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What kind of unit of measurement for scale does SQL Server 2012 Spatial use?

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As ratios of two lengths, scales are inherently unit free. Some maps describe their scales as ratios of lengths in different units (such as feet or miles per inch)--and when they do, they are usually clear about what lengths are involved. –  whuber Feb 4 '13 at 20:50
    
If I have SRID 0, the unit will be free of measurement, but how will it measure I have coordinate (0,0) to (0,5), does it calculate by pixel, raster or something? –  Gamer Feb 4 '13 at 21:52
    
As whuber pointed out, the distance between (0,0) and (0,5) is 5. It isn't 5 of any particular thing, its just 5. –  BradHards Feb 4 '13 at 22:35

1 Answer 1

As commented by @whuber:

As ratios of two lengths, scales are inherently unit free. Some maps describe their scales as ratios of lengths in different units (such as feet or miles per inch)--and when they do, they are usually clear about what lengths are involved.

In other words, the term "unit of measurement for scale" does not make sense to use.

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