Statements (16)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
vertical datum
|
| gptkbp:abbreviation |
SLD29
|
| gptkbp:alsoKnownAs |
National Geodetic Vertical Datum of 1929
|
| gptkbp:category |
geodesy
surveying |
| gptkbp:establishedBy |
gptkb:United_States_Coast_and_Geodetic_Survey
|
| gptkbp:establishedIn |
1929
|
| https://www.w3.org/2000/01/rdf-schema#label |
Sea Level Datum of 1929
|
| gptkbp:purpose |
standardize elevation measurements
|
| gptkbp:referencePoint |
mean sea level at 26 tide gauges
|
| gptkbp:replacedBy |
gptkb:North_American_Vertical_Datum_of_1988
yes |
| gptkbp:usedIn |
gptkb:Canada
gptkb:United_States |
| gptkbp:bfsParent |
gptkb:North_American_Vertical_Datum_of_1929
|
| gptkbp:bfsLayer |
8
|