57 lines
1.3 KiB
Ruby
57 lines
1.3 KiB
Ruby
require "delegate"
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module GeoRecord
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# Ensure that when coordinates are printed that they are always in decimal degrees,
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# and not e.g. 4.0e-05
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# Unfortunately you can't extend Numeric classes directly (e.g. `Coord < Float`).
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class Coord < DelegateClass(Float)
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def initialize(obj)
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super(obj)
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end
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def to_s
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format("%.7f", self)
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end
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end
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# This scaling factor is used to convert between the float lat/lon that is
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# returned by the API, and the integer lat/lon equivalent that is stored in
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# the database.
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SCALE = 10000000
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def self.included(base)
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base.scope :bbox, ->(bbox) { base.where(OSM.sql_for_area(bbox)) }
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base.before_save :update_tile
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end
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# Is this node within -90 >= latitude >= 90 and -180 >= longitude >= 180
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# * returns true/false
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def in_world?
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return false if lat < -90 || lat > 90
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return false if lon < -180 || lon > 180
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true
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end
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def update_tile
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self.tile = QuadTile.tile_for_point(lat, lon)
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end
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def lat=(l)
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self.latitude = (l * SCALE).round
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end
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def lon=(l)
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self.longitude = (l * SCALE).round
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end
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# Return WGS84 latitude
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def lat
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Coord.new(latitude.to_f / SCALE)
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end
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# Return WGS84 longitude
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def lon
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Coord.new(longitude.to_f / SCALE)
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end
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end
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