【发布时间】:2014-07-25 13:44:23
【问题描述】:
我正在使用地理空间坐标,并在 Rails 控制台中测试我的编码
看起来它正在将我的经度更改为 -90.0 而不是应该是 -93.291557312011719
任何帮助将不胜感激.. 只是尝试过
“点(#{lng} #{lat})”
和
"POINT(#{lng.to_f} #{lat.to_f})"
服务器信息
CentOS 6.4
PostgreSQL 9.3
PostGIS 2.1 With Extensions of adminpack, fuzzystrmatch, pg_trgm, plpgsql
IRB 控制台
1.9.3-p547 :001 > city = "springfield"
=> "springfield"
1.9.3-p547 :002 > state = "mo"
=> "mo"
1.9.3-p547 :003 > lng = "37.208969116210938"
=> "37.208969116210938"
1.9.3-p547 :004 > lat = "-93.291557312011719"
=> "-93.291557312011719"
1.9.3-p547 :005 > l = Location.new({:city => city, :state => state, :coords => "POINT(#{lng.to_f} #{lat.to_f})", :cs => "#{city}, #{state}"})
2014-07-25 08:31:02 DEBUG -- (18.5ms) SELECT * FROM geometry_columns WHERE f_table_name='locations'
=> #<Location id: nil, coords: #<RGeo::Geographic::SphericalPointImpl:0x56eb2f2 "POINT (37.20896911621094 -90.0)">, city: "springfield", state: "mo", zip: nil, created_at: nil, updated_at: nil, cs: "springfield, mo", alt: nil>
但如果我不想保存到数据库,我会得到这个
l = "POINT(#{lng.to_f} #{lat.to_f})"
=> "POINT(37.20896911621094 -93.291557312011719)"
这是我的位置表
create_table "locations", :force => true do |t|
t.spatial "coords", :limit => {:srid=>4326, :type=>"point", :geographic=>true}
t.string "city"
t.string "state"
t.string "zip"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
t.string "cs"
t.text "alt"
end
【问题讨论】:
-
因为在您的示例代码中,您已将 -93.29 分配给纬度,而不是经度,它已向下舍入为 -90,这是纬度可能的下限?
-
谢谢,我现在看到了...我分配了错误的变量...谢谢,如果您发布答案,我会接受。感谢您的帮助
-
你去。有时你只需要另一双眼睛:D
标签: ruby-on-rails postgis irb rgeo geographic-distance