7th Series

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Typical 7th series mapping in Surrey

The 7th Series (OS7) is a complete set of 1-inch-to-the-mile mapping of Great Britain, published by the Ordnance Survey in the 1950/1960s. The sheets may be used for tracing when their copyright lapses. Unlike the New Popular Edition, the coverage is incomplete because only a subset of sheets has entered the public domain.

The accuracy of the maps varies from much less than 20m to some upper limit error (under investigation). A group of tools, Warp-gbos, was developed to enable high resolution rectification of multiple map sheet scans.

7th Series Map Key

Using in OSM

As they become available the scans and rectified tiles can be accessed through both Potlatch, JOSM and other editors. The suggested tagging for tracing from the OS 7th series maps is source=OS7.

View Online using OpenLayers slippy map. Alternative

Potlatch: just choose "OS 7th Series historic" from the background menu.

JOSM: In newer versions, simply activate the "7th Series (OS7)" layer in the Edit->Preferences->WMS/TMS tab (for older versions you may have to add the layer using the Imagery URL-- tms:http://ooc.openstreetmap.org/os7/{zoom}/{x}/{y}.jpg). You can now select the layer when editing using the 'Imagery' menu.

(Please note the WMS layer is now dead - please update to the TMS URL.)

Merkaartor: TmsServer minzoom="6" maxzoom="14" path="/os7/%1/%2/%3.jpg" address="ooc.openstreetmap.org" name='OS 1" Seventh Series' tilesize="256"

License

You can trace as much as you like from these maps and then do whatever you like with the tracings - commercial or otherwise. For other uses, consult the "official" page with licensing information. The licensing of the images is CC BY-NC 3.0. The original OS copyright has lapsed because crown copyright has a 50 year duration [1].

National Library of Scotland Seventh Series mosaic

From March 2012, the Ordnance Survey One-Inch to the mile Seventh Series of Great Britain (1952-1961) is newly available as individual sheets at the National Library of Scotland. They are not directly accessible as OSM compatible tiles, but instead use the following code :

var layer = new OpenLayers.Layer.OSM(
  "OS Seventh Series",
  "http://geo.nls.uk/mapdata2/os/seventh/${z}/${x}/${y}.png"
  );
layer.getXYZ = function( bounds ) {
  var xyz = OpenLayers.Layer.OSM.prototype.getXYZ.apply(this, arguments);
  xyz['y'] = (Math.pow(2,xyz['z'])-xyz['y']-1);
  return xyz;
}

Please contact the NLS first before using the tiles on a public facing website.

Coverage

The map below shows the current coverage of out of copyright 7th series.

OsSeventhSeriesAvailable.jpg

Coming Soon (To a Layer Near You)

Sheet Edition Source File Assigned To Calibration File Comments on Accuracy, etc

Medium term: 1, 24, 26, 27, 33, 34, 45, 46, 47, 49, 54

Calibration Needed

Sheet Edition Source File Assigned To Calibration File Comments on Accuracy, etc

People interested in calibrating map sheets (requires human effort, linux and a large amount of RAM): TimSC, ...

Sheets Included in Layer

Sheet Edition Comments on Accuracy
5 1958, © 1958, Fully revised 1957
6 1959, © 1959, Fully revised 1957
7 1959, © 1959, Fully revised 1957
8 1960, © 1960, Fully revised 1956-58
9 1959, © 1959, Fully revised 1956
10 1959, © 1959, Fully revised 1956
11 1959, © 1959, Fully revised 1956
12 1959, © 1959, Fully revised 1956-1957
14 1958, Fully revised 1956
15 1958, © 1958, Fully revised 1956
16 1959, © 1959, Fully revised 1956
17 1959, © 1959, Fully revised 1956 Looks like there might be a problem with the St Kilda Inset. It might be substantially ENE. Chillly 20:02, 2 January 2010 (UTC)

It looks like the OS7 map is 200m out from OSM and PGS, but I suspect OS7 is actually more accurate (50m or less + survey error, I hope). I wonder if there is a way of confirming this, and possibly translate the OSM data to be more like OS7?--TimSC 17:19, 4 January 2010 (UTC)

18 1960, © 1960, Fully revised 1956-57
21 1959, © 1959, Fully revised 1955-1956
22 1958, © 1958, Fully revised 1955-1956
23 1959, © 1959, Fully revised 1956
25 1956, fully revised 1955
29 1959, © 1959, Fully revised 1955
30 1959, © 1959, Fully revised 1955
31 1958, © 1958, fully revised 1955
32 1959, © 1959, Fully revised 1956
39 1958, fully revised 1955
42 1958, fully revised 1955
43 1958, © 1958, fully revised 1955-1956
44 1955, fully revised 1954
47 1956, Fully revised 1956-1957, Minor corrections 1960
48 1956, Fully revised 1954, corrections 1959
53 1956, fully revised 1954, corrections 1958 Seems quite poor (50-100m out) on the northern edge, e.g. the Ben Lui area. Ollie 18:44, 27 October 2009 (UTC)

I estimate the errors to be around 16m in this area based on grid lines. The remainder of the error appears to be surveying error! --TimSC 19:06, 28 October 2009 (UTC)

55 1957, Fully revised 1954, Minor corrections 1960
58 1956, fully revised 1953-1954, corrections 1958 Islands of Gigha and Gighalum appear to be about 100m too far E on OS7 compared with other sources (including PGS coastline). Oddly W coast of Kintyre seems fine. SK53

The rectification error in this area seems to be ok <20m, so I suspect it is a OS surveying error, or the Landsat/PGS data is inaccurate (or erosion) (or all of the above). --TimSC 17:56, 4 January 2010 (UTC)

59 1956, Fully revised 1953-1955, Minor corrections 1960
62 1957, Fully revised 1953-1954, Minor corrections 1960
64 1955, Fully revised 1952, Minor corrections 1960
65 1955, fully revised 1953-1954 Islands of Cara appears to be about 100m too far E on OS7 compared with other sources (including PGS coastline). Oddly W coast of Kintyre seems fine. SK53

Ditto comment on 58 for this.--TimSC 17:56, 4 January 2010 (UTC)

66 1956, Fully revised 1953-1954, Minor corrections 1960
67 1955, fully revised 1953-1954, corrections 1958
72 1955, fully revised 1951-1953, corrections 1957
73 1955, fully revised 1951, corrections 1957
74 1956, fully revised 1951-1953, corrections 1957
75 1956, fully revised 1951-1953, corrections 1956
84 1955, Fully revised 1950-1951, corrections 1957
86 1955, Fully revised 1950, corrections 1958
88 1955, Fully revised 1950-1951, corrections 1957
92 1955, © Fully revised 1950, corrections 1957
100 Published 1952; Fully revised 1947-1949
126 1954, Fully revised 1952, Minor corrections 1960
129 Fully revised 1949, Published 1952
134 1954, Fully revised 1950, Minor corrections 1960
140 1952, Fully revised 1948, Minor corrections 1960
147 Published 1954, Reprinted with minor corrections 1959, Fully revised 1951
151 1952, Fully revised 1948, Minor corrections 1960
152 1952, Fully revised 1948, Minor changes 1960
154 Published 1952, Fully revised 1947-1948
157 Published 1958, Fully revised 1949-1956
166 1959, © 1959, Fully revised 1955-1956
169 © 1959 Fully revised 1956, Major roads revised 1964, Published 1959, Reprinted with minor changes and addition of ROW 1965
170 © 1959, Fully revised 1954-1955, Published 1959, Reprinted with minor corrections 1960
171 © 1959, Fully revised 1954-1955
173 © 1959, Fully revised areas 1954-1955 and 1957
184 © 1959, Fully revised areas 1954-55 and 1957

Calibration by Philip Stubbs, Andy Robinson, Tim Sheerman-Chase and Ollie O'Brien. Scanning Organised by Steve Chilton and James Rutter. If you have scans that you would like to be added to this layer and you can accept redistribution by BY-NC, please get in touch with Tim to discuss.