# Talk:Amsterdam Ordnance Datum

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## SEA VS NAP

If it's not sea level... It's relation to sea level must be stated, taking into account world sea level.

## Equatorial bulge thingy

The concept of the equatorial bulge means that earth bulges arount the equator. As a paradox, it seems that the conequences are greater the farter away one is from the equator. Unless I am wrong, if Germany uses the standard as in Amsterdam, it will only mean that the farter south, the taller the altitude. That would be even if Germany was shaped like a pancake. Could someone please confirm or disconfirm a such notion?(82.134.28.194 (talk) 06:44, 16 July 2010 (UTC))

## Apparent Inconsistancy

This sentence: "He found that the water level at an average summer flood in the sea arm (when the water level reaches its maximum, not counting storms) was about the same as the level on the other side of the seadike, plus the margin of 9 feet and 5 inches." appears to read that at average summer flood, the water level in the Ij [the sea arm, also sea inlet below] was 9 ft 5 inches higher than in the Amsterdam canals.

This following sentence: "The waterlevel in the canals of Amsterdam—which is quite constant—called Amsterdam Peil (AP), equaled the level at summer flood at sea in the sea-inlet, which changes throughout the year." seems to contradict that.

Is this a translation problem, or should this article be pulled? It really says little about NAP. Drienstra (talk) 16:54, 15 February 2013 (UTC)

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