UNITS Attribute in LAYER Section

[Christian Wilmes]

Hi All,

does anybody know why there is an UNITS Attribute in the Layer Section? I could not find anything applying the UNITS Attribute in the Layer Section in the documentation on the mapserver-Homepage. 
So I tested different UNITS in Layers of my C#-Mapscript Project, but the map I got back from the Mapserver seems to be the same every time.

Best Regards
Christian
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