-------- Original Message --------
Subject: Betr.: [Fwd: 10 degrees, or 156 1/4 leagues]
Date: Mon, 03 Feb 2003 07:39:13 +0100
From: "Jan Smits" <[log in to unmask]>
To: <[log in to unmask]>, <[log in to unmask]>,
<[log in to unmask]>
------------------
Dear Jessica,
on the webpage 'Mathematical data for bibliographic descriptions of
cartographic materials and spatial data' on
www.kb.nl/kb/skd/skd/mathemat.html part is devoted to the phenomena
'mile' and 'league'.
Under the heading 'Bar scale values' the following advise is given:
Trying to give scales for pre-1800 maps implies always 3 to 4
measurements and should result in
phrases as 'Scale varying from [ca. 1:7,400] to [ca. 1:8,400]' when
derived from measurements on
modern maps. Or 'Scale [ca. 1:7,900], measurement derived from scale bar
(900 rods = 33 mm)'.
When the scale bar is not used in this way its mention should be
relegated to the notes.
I advise curators and editors of facsimiles to be careful with scales
and never to use one scale
denominator when the map does not have a geometrical basis based on
triangulation. When the
cataloguer is not sure it is better to state 'Scale unknown' and give a
scale-bar note than giving a
quizzing approximation with which nothing can be proved or which creates
confusion.
I hope this will answer some of your questions.
With kind regards,
Jan Smits
Jan Smits
Koninklijke Bibliotheek, National Library of The Netherlands
P.O. Box 90.407
NL-2509 LK Den Haag
The Netherlands
tel: +31 70 3140241
fax: +31 70 3140450
E-mail: [log in to unmask]
E-mail: [log in to unmask] (when the above does not function)
Past-President Groupe des Cartothecaires de LIBER (GdC, European Map
Curators Group) 1998-2002
Chairman Working Group for Mapcuratorship, Dutch Cartographic Society
(NVK)
IFLA Representative for the ICA Spatial Data Standards Commission
Secretary Dutch Commision for Cataloguing & Indexing FOBID (Federation
of Organizations working in the Library-, Information-, and
Documentation-field)
WWW-maps: http://www.kb.nl/kb/skd/karto-en.html
WWW-GdC: http://www.kb.nl/infolev/liber/intro.htm
WWW-personal: http://www.kb.nl/persons/jan-smits/homepage.htm
Na matheis kai na matheis ap'tous spoudasmenous
(To learn and again to learn from those who know)
>>> [log in to unmask] 31-01-03 23:13 >>>
-------- Original Message --------
Subject: 10 degrees, or 156 1/4 leagues
Date: Fri, 31 Jan 2003 13:19:27 -0500 (EST)
From: Jessica Kilfoil <[log in to unmask]>
To: Johnnie Sutherland <[log in to unmask]>
------------------
hello.
if any map catalogers could help me on this one, i'd really appreciate
it:
we have several reprints and adaptations of 16th century italian maps &
i
am having a problem calculating scales from scale bars in which the
scale
unit is presented in "leagues". none contains a complete verbal scale
statement. i don't know what to do with the leagues/leghe/legha.
so my questions are:
1) can anyone provide a conversion chart (or a citation for one) showing
a modern distance equivalent of a 16th century italian league?
2) may i transcribe the graphical distance into a verbal scale statement
("[1 in.] = 50 leagues")?
3) may i calculate a "Scale [ca. 1:whatever]" based on a nice latitude
bar
that runs up the side of each map? (all maps show moderate latitudes, as
we collection only north carolina subjects).
any assistance would be greatly appreciated!
thank you all!
jessica
_____________________________________________
Jessica M. Kilfoil
Catalog Dept.
North Carolina Collection
CB #3930
University of North Carolina
Chapel Hill, N.C. 27514
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