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Returns the number of points (vertices) in a geography object. ST_NPoints on a global polyline with 4 vertices

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Signatures

ST_NPoints (A: Geography)

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Parameters

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A
Geography
required
The geography whose vertices are counted.

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Return type

The number of vertices in the geography.

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Example

SELECT ST_NPoints(ST_GeogFromWKT('LINESTRING (0 0, 1 1, 2 2)'));

3