Class: RGeo::CoordSys::CS::GeocentricCoordinateSystem
- Inherits:
-
CoordinateSystem
- Object
- Base
- Info
- CoordinateSystem
- RGeo::CoordSys::CS::GeocentricCoordinateSystem
- Defined in:
- lib/rgeo/coord_sys/cs/entities.rb
Overview
OGC spec description
A 3D coordinate system, with its origin at the centre of the Earth. The X axis points towards the prime meridian. The Y axis points East or West. The Z axis points North or South. By default the Z axis will point North, and the Y axis will point East (e.g. a right handed system), but you should check the axes for non-default values.
Instance Attribute Summary collapse
-
#horizontal_datum ⇒ Object
readonly
Returns the HorizontalDatum.
-
#linear_unit ⇒ Object
readonly
Gets the units used along all the axes.
-
#prime_meridian ⇒ Object
readonly
Returns the PrimeMeridian.
Attributes inherited from CoordinateSystem
Attributes inherited from Info
#abbreviation, #alias, #authority, #authority_code, #name, #remarks
Class Method Summary collapse
-
.create(name, horizontal_datum, prime_meridian, linear_unit, axis0, axis1, axis2, *optional) ⇒ Object
Create a GeocentricCoordinateSystem given a name, a HorizontalDatum, a PrimeMeridian, a LinearUnit, and three AxisInfo objects.
Instance Method Summary collapse
- #geographic? ⇒ Boolean
-
#get_axis(index) ⇒ Object
Implements CoordinateSystem#get_axis.
-
#get_units(_index) ⇒ Object
Implements CoordinateSystem#get_units.
-
#initialize(name, horizontal_datum, prime_meridian, linear_unit, axis0, axis1, axis2, *optional) ⇒ GeocentricCoordinateSystem
constructor
:nodoc:.
- #wkt_typename ⇒ Object
Methods inherited from CoordinateSystem
create_from_wkt, #projected?, #transform_coords
Methods inherited from Info
Methods inherited from Base
#encode_with, #eql?, #hash, #init_with, #inspect, #marshal_dump, #marshal_load, #to_s, #to_wkt
Constructor Details
#initialize(name, horizontal_datum, prime_meridian, linear_unit, axis0, axis1, axis2, *optional) ⇒ GeocentricCoordinateSystem
:nodoc:
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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 1106 def initialize(name, horizontal_datum, prime_meridian, linear_unit, axis0, axis1, axis2, *optional) # :nodoc: super(name, 3, *optional) @horizontal_datum = horizontal_datum @prime_meridian = prime_meridian @linear_unit = linear_unit @axis0 = axis0 @axis1 = axis1 @axis2 = axis2 end |
Instance Attribute Details
#horizontal_datum ⇒ Object (readonly)
Returns the HorizontalDatum. The horizontal datum is used to determine where the centre of the Earth is considered to be. All coordinate points will be measured from the centre of the Earth, and not the surface.
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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 1120 def horizontal_datum @horizontal_datum end |
#linear_unit ⇒ Object (readonly)
Gets the units used along all the axes.
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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 1126 def linear_unit @linear_unit end |
#prime_meridian ⇒ Object (readonly)
Returns the PrimeMeridian.
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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 1123 def prime_meridian @prime_meridian end |
Class Method Details
.create(name, horizontal_datum, prime_meridian, linear_unit, axis0, axis1, axis2, *optional) ⇒ Object
Create a GeocentricCoordinateSystem given a name, a HorizontalDatum, a PrimeMeridian, a LinearUnit, and three AxisInfo objects. The AxisInfo are optional and may be nil. You may also provide the optional parameters specified by the Info interface.
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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 1155 def create(name, horizontal_datum, prime_meridian, linear_unit, axis0, axis1, axis2, *optional) new(name, horizontal_datum, prime_meridian, linear_unit, axis0, axis1, axis2, *optional) end |
Instance Method Details
#geographic? ⇒ Boolean
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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 1140 def geographic? true end |
#get_axis(index) ⇒ Object
Implements CoordinateSystem#get_axis
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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 1136 def get_axis(index) [@axis0, @axis1, @axis2][index] end |
#get_units(_index) ⇒ Object
Implements CoordinateSystem#get_units
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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 1130 def get_units(_index) @linear_unit end |
#wkt_typename ⇒ Object
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# File 'lib/rgeo/coord_sys/cs/entities.rb', line 1144 def wkt_typename "GEOCCS" end |