• chain

  EPSG:9097
  
  

• US survey chain

  EPSG:9033
  
  

• Clarke's chain

  EPSG:9038
  
  

• British chain (Sears 1922)

  EPSG:9042
  
  

• British chain (Benoit 1895 A)

  EPSG:9052
  
  

• British chain (Benoit 1895 B)

  EPSG:9062
  
  

• British chain (Sears 1922 truncated)

  EPSG:9301
  
  

• 1

Type of results

• Operation (2)

•    Conversion (2)

• Units (7)

•    Length (7)