Class: Terraformer::FeatureCollection

Inherits:
Primitive
  • Object
show all
Defined in:
lib/terraformer/feature.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Primitive

#bbox, #envelope, #to_json, #type

Constructor Details

#initialize(*args) ⇒ FeatureCollection

Returns a new instance of FeatureCollection.



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# File 'lib/terraformer/feature.rb', line 63

def initialize *args
  unless args.empty?
    super *args do |arg|
      self.features = arg['features'].map {|f| Terraformer.parse f unless Primitive === f}
    end
  end
end

Instance Attribute Details

#crs ⇒ Object

Returns the value of attribute crs.



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# File 'lib/terraformer/feature.rb', line 53

def crs
  @crs
end

#features ⇒ Object 



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# File 'lib/terraformer/feature.rb', line 71

def features
  @features ||= []
end

Class Method Details

.with_features(*f) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/terraformer/feature.rb', line 56

def self.with_features *f
  raise ArgumentError unless f.all? {|e| Feature === e}
  fc = FeatureCollection.new
  fc.features = f
  fc
end

Instance Method Details

#<<(feature) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/terraformer/feature.rb', line 75

def << feature
  raise ArgumentError unless Feature === feature
  features << feature
end

#==(obj) ⇒ Object 



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# File 'lib/terraformer/feature.rb', line 89

def == obj
  return false unless FeatureCollection === obj
  to_hash == obj.to_hash
end

#convex_hull ⇒ Object 



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# File 'lib/terraformer/feature.rb', line 94

def convex_hull
  ConvexHull.for features.map(&:geometry).map(&:coordinates)
end

#geojson_io ⇒ Object 



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# File 'lib/terraformer/feature.rb', line 98

def geojson_io
  Terraformer.geojson_io self
end

#to_hash(*args) ⇒ Object 



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# File 'lib/terraformer/feature.rb', line 80

def to_hash *args
  h = {
    type: type,
    features: features.map {|f| f.to_hash *args}
  }
  h[:crs] = crs if crs
  h
end