The Accuracy interface is used to get the GPS accuracy.
org.freedesktop.Gypsy.Accuracy
Description: Get the GPS accuracy.
Bit mask, gives fields validity.
d: pdopPosition (3-D) dilution of precision. Unitless. The lower is the value, the better is the accuracy.
d: hdopHorizontal dilution of precision. Unitless. The lower is the value, the better is the accuracy.
d: vdopVertical dilution of precision. Unitless. The lower is the value, the better is the accuracy.