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Some info on this - and also apologies for another query on an earlier topic, anyone help here?
First the info. On the 1940s 1:1,000,000 world series map no. N G 41 (Makran), 5th edition, 1944, (1st edn was 1928), covers essentially the border area of Iran/Pakistan, from the Persian Gulf, covers 60 - 66 deg east, 24 - 28 deg N, this map has a "RELATIVE RELIABILITY" inset map, showing most of the map to be derived from a "Reconnaissance Survey 1889 - 1932" ... some small irregular portions to the west are derived from a "Rigorous survey 1918-32".
This map is part of the series I queried earlier (none of the others have this "RELATIVE RELIABILITY" inset map), in email in December 2006.
Now the new query - having had sight of more of this series, from India to France, they have a strange set of what appear to be concentric lines labelled 12 degrees w, 11, 10 etc through 0 to 3 degrees east - I guess with more maps this series would extend. BUT these lines correspond to no spatial system I can imagine. They certainly aren't long / lat lines, though they 'impersonate' them. Rather the 3 degrees W line goes north-south between Italy and Sicily, swoops round S E I guess across Sudan / Somalia (not seen this) and ends up running East-west across the southern tip of India. The 2 deg east line crosses the eastern tip of Cyprus, running NW to SE, crosses the northern tip of Oman running east-west, then turns to the north east across southern Pakistan.
So there's some kind of concentric pattern of these, which I guess would be centred on somewhere in western China, at maybe 10 deg east, and the lines exist at least as far out as one in western France, here running north south, labelled 12 deg west. Furthermore, the line spacing appears to become closer in western Europe (where these lines run N-S), compared to spacing in S Asia, where they run E-W 9and run SW to NE in S E Asia, Thailand etc..
Anyone know how these lines were derived, what they were used for (the maps were, as I was kindly informed by several maphsisters, WW 2 aviators, and from a world series).
I can try and scan and send if anyione interested.
Once again, many thanks for the replies of January 2007,
Dr Hillary Shaw
School of Business, Management and Marketing
Harper Adams University College
Newport
Shropshire
TF10 8NB
School of Business, Management and Marketing
Harper Adams University College
Newport
Shropshire
TF10 8NB
-----Original Message-----
From: John Day <[email protected]>
To: Discussion group for map history <[email protected]>
Sent: Fri, 16 Sep 2011 19:13
Subject: RE: [MapHist] Looking for a map with a specific kind of reliability diagram
From: John Day <[email protected]>
To: Discussion group for map history <[email protected]>
Sent: Fri, 16 Sep 2011 19:13
Subject: RE: [MapHist] Looking for a map with a specific kind of reliability diagram
This is a MapHist list message (when you hit 'reply' you're replying to the whole list) o + o + o + o + o + o + o + o + o + o + o + o + o + o + o + o + o + o + o +
Disclaimer: I have nothing useful to add to this
discussion. ;-)
Now, let me ask a naive question: Isn't there a value
judgement being place here calling these "reliability"
charts?
Doesn't that presume that latter measurements are more reliable
than earlier ones?
I realize that this is the term that is used, but isn't this more
analogous to the "References" section of paper? IOW,
what were the sources for the data.
Sorry for the distraction.
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Content-Type: multipart/related;
boundary="----=_NextPart_000_0120_01CC745E.44C4D580"
Content-Language: en-gb
Dear Dana,
The only examples I come across regularly appear on British Admiralty charts, but only those published as of some time (sorry to be vague) around the last couple of decades of the 20th century. An exact date could be got from Guy Hannaford ([email protected]), the UKHO archivist who is extremely helpful. It is possible this is as a result of an International Hydrographic Organization standard. Here is an example:
Before that date reliability indications as to survey data were loosely noted in the chart colophon, but only in terms of the date of the most recent survey and the ship and surveyors who did it. There was sometimes a reference to previous surveys where that data was incorporated in the new chart. Otherwise indications of reliability were given by convention - e.g. for vigias. In addition, for soundings (when individual soundings rather than depth contours were the norm) a different font was used (usually italic) to indicate soundings from previous charts of doubtful reliability.
Hope that helps.
Stephen D
Dr Stephen Davies
CSSC Maritime Heritage Research Fellow
Hong Kong Maritime Museum
g/f Murray House, Stanley Plaza,
Stanley,
Hong Kong SAR,
China
Tel: (+852) 2813 2322
Fax: (+852) 2813 8033
www.hkmaritimemuseum.org
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HKMM is moving to Central Pier 8 in 2012 !
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Dana A. Freiburger
Sent: 16 September 2011 01:10
To: Discussion group for map history
Subject: [MapHist] Looking for a map with a specific kind of reliability diagram
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_______________________________________________ MapHist: E-mail discussion group on the history of cartography hosted by the Faculty of Geosciences, University of Utrecht. The statements and opinions expressed in this message are those of the author and do not necessarily reflect those of the University of Utrecht. The University of Utrecht does not take any responsibility for the views of the author. List Information: http://www.maphist.nl Maphist mailing list [email protected] http://mailman.geo.uu.nl/mailman/listinfo/maphist
_______________________________________________ MapHist: E-mail discussion group on the history of cartography hosted by the Faculty of Geosciences, University of Utrecht. The statements and opinions expressed in this message are those of the author and do not necessarily reflect those of the University of Utrecht. The University of Utrecht does not take any responsibility for the views of the author. List Information: http://www.maphist.nl Maphist mailing list [email protected] http://mailman.geo.uu.nl/mailman/listinfo/maphist
