ST_3DLineInterpolatePoint
Name
ST_3DLineInterpolatePoint — Returns a point interpolated along a 3D line at a fractional location.
Synopsis
geometry
ST_3DLineInterpolatePoint
(
geometry
a_linestring
, float8
a_fraction
)
;
Description
Returns a point interpolated along a 3D line at a fractional location. First argument must be a LINESTRING. Second argument is a float between 0 and 1 representing the point location as a fraction of line length. The M value is interpolated if present.
ST_LineInterpolatePoint computes points in 2D and then interpolates the values for Z and M, while this function computes points in 3D and only interpolates the M value. |
Availability: 3.0.0
This function supports 3d and will not drop the z-index.