Digital mapping information and guidance

Page under development but feedback is welcomed

Digital Maps

The mapping system I use is purchased from Memory-Map( My choice of Memory-Map is not intended to be an endorsement of their product at the expense of the other vendors, it is simply my personal preference for their user interface and the range of maps available from them which includes their Historical Series of 1" OS maps from the 1800s, 1900s, 1920s and 1940s. Digital Ordnance Survey maps are available in the same scales as paper maps in the shops (1:25,000 Pathfinder, 1:50,000 Landranger and smaller scale road maps with a few extras only available in digital format (such as 1:10,000 StreetView map). The cost is greater than paper mapping, but offers more functionality and selectivity (no more edge of map syndrome as you chose your own areas which can be extended seamlessly. Map areas can be bought in small chunks, so the investment can be spread over time and does not need to be huge provided your interests are limited in geographical area. The ability to define a location to within a few metres, to mark it, and to add annotations is very useful.

Digital Ordnance Survey maps themselves are subject to copyright, so I cannot make them available or even display significant portions here, but the overlays containing the sites of interest are my own creations, and as copyright holder, I am free to publish these.

If you wish to display the overlays, you must buy your own digital mapping first.

Only a very small illustration is shown below to avoid copyright infringement.

Other vendors of digital mapping include:

Anquet Maps (

TrackLogs (

SatMap (maps on SD cards for use on their proprietary handheld device) (

Unfortunately you cannot mix and match maps from different vendors, so you need to look at each vendor's free demonstration to decide what best suits your needs and preferences. The main differences lie in the user interface and range of maps available, so personal preference should guide your choice as they all offer standard 1:25,000 and 1:50,000 scale OS mapping. Three of the four products listed are not tied to the vendor's own handheld devices.

The Overlays

On the Memory-Map system, the overlays present their information as small symbols, each of which has a properties sheet which can be opened to view the data. The data includes the British National Grid position and a comments field where I may mention significant historical detail, dates, alternative names for the site, minerals extracted, source of information, etc. I have not been able to test how much information can be visualised when the GPX versions of the overlays are loaded into the maps from vendors other than Memory-Map. The main symbols I have used on the overlays are standard symbols from Memory-Map and include:

Flag Flag Site of interest (e.g mine, quarry, china clay pit - its label may switched on or off at will)
Blue dot Shaft or adit mouth (named if the information is available)
House Building or associated facility (e.g engine house, stamps house, smelting house)
Route Tramway or railway associated with the site of interest
(sometimes a lode outcrop may be indicated by a route)

For most of the sites, the flag labels are displayed (the label can be switched on or off in the properties sheet) others are switched off to avoid overcrowding the map in areas where there was much industrial activity. If a symbol appears without a label, the label can be temporarily displayed by holding the mouse pointer over it. The label may be switched on long-term by clicking the box on the properties sheet which is opened up by double clicking the flag symbol. In areas of high activity such as Camborne, Cornwall, the map is crowded even at 1:25,000 scale and the 1:10,000 StreetView maps can be useful even though they do not show any topographical (relief) data - they have the added advantage that they can be downloaded free of charge once you have bought and downloaded your first Memory-Map product from the Digital Map Shop.

PLEASE NOTE: The overlays are based on my interpretation of old maps, manuscripts and other documentary sources including hand drawn sketch maps whose accuracy I am not in a position to verify, so I can offer no guarantee of accuracy and there will inevitably be many omissions.

Nevertheless, I hope you will find the overlays useful.

I offer the overlays free of charge for non-commercial research purposes, but if you find them useful and would like to offer a voluntary donation direct to the Treasurer of one of the charitable societies which support research in mining areas, I would be grateful.

Examples of such charitable societies would be: The Trevithick Society, The Northern Mine Research Society, or The Peak District Mines Historical Society

PLEASE NOTE: The societies mentioned above do not endorse my work, and have no responsibility for the content of this web site. The data has been gathered and compiled by me alone with no support from any third party, therefore I am the only person who can answer queries relating to this web site (contact details at the foot of this page).

If you wish to use the information for commercial purposes, please contact me .

Example map with overlay

Fowey Consols Mine.

The sample above is a screen shot and lacks the active functionality of the Memory-Map application.

The properties sheet for the Fowey Consols flag........

Upon request, I can export the overlay objects as a comma separated variables (.csv) file which can be read into a spreadsheet which displays the data as a list thus...

WP04 50.12916 -5.68794 10 Boscean Mine Includes+Goldings+Mine%0d%0aSn  
WP04 50.119984 -5.653285 10 Balleswiden Included+Davy+Shaft+Mine+and+Hobboys+Mine%0d%0aSn+Cu  
WP04 50.129891 -5.699874 10 Boswedden Mine Previously+Wheal+Call+or+Cole.+Includes+Wheals+Castle%2c+Williams%2c+Praze+and+Yankee+Boy+Mine.%0d%0aSn  
WP04 50.142317 -5.690075 10 Grylls Bunny aka+Grylls+Bonny  
WP04 50.139845 -5.690024 10 Botallack Mine Includes+Wheals+Cock%2c+Crowns%2c+Carnyorth%2c+Botallack+and+Parknoweth+as+well+as+small+mines+such+as+Wheals+Bal%2c+Hen%2c+Tolvan%2c+Button+and+Hazard.%0d%0aMany+minerals+including+Cu%2c+Co%2c+Bi%2c+Pb%2c+Zn+Fe%2c+Mn%2c+As%2c+U%2c+Ag  
WP04 50.152384 -5.682852 10 Levant Mine Latterly+included+Spearn+Consols%0d%0aSn+Cu+As  
WP04 50.148095 -5.681958 10 Higher Bal aka+Higher+Levant+Mine+on++OS+maps  
WP04 50.146393 -5.680801 10 Spearn Consols Amalgamation+of+Spearn+Mine+%26++Spearn+Moor+Mine.%0d%0aLatterly+included+in+Levant+Mine+sett.%0d%0aSn+Cu+As  
WP04 50.146892 -5.68649 10 Spearn Moor Cu+Sn+As  

In .csv files the position is given in WGS84 latitude and longitude format rather than British National Grid - sadly I have no control over the output format. Spaces in the notes are replaced by the + character, and there are other anomalies, but the content is just about interpretable.

CSV files can be loaded into a spreadsheet and manipulated. Phil Brady offers an Excel add in which can be used to convert WGS84 latitude and longitude data to British National Grid references as well as other manipulations of cartographic data.


References used in the compilation of the overlays

Overlays in Memory-Map format

Overlays in GPX format


Comments and questions may be addressed to I canot guarantee an instant reply but will respond as soon as possible.