47 lines
1,016 B
Ruby
47 lines
1,016 B
Ruby
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 lat < -90 || lat > 90
|
|
return false if lon < -180 || lon > 180
|
|
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
|
|
latitude.to_f / SCALE
|
|
end
|
|
|
|
# Return WGS84 longitude
|
|
def lon
|
|
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
|