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:- point: a point data item with the first point of each segment;
- 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}} |
point | nextpoint |
{399246, 112631} | {398599, 111866} |
{398599, 111866} | {399495, 111924} |
{399495, 111924} | {401801, 111524} |
{401529, 114921} | {398584, 114823} |