Suppose you have an arbitrary GeoJSON file, and the publisher didn't give much supporting documentation - or perhaps it's been provided by a third party who don't know much about it.
Is there a standard way to identify what CRS or SRS the file is in? For example, is there a readily available tool (like a web tool) that can read such a file and identify this?
I'm writing some documentation for a process that is to be used for preparing spatial boundary data files for a process, for converting files from arbitrary publishers into accepted formats, and I'd like a step that users (who usually won't have much specific GIS experience) can follow to see if they need to convert their file's CRS/SRS and if so, what from.
I've seen Identifying Coordinate System of Shapefile when Unknown? but that seems to be exclusive to Shape files.