X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/cfc14f1ddc0b451dbfdd5994e5672b2f1b11e0a8..34e3e51456774127d43408b7ab65c24f41373f62:/lib/geo_record.rb diff --git a/lib/geo_record.rb b/lib/geo_record.rb index 025bbe4a8..7c65e3af2 100644 --- a/lib/geo_record.rb +++ b/lib/geo_record.rb @@ -1,10 +1,12 @@ module GeoRecord - def self.included(base) - base.extend(ClassMethods) - end + # 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 before_save - self.update_tile + 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 @@ -20,44 +22,26 @@ module GeoRecord end def lat=(l) - self.latitude = (l * 10000000).round + self.latitude = (l * SCALE).round end def lon=(l) - self.longitude = (l * 10000000).round + self.longitude = (l * SCALE).round end # Return WGS84 latitude def lat - return self.latitude.to_f / 10000000 + return self.latitude.to_f / SCALE end # Return WGS84 longitude def lon - return self.longitude.to_f / 10000000 - end - - # Potlatch projections - def lon_potlatch(baselong,masterscale) - (self.lon-baselong)*masterscale + return self.longitude.to_f / SCALE end - def lat_potlatch(basey,masterscale) - -(lat2y(self.lat)-basey)*masterscale - end - private - + def lat2y(a) 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2)) end - - module ClassMethods - def find_by_area(minlat, minlon, maxlat, maxlon, options) - self.with_scope(:find => {:conditions => OSM.sql_for_area(minlat, minlon, maxlat, maxlon)}) do - return self.find(:all, options) - end - end - end end -