module GeoRecord
+ def self.included(base)
+ base.extend(ClassMethods)
+ end
+
def before_save
self.update_tile
end
return true
end
- def self.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
-
def update_tile
self.tile = QuadTile.tile_for_point(lat, lon)
end
return self.longitude.to_f / 10000000
end
- # Potlatch projections
- def lon_potlatch(baselong,masterscale)
- (self.lon-baselong)*masterscale
- end
-
- def lat_potlatch(basey,masterscale)
- -(lat2y(self.lat)-basey)*masterscale
- end
-
- private
+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