Here is a robot that can mark a full soccer field in about 27 minutes. The TinyLineMarker Sport has a lightweight design and can be easily set up to paint sports fields with less manual work. With the TinyLineMarker tablet, you access and customize templates, save fields for future seasons, and resize/move fields instantly.
This robot can hold up to 5 liters of paint. It lasts up to 5 hours on a single charge. It operates at 0.7m/s speed.