forked from openstreetmap/openstreetmap-website
/
geo_record.rb
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/
geo_record.rb
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module GeoRecord
# This scaling factor is used to convert between the float lat/lon that is
# returned by the API, and the integer lat/lon equivalent that is stored in
# the database.
SCALE = 10000000
def self.included(base)
base.scope :bbox, ->(bbox) { base.where(OSM.sql_for_area(bbox)) }
base.before_save :update_tile
end
# Is this node within -90 >= latitude >= 90 and -180 >= longitude >= 180
# * returns true/false
def in_world?
return false if self.lat < -90 or self.lat > 90
return false if self.lon < -180 or self.lon > 180
return true
end
def update_tile
self.tile = QuadTile.tile_for_point(lat, lon)
end
def lat=(l)
self.latitude = (l * SCALE).round
end
def lon=(l)
self.longitude = (l * SCALE).round
end
# Return WGS84 latitude
def lat
return self.latitude.to_f / SCALE
end
# Return WGS84 longitude
def lon
return self.longitude.to_f / SCALE
end
private
def lat2y(a)
180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
end
end