Suppose I have a large GeoJSON file loaded into Mapshaper. I want to convert a property to use as an ID field on export, but I don't know what the property naming schema is. The file is too large to conveniently check in a text editor.
Is there a way within Mapshaper to view available properties? I've tried using
-inspect, but you have to select one record by a property - which is hard when you don't know what the identifying property's name is! I can't find anything relevant searcing for properties in the command reference.