I am given an ArcGIS polyline (or polypoint) from a WFS service (e.g. 1693669.5143, 5672605.5392), and am looking for a function (python, java, whatever) to convert it to a lat/lon so I can use it in Google Maps. I obviously have the projection as well.
I've googled this extensively but most of the results return ArcGIS's solution http://pro.arcgis.com/en/pro-app/tool-reference/data-management/add-xy-coordinates.htm - i.e. tool-specific
Is there an online tool or converter to do this, or (ideally) a function or library that I can use directly from code?