Explanation of Entries within Cartobibliographic Database

The form of the entries in the database

These entries are based on those of Kingsley "Printed Maps of Sussex" [King82]and Burden "Printed Maps of Berkshire" [Burd88] with a few minor amendments.


In order of preference: the name, if known, of the surveyor of an original survey, draughtsman, engraver or first publisher - in certain cases a generally accepted source is used.


That which appears on first edition of map or if undated the year of its first publication; in the absence of these an estimate is used indicated by a '?'.


In mm, height followed by width, measured from the inside of the innermost border (this allows for any potential trimming) - allowance should be made for paper shrinkage (upto 2½% ?).
The size of any border is given thus: (9) - single line thicknesses as 'line' etc.

Representative Fraction:

Derived from a measurement of Point of Ayre to Spanish Head & Douglas Head to Contrary Head. On a 1:50,000 O/S these distances are 971mm and 365mm and can thus derived by simple ratios.
Maps derived from Speed tend to exagerate the N-S distance (by around 20%) and thus the choosen value is a compromise weighted 3:1 NS:EW. Maps derived from Fannin slightly exagerate the E-W by 8% - again the same compromise value is generally used.
For some maps the distortion is too great and an indication of approximate fraction is given.


The shape of the island is a good indication of the date and derivation of the map. Some seven basic shapes based on original surveys can be recognised: Collins map was used by Moll which in turn was used by Kitchin in his several maps and derivatives. The Smythe is somewhat more rounded at Jurby Pt than Fannin; a more accurate shape was produced by Mackenzie in 1779 which is very similar to the O/S but unfortunately Fannin's rather distorted shape was generally adopted.

Discursive Section

Gives Biographical and other Notes on the personalities and editions.

Title on Map

A copy of the wording, generally ignoring any case information e.g. ISLE of MAN would be rendered Isle of Man.

Description of Map

Reference Grid

For the purposes of locating any feature the map is split into index squares thus:


























The position of any large or lengthy feature is taken from its centre


The actual wording on the scale bar is reproduced (if none then given as 'Scale' prefixed to length of scale bar in mm).
Number of miles marked on the bar is stated; 1+ 10 indicates a total length of 11 but the zero is 1 mile from the left.


This is used for any form of compass indicator.

Longitude and Latitude

When marked on the map these are recorded in form: longitude [4:90-4:10]10/1 and latitude [52:30-53:60]10/2 which indicates that the map covers between the given values, longitudes are marked every 1' and values indicated every 10", latitudes every 2' with values indicated every 10". Note that the ranges are generally estimated and not indicated on map.

Graticule and Grid

Noted if present.


After 1873 the indication of railways offer a convenient way of dating - any railways shown are noted; refer to the section on dating maps for details re lines etc.

Editions and Lithographs

The ordering is in terms of states (changes to the plate of an engraved map) and Lithographic transfers. These are distinguished by numeric and letter suffices e.g. 95(2) would indicate 2nd state of map index number 95 whilst 95.B would indicate the second lithographic transfer. Following these is a list of works in which the map was present - for many of these a pressmark is given in some public library (e.g. Manx Museum, British Library, Royal Geographic Society) as {pressmark}. Reference to the map and/or atlas in a number of standard works is also given. Example The following figure illustrates the approach: Title: ISLE of MAN Size 200x180;border (double line 9mm); Scale 'Miles' 10 O/S shape N to top; Ab:Title in ornate script Eb:Compass De:Scale Ae(ib):'published..' De(os):'Imprint'


see separate page


Any comments, errors or omissions gratefully received The Editor
© F.Coakley , 2008