def self.down
Tracepoint.update_all("latitude = latitude / 10, longitude = longitude / 10")
- add_index "gps_points", %w(latitude longitude), :name => "points_idx"
+ add_index "gps_points", %w[latitude longitude], :name => "points_idx"
remove_index "gps_points", :name => "points_tile_idx"
remove_column "gps_points", "tile"
end