Placemark supports a wide variety of standard geospatial data formats, and a few different ways of importing them onto the map.
To import a file you can:
You can import multiple files by dropping multiple files on the map, or selecting multiple files through the Open…option! You'll need to click-through the Import dialog for each file, just in case a particular file has different import options.
Need a file format that isn’t supported, or having issues with importing a file? Get in touch via the community or support channels.