+
+ def escape_query(query)
+ return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))
+ end
+
+ def convert_latlon
+ @query = params[:query]
+
+ if latlon = @query.match(/^([NS])\s*(\d{1,3}(\.\d*)?)\W*([EW])\s*(\d{1,3}(\.\d*)?)$/).try(:captures) # [NSEW] decimal degrees
+ params[:query] = nsew_to_decdeg(latlon)
+ elsif latlon = @query.match(/^(\d{1,3}(\.\d*)?)\s*([NS])\W*(\d{1,3}(\.\d*)?)\s*([EW])$/).try(:captures) # decimal degrees [NSEW]
+ params[:query] = nsew_to_decdeg(latlon)
+
+ elsif latlon = @query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?$/).try(:captures) # [NSEW] degrees, decimal minutes
+ params[:query] = ddm_to_decdeg(latlon)
+ elsif latlon = @query.match(/^(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\s*([NS])\W*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\s*([EW])$/).try(:captures) # degrees, decimal minutes [NSEW]
+ params[:query] = ddm_to_decdeg(latlon)
+
+ elsif latlon = @query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?$/).try(:captures) # [NSEW] degrees, minutes, decimal seconds
+ params[:query] = dms_to_decdeg(latlon)
+ elsif latlon = @query.match(/^(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]\s*([NS])\W*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\s*([EW])$/).try(:captures) # degrees, minutes, decimal seconds [NSEW]
+ params[:query] = dms_to_decdeg(latlon)
+ else
+ return
+ end
+ end
+
+ def nsew_to_decdeg(captures)
+ begin
+ Float(captures[0])
+ captures[1].downcase != 's' ? lat = captures[0].to_f : lat = -(captures[0].to_f)
+ captures[4].downcase != 'w' ? lon = captures[3].to_f : lon = -(captures[3].to_f)
+ rescue
+ captures[0].downcase != 's' ? lat = captures[1].to_f : lat = -(captures[1].to_f)
+ captures[3].downcase != 'w' ? lon = captures[4].to_f : lon = -(captures[4].to_f)
+ end
+ return "#{lat}, #{lon}"
+ end
+
+ def ddm_to_decdeg(captures)
+ begin
+ Float(captures[0])
+ captures[3].downcase != 's' ? lat = captures[0].to_f + captures[1].to_f/60 : lat = -(captures[0].to_f + captures[1].to_f/60)
+ captures[7].downcase != 'w' ? lon = captures[4].to_f + captures[5].to_f/60 : lon = -(captures[4].to_f + captures[5].to_f/60)
+ rescue
+ captures[0].downcase != 's' ? lat = captures[1].to_f + captures[2].to_f/60 : lat = -(captures[1].to_f + captures[2].to_f/60)
+ captures[4].downcase != 'w' ? lon = captures[5].to_f + captures[6].to_f/60 : lon = -(captures[5].to_f + captures[6].to_f/60)
+ end
+ return "#{lat}, #{lon}"
+ end
+
+ def dms_to_decdeg(captures)
+ begin
+ Float(captures[0])
+ captures[4].downcase != 's' ? lat = captures[0].to_f + (captures[1].to_f + captures[2].to_f/60)/60 : lat = -(captures[0].to_f + (captures[1].to_f + captures[2].to_f/60)/60)
+ captures[9].downcase != 'w' ? lon = captures[5].to_f + (captures[6].to_f + captures[7].to_f/60)/60 : lon = -(captures[5].to_f + (captures[6].to_f + captures[7].to_f/60)/60)
+ rescue
+ captures[0].downcase != 's' ? lat = captures[1].to_f + (captures[2].to_f + captures[3].to_f/60)/60 : lat = -(captures[1].to_f + (captures[2].to_f + captures[3].to_f/60)/60)
+ captures[5].downcase != 'w' ? lon = captures[6].to_f + (captures[7].to_f + captures[8].to_f/60)/60 : lon = -(captures[6].to_f + (captures[7].to_f + captures[8].to_f/60)/60)
+ end
+ return "#{lat}, #{lon}"
+ end
+