X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/c878da25cf42d98f1666760549fd015c09f5dabe..b7276be79b61b94c57dfc30d4421157e49a3f7c0:/lib/geo_record.rb?ds=sidebyside

diff --git a/lib/geo_record.rb b/lib/geo_record.rb
index f1a923c42..025bbe4a8 100644
--- a/lib/geo_record.rb
+++ b/lib/geo_record.rb
@@ -37,6 +37,15 @@ module GeoRecord
     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
   
   def lat2y(a)