Created by Mark Thomas, last modified on Nov 18, 2023

Sections

Introduction

Prepending is a special insertion case where, the insertion occurs before the head vertex of the polyline.

Splicing

Splicing polylines is basically inserting one polyline to another at an end. Below shows splicing/prepending a provided polyline to an existing polyline:

  1. Prepend last vertex (Step II)

  2. Move vertex node head to first vertex

  1. Add segment splice (Step III)

(Step V)

  1. Append segment splice to prepended polyline.

  2. Prepend segment splice to existing segments.

  3. Move segment node head to first segment

Attachments:

gis_ly-geometry-7-prependVertex.jpg (image/jpeg)
gis_ly-geometry-7-prependSplice2.jpg (image/jpeg)
gis_ly-geometry-7-prependSplice1.jpg (image/jpeg)
gis_ly-geometry-7-prependSplice3.jpg (image/jpeg)