there is track width (measured from mid rail to mid rail) and track gauge (measured from inside rail to inside rail. As that is the most important size of track, that is normally the distances referenced to. normal distance for track gauge is 1435 mm
road distances are generally measured from town halls. A noticeable exception is 'le point zéro' in Paris, a brass marker just outside Notre-Dame cathedral, from which distances are measured to other French towns.
Any distances between two points outside the solar system, or betweenanything inside the solar system and anything outside it, are.(With the exception of the distances now being estimated between exoplanetsand their respective host-stars.)
they are measured in AU
Long distances are measured in AU in Eve Online. For short distances, it is measured in KM.
Usually such distances are measured either in light-years, or in parsecs.
Usually small distances. You may get rainfall measured in mm.
The distances are measured from the tip of home plate to the bottom of the fence.
It depends on what you are trying to measure. Long distances usually are measured in miles. Survey distances usually are measured in feet.
The brass marker outside Notre Dame de Paris is the official centre of Paris, from which all road distances are measured.
the outside horse
No. Short distances (the width of a planet) are measured in kilometers. Distances from one place to another in our solar system are measured in Astronomical Units (AU), one AU being 93 million miles. Longer distances outside our solar system are popularly measured in light years, Alpha Centauri is 4.2 light years away, for example, but note I said "popularly". Astronomers use the term "parsecs" when speaking of interstellar distances (one parsec is 3.26 light years).
Bolted on the outside of the frame rail.Bolted on the outside of the frame rail.