In SI units. Depending on the scale, they are measured in kilometres, metres, centimetres, millimetres etc.
they are measured in AU
Long distances are measured in AU in Eve Online. For short distances, it is measured in KM.
The distances are measured from the tip of home plate to the bottom of the fence.
Usually such distances are measured either in light-years, or in parsecs.
It depends on what you are trying to measure. Long distances usually are measured in miles. Survey distances usually are measured in feet.
lightyear
Light years
Light Years
nobody
distances between cities are usually measured from the central post offices
Usually small distances. You may get rainfall measured in mm.
Germany is closer to Spain. Germany is in Europe, as is Spain. The distances are not even close.