Kathleen,
Though
I have never actually come across this problem myself, I can tell you what my
inclination would be.
I
would probably do something like the following:
x
represents the correct scale
y
represents the incorrect scale
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255 Scale [ca. 1:x] not "y"
500 Map scale inaccurately marked on
map. (or something like that just as a visual
note.)
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I get
the 255 field by using Chapter 8 in the Map Cataloger's manual where it
says:
Mathematical Data Area
Since the scale of an item directly affects
its use and since the scale of a photocopy may differ from that of the
original, due to reduction or enlargement, any scale statement on the item
should be verified (e.g., by measuring a bar scale, using degrees of latitude,
etc.) whenever possible.
As with other types of items, no searching is done
to determine the scale if it is not stated, but, if the scale statement
reproduced from the original or stated in accompanying material is found to be
inaccurate for the photocopy, that information is quoted as negative
additional scale information.
EXAMPLE
Scale [ca. 1:710,000] not
"1:500,000."
Though the above section deals primarily with reproductions and
photocopies, I think that interpretation could probably be stretched to cover
your current situation. The 500 field, I would include primarily
as a visual signal for those users who tend to skip straight to the notes.
But like I said, this is just my inclination. If anyone else has
any idea, I would enjoy hearing them.