Class: RGeo::CoordSys::CS::WGS84ConversionInfo

Inherits:
Base
  • Object
show all
Defined in:
lib/rgeo/coord_sys/cs/entities.rb

Overview

OGC spec description

Parameters for a geographic transformation into WGS84. The Bursa Wolf parameters should be applied to geocentric coordinates, where the X axis points towards the Greenwich Prime Meridian, the Y axis points East, and the Z axis points North.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#eql?, #inspect, #to_s, #to_wkt

Constructor Details

#initialize(dx_, dy_, dz_, ex_, ey_, ez_, ppm_) ⇒ WGS84ConversionInfo

:nodoc:



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 351

def initialize(dx_, dy_, dz_, ex_, ey_, ez_, ppm_)  # :nodoc:
  @dx = dx_.to_f
  @dy = dy_.to_f
  @dz = dz_.to_f
  @ex = ex_.to_f
  @ey = ey_.to_f
  @ez = ez_.to_f
  @ppm = ppm_.to_f
end

Instance Attribute Details

#dx ⇒ Object (readonly)

Bursa Wolf shift in meters.



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 363

def dx
  @dx
end

#dy ⇒ Object (readonly)

Bursa Wolf shift in meters.



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 366

def dy
  @dy
end

#dz ⇒ Object (readonly)

Bursa Wolf shift in meters.



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 369

def dz
  @dz
end

#ex ⇒ Object (readonly)

Bursa Wolf rotation in arc seconds.



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 372

def ex
  @ex
end

#ey ⇒ Object (readonly)

Bursa Wolf rotation in arc seconds.



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 375

def ey
  @ey
end

#ez ⇒ Object (readonly)

Bursa Wolf rotation in arc seconds.



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 378

def ez
  @ez
end

#ppm ⇒ Object (readonly)

Bursa Wolf scaling in in parts per million.



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 381

def ppm
  @ppm
end

Class Method Details

.create(dx_, dy_, dz_, ex_, ey_, ez_, ppm_) ⇒ Object

Create the horizontal datum shift transformation into WGS84, given the seven Bursa Wolf parameters. The Bursa Wolf shift should be in meters, the rotation in arc seconds, and the scaling in parts per million.



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 397

def create(dx_, dy_, dz_, ex_, ey_, ez_, ppm_)
  new(dx_, dy_, dz_, ex_, ey_, ez_, ppm_)
end

Instance Method Details

#_to_wkt(open_, close_) ⇒ Object

:nodoc:



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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 384

def _to_wkt(open_, close_)  # :nodoc:
  "TOWGS84#{open_}#{@dx},#{@dy},#{@dz},#{@ex},#{@ey},#{@ez},#{@ppm}#{close_}"
end