New answers tagged ordnance-survey
There is another option than converting in QGIS, which is to add the CRS property to the GeoJSON before uploading to CartoDB, see the GeoJSON spec. This means you need to convert you GeoJSON to a feature collection, which may be of use anyway, if you wish to upload more than one geometry. So, at the start of your GeoJSON, you put the CRS of EPSG:27700 (the ...
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