, -0.122095573000000E+03),
    cts:point(0.373966400000000E+02, -0.122094173000000E+03),
    cts:point(0.373958400000000E+02, -0.122092373000000E+03),
    cts:point(0.374004400000000E+02, -0.122091273000000E+03),
    cts:point(0.374004400000000E+02, -0.122091273000000E+03),
    cts:point(0.373873400000000E+02, -0.122057872000000E+03),
    cts:point(0.373873400000000E+02, -0.122057872000000E+03),
    cts:point(0.373854400000000E+02, -0.122052672000000E+03),
    cts:point(0.373833400000000E+02, -0.122053372000000E+03),
    cts:point(0.373819400000000E+02, -0.122057572000000E+03),
    cts:point(0.373775400000000E+02, -0.122060872000000E+03),
    cts:point(0.373765400000000E+02, -0.122063772000000E+03) )
  return
  cts:polygon($points)

Example

(: Note that the points are in longitude-latitude pairs :)
let $points := 'POLYGON ((
    122.078578406509 37.3899653086420,
    122.063772000000 37.3765400000000,
    122.067972000000 37.3781400000000,
    ...
    122.078578406509 37.3899653086420
  ))'
return cts:polygon($points)

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