class RGeo::CoordSys::CS::LocalCoordinateSystem

OGC spec description

A local coordinate system, with uncertain relationship to the world. In general, a local coordinate system cannot be related to other coordinate systems. However, if two objects supporting this interface have the same dimension, axes, units and datum then client code is permitted to assume that the two coordinate systems are identical. This allows several datasets from a common source (e.g. a CAD system) to be overlaid. In addition, some implementations of the Coordinate Transformation (CT) package may have a mechanism for correlating local datums. (E.g. from a database of transformations, which is created and maintained from real-world measurements.)

Notes

RGeo’s implementation does not provide the Coordinate Transformation (CT) package.

Attributes

local_datum[R]

Gets the local datum.

Public Class Methods

create(name_, local_datum_, unit_, axes_, *optional_) click to toggle source

Create a LocalCoordinateSystem given a name, a LocalDatum, a Unit, and an array of at least one AxisInfo. You may also provide the optional parameters specified by the Info interface.

# File lib/rgeo/coord_sys/cs/entities.rb, line 1236
def create(name_, local_datum_, unit_, axes_, *optional_)
  new(name_, local_datum_, unit_, axes_, *optional_)
end

Public Instance Methods

get_axis(index_) click to toggle source

Implements RGeo::CoordSys::CS::CoordinateSystem#get_axis

# File lib/rgeo/coord_sys/cs/entities.rb, line 1207
def get_axis(index_)
  @axes[index_]
end

get_units(index_) click to toggle source

Implements RGeo::CoordSys::CS::CoordinateSystem#get_units

# File lib/rgeo/coord_sys/cs/entities.rb, line 1214
def get_units(index_)
  @unit
end