|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
1. Purpose and objectives
To carry a line-of-levels from a permanent bench mark to a gauging
station bench mark.
To obtain accurate and reliable stage data, the station bench mark
must be referred to a fixed datum. This datum could be established by the
Geodetic Survey of Canada or another organization. If the station is not
close to established bench marks, bench marks are established close to the
Elevation of starting point.
Elevation of finishing point.
5. Operational requirements and restrictions
Levelling parties require trained technical persons.
6. Form of presentation
Published report :
7. Operational experience
Levelling has been carried out for years by Water Survey of Canada and
8. Originator and technical support
Water Survey of Canada
10. Conditions on use
Free. Full acknowledgement of use is expected.
|(First entered: 15 JAN 81||
Last updated: 14 DEC 1999)