PostGIS  2.5.7dev-r@@SVN_REVISION@@

◆ lwgeom_locate_between()

LWCOLLECTION* lwgeom_locate_between ( const LWGEOM *  lwin,
double  from,
double  to,
double  offset 
)

Determine the segments along a measured line that fall within the m-range given.

Return as a multiline or geometrycollection. Offset to left (positive) or right (negative).

Definition at line 848 of file lwlinearreferencing.c.

849 {
850  if ( ! lwgeom_has_m(lwin) )
851  lwerror("Input geometry does not have a measure dimension");
852 
853  return lwgeom_clip_to_ordinate_range(lwin, 'M', from, to, offset);
854 }
lwgeom_has_m
int lwgeom_has_m(const LWGEOM *geom)
Return LW_TRUE if geometry has M ordinates.
Definition: lwgeom.c:937
lwerror
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
lwgeom_clip_to_ordinate_range
LWCOLLECTION * lwgeom_clip_to_ordinate_range(const LWGEOM *lwin, char ordinate, double from, double to, double offset)
Given a geometry clip based on the from/to range of one of its ordinates (x, y, z,...
Definition: lwlinearreferencing.c:778

References lwerror(), lwgeom_clip_to_ordinate_range(), and lwgeom_has_m().

Here is the call graph for this function: