I have a GeoTIFF served via a GeoServer WMS service and referenced in the EPSG:404000 CRS (Wildcard 2D cartesian plane in metric unit).
I would like to display the tiles in my Leaflet client and keep its original Cartesian coordinates.
I know that I need to use the Proj4Leaflet plugin to use system that are not natively supported by Leaflet.
But the problem is that EPSG:404000 seems to have no Proj4 definition.
How can I specify Proj4Leaflet to use this spatial reference?