Class: BlacklightMaps::Geometry::BoundingBox

Inherits:
Object
  • Object
show all
Defined in:
lib/blacklight/maps/geometry.rb

Overview

This class contains Bounding Box objects and methods for interacting with them.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(points) ⇒ BoundingBox

points is an array containing longitude and latitude values which relate to the southwest and northeast points of a bounding box

west, south, east, north

([minX, minY, maxX, maxY]).



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# File 'lib/blacklight/maps/geometry.rb', line 12

def initialize(points)
  @west = points[0].to_f
  @south = points[1].to_f
  @east = points[2].to_f
  @north = points[3].to_f
end

Class Method Details

.from_lon_lat_string(points) ⇒ Object

Creates a new bounding box from from a string of points “-100 -50 100 50” (south west north east)



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# File 'lib/blacklight/maps/geometry.rb', line 42

def self.from_lon_lat_string(points)
  new(points.split(' '))
end

.from_wkt_envelope(envelope) ⇒ Object

Creates a new bounding box from from a Solr WKT Envelope string “ENVELOPE(34.26, 35.89, 33.33, 29.47)” (minX, maxX, maxY, minY)



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# File 'lib/blacklight/maps/geometry.rb', line 48

def self.from_wkt_envelope(envelope)
  coords = envelope.gsub(/[[A-Z]\(\)]/, '')&.split(', ')
  new([coords[0], coords[3], coords[1], coords[2]])
end

Instance Method Details

#find_center ⇒ Object

Returns an array [lng, lat] which is the centerpoint of a BoundingBox.



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# File 'lib/blacklight/maps/geometry.rb', line 32

def find_center
  center = []
  center[0] = (@west + @east) / 2
  center[1] = (@south + @north) / 2
  center[0] -= 180 if @west > @east # handle bboxes that cross the dateline
  center
end

#geojson_geometry_array ⇒ Object 



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# File 'lib/blacklight/maps/geometry.rb', line 19

def geojson_geometry_array
  [
    [
      [@west, @south],
      [@east, @south],
      [@east, @north],
      [@west, @north],
      [@west, @south]
    ]
  ]
end

#to_a ⇒ Object 



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# File 'lib/blacklight/maps/geometry.rb', line 53

def to_a
  [@west, @south, @east, @north]
end