praszuk

Boundaries splitter

The tool can be used to transform a GeoJSON file with Polygons and MultiPolygons into a GeoJSON file with LineStrings, which makes it easier to replace geometries in the JOSM editor.

How it works

The script splits boundary lines at their intersections.
E.g. 3 borders areas (polygons), each one has a line which may duplicate edges of another like for green & red and red & blue:

praszuk

// ==UserScript==
// @name         OSM-website actions
// @namespace    http://tampermonkey.net/
// @version      1.1.1
// @description  Add few quick actions below changeset id
// @author       praszuk
// @match        https://www.openstreetmap.org/changeset*
// @icon         https://www.openstreetmap.org/favicon.ico
// @grant        none
// @run-at       document-idle