arc to segments

syntax

• arc2segm(arc_geom)

definition

arc2segm(arc_geom) divides an arc or polygon data item arc_geom into segments. The function results in a new domain unit with two subitems:

1. point: a point data item with the first point of each segment;
2. nextpoint: a point data item with the last point of each segment.

description

The arc2segm function is used to split up an arc geometry with intermediates that need to become nodes in a network.

applies to

Point data item with fpoint or dpoint value type and composition type arc or polygon.

since version

5.15

example

unit<uint32> segments := arc2segm(road/geometry);

road/geometry

{2 {399246, 112631}{398599, 111866}}

{3 {398599, 111866}{399495, 111924} {401801, 111524}}

{2 {401529, 114921}{398584, 114823}}

domain Road, nr of rows = 3

point	nextpoint
{399246, 112631}	{398599, 111866}
{398599, 111866}	{399495, 111924}
{399495, 111924}	{401801, 111524}
{401529, 114921}	{398584, 114823}

domain segments, nr of rows = 4