source: subversion/sites/rails_port/lib/geo_record.rb @ 9148

Last change on this file since 9148 was 9148, checked in by tomhughes, 12 years ago

Merge potlatch_010 properly.

File size: 1.1 KB
Line 
1module GeoRecord
2  def self.included(base)
3    base.extend(ClassMethods)
4  end
5
6  def before_save
7    self.update_tile
8  end
9
10  # Is this node within -90 >= latitude >= 90 and -180 >= longitude >= 180
11  # * returns true/false
12  def in_world?
13    return false if self.lat < -90 or self.lat > 90
14    return false if self.lon < -180 or self.lon > 180
15    return true
16  end
17
18  def update_tile
19    self.tile = QuadTile.tile_for_point(lat, lon)
20  end
21
22  def lat=(l)
23    self.latitude = (l * 10000000).round
24  end
25
26  def lon=(l)
27    self.longitude = (l * 10000000).round
28  end
29
30  # Return WGS84 latitude
31  def lat
32    return self.latitude.to_f / 10000000
33  end
34
35  # Return WGS84 longitude
36  def lon
37    return self.longitude.to_f / 10000000
38  end
39
40private
41 
42  def lat2y(a)
43    180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
44  end
45
46  module ClassMethods
47    def find_by_area(minlat, minlon, maxlat, maxlon, options)
48      self.with_scope(:find => {:conditions => OSM.sql_for_area(minlat, minlon, maxlat, maxlon)}) do
49        return self.find(:all, options)
50      end
51    end
52  end
53end
54
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