LAS to GeoJSON XML pipeline

gistfile1.xml

<?xml version="1.0" encoding="utf-8"?>
<Pipeline version="1.0">
    <Writer type="drivers.text.writer">
        <Option name="filename">
            output.json
        </Option>
        <Option name="order">
            X,Y,Z
        </Option>
        <Option name="keep_unspecified">
            true
        </Option>        
        <Option name="format">
            geojson
        </Option>
        <Option name="chunk_size">
            10
        </Option>
        <Reader type="drivers.las.reader">
            <Option name="filename">
                input.las
           </Option>
        </Reader>
    </Writer>
</Pipeline>