A little information about the GeoJSON
format:
GeoJSON : This type of media is intended for GeoJSON applications
that currently use media types
"application / vnd.geo + json" or "application / json", of which there is
several categories: web mapping, geospatial databases, API
geographic data processing, data analysis and services
storage and dissemination of data.
But currently using for files GeoJSON
a MIME TYPE
:
application/vnd.geo+json
is obsolete .
This is the statute:
The media type for GeoJSON text is "application / geo + json" and
is registered in the "Media Types" record described in
[RFC6838] . The entry for "application / vnd.geo + json" in it
record must change its status to be "OBSOLETE" with a
pointer to the media type "application / geo + json" and a reference
added to this RFC.
therefore should be used :
application/geo+json
or
application/json
This is the current list defined by the IANA:
link