  Nitrogen vacancy centres in diamond can be used for vector magnetometry. In
this work we present a portable vector diamond magnetometer. Its vector
capability, combined with feedback control and robust structure enables
operation on moving platforms. While placed on a trolley, magnetic mapping of a
room is demonstrated and the magnetometer is also shown to be operational in a
moving van with the measured magnetic field shifts for the x, y, and z axes
being tagged with GPS coordinates. These magnetic field measurements are in
agreement with measurements taken simultaneously with a fluxgate magnetometer.
