path-parser | A small utility to parse paths | Parser library

I'm trying to crack an R workflow for parsing SVG paths, using this file on this webpage. I'm encountering artifacts in the positioning of resulting polygons:

Some of the countries do not align with their neighbours - e.g. US/Canada, US/Mexico, Russia/Asian neighbours. Since the effect hits the countries with more complex polygons it seems likely to be a problem to do with cumulative summing, but I'm unclear where the problem lies in my workflow, which is:

1. parse raw SVG as XML, and extract all the SVG path strings
2. parse individual path strings with nodejs's svg-path-parser module
3. process the resulting data.frames (which combine absolute and relative coordinates) into all absolute coordinates

I reproduce the full workflow here using R (for US/Canada), with an external call to nodejs:

I am having some trouble with get the param from the url. I use Express(4.16.3) on the server side, and using Axios to make the request. But I couldn't seem to get the param from the url in Express.

Here is my code:

on my Route.js in Express