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

#encode_with, #eql?, #hash, #init_with, #inspect, #marshal_dump, #marshal_load, #to_s, #to_wkt

Constructor Details

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

:nodoc:



332
333
334
335
336
337
338
339
340
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 332

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.



343
344
345
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 343

def dx
  @dx
end

#dy ⇒ Object (readonly)

Bursa Wolf shift in meters.



346
347
348
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 346

def dy
  @dy
end

#dz ⇒ Object (readonly)

Bursa Wolf shift in meters.



349
350
351
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 349

def dz
  @dz
end

#ex ⇒ Object (readonly)

Bursa Wolf rotation in arc seconds.



352
353
354
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 352

def ex
  @ex
end

#ey ⇒ Object (readonly)

Bursa Wolf rotation in arc seconds.



355
356
357
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 355

def ey
  @ey
end

#ez ⇒ Object (readonly)

Bursa Wolf rotation in arc seconds.



358
359
360
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 358

def ez
  @ez
end

#ppm ⇒ Object (readonly)

Bursa Wolf scaling in in parts per million.



361
362
363
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 361

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.



373
374
375
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 373

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:



363
364
365
 
# File 'lib/rgeo/coord_sys/cs/entities.rb', line 363

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