Environment Canada Government of Canada
 Meteorological Service of Canada World Meteorological Organization 
WOUDC Data Archive Search Form Display Column
 Archive:   current versions of data (available online)  
    older versions of data (since 2000 - offline)  
 Content:    Link to Maps by Content  
 Location:    Link to Platform List  
   Link to WMO Regions
  minimum maximum    
     Latitude  -90 to 90 (north positive)
     Longitude  -180 to 180 (east positive)
     Height  metres above sea level
 Agency:    Link to Agency List  
 Instrument:    Link to Instrument List  
 Date:   or later (yyyy-mm-dd)    
  - Requires Category as Content selection or as Display Column,
    and applies only to Active Data Archive.