Is it possible to directly pipe data to ogr2ogr? I'm trying to curl a GeoJSON file and pipe it to ogr2ogr to covert it to another format.
Without using a pipe, I was able to achieve this by first writing a file and then converting it using the following command, but I'm curious if it is possible to skip that step.
curl "https://raw.githubusercontent.com/nvkelso/natural-earth-vector/master/geojson/ne_50m_admin_0_countries.geojson" -o "countries.geojson" && ogr2ogr -f "KML" countries.kml countries.geojson
I also tried creating a variable with the curl output instead of piping it, but ogr2ogr was not able to read it:
DATA=$(curl -s "https://raw.githubusercontent.com/nvkelso/natural-earth-vector/master/geojson/ne_50m_admin_0_countries.geojson") && ogr2ogr -f "KML" countries.kml $DATA
Answer
OGR has its own idiom for stdin, /vsistdin/. Use that as ogr2ogr's first argument (the dst_datasource_name) and you can pipe curl's output to it:
curl "https://raw.githubusercontent.com/nvkelso/natural-earth-vector/master/geojson/ne_50m_admin_0_countries.geojson" | ogr2ogr -f "KML" countries.kml /vsistdin/
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