struct WKB::Position

• WKB::Position
• Struct
• Value
• Object

Overview

A position is the base entity to represent coordinates in geometry objects.

Positions are a thin wrapper around a slice of double precision floats, they have a mode, and they can also be empty.

Included Modules

• Indexable(Float64)

Defined in:

wkb/geojson.cr
wkb/position.cr

Constructors

• .new(coordinates : Array(Float64), mode : Mode)

  Creates a position with the given coordinates (which can be empty) and coordinate mode.

• .new(pull : JSON::PullParser)

  NOTE It's necessary to require the GeoJSON extension after loading the library.

Instance Method Summary

• #has_m?

  Returns true if the M coordinate is supported.

• #has_z?

  Returns true if the Z coordinate is supported.

• #has_zm?

  Returns true if both Z and M coordinates are supported.

• #m

  Returns the M coordinate or Float64::NAN if empty or the mode has not M.

• #mode : WKB::Mode

  Returns the position's coordinate mode.

• #size

  Returns the number of coordinates.

• #slice : Slice(Float64)

  Returns the underlying slice of coordinates.

• #to_coordinates : Array(Float64)

  Returns a representation of coordinates as an array.

• #to_json(builder : JSON::Builder)

  NOTE It's necessary to require the GeoJSON extension after loading the library.

• #x

  Returns the X coordinate or Float64::NAN if empty.

• #y

  Returns the Y coordinate or Float64::NAN if empty.

• #z

  Returns the Z coordinate or Float64::NAN if empty or the mode has not Z.

Constructor Detail

Instance Method Detail