ARCHI UK Frequently Asked Questions (FAQ)

Retrieving Your Password

If you have forgotten your ARCHI membership password click this link and enter the email address your registered with (usually the email address of your PayPal account). Your password will then be emailed to the email address associated with your subscription.

Automatic Password Password Changing Explanation

We reserve the right to automatically change a password which the ARCHI password verification system has identified as having an unusual pattern of activity, for example being used from different IP addresses at similar times.

We are aware that this may have raised alarm bells in some people, who may have been inadvertently picked up by the system.

If you are the person who set up an ARCHI subscription, there are a number of reasons why this password might have been picked up by the system. Your internet service provider (ISP) may use a dynamic IP allocation system, which triggers our alert for multiple usage. Or, if you are very mobile when you use ARCHI then the system may pick this up. This is absolutely not a problem and we encourage you to use ARCHI as much as you can to help with your research.

However, we need to protect the system from gross password sharing, which has been on the increase within the ARCHI community for a number of years now. Password sharing has a major impact on the load on the ARCHI website architecture, leading to reduced performance, reduced speed and website crashes. This isn't fair on the users who have taken out a paid subscription. Sharing with your close friend or family member is understandable but those who have been sharing with people further outside that circle has lead to an unintended explosion in over-use. Continued over-use will force us to raise the subscription prices in order to cover the costs associated with supporting these additional users who are not contributing. We feel obliged to address this now on behalf our valued paying members.

Hence, we hope you are happy that we take measures to address the problem of wide-scale password sharing with ARCHI.

Copyright Notice

All content on this website, including but not limited to text, graphics, images, and code, is the property of ARCHI Information Systems Ltd and is protected by United Kindgom and international copyright laws.

Screenshot Re-use for Non-profits

We hereby grant permission for the use of screenshots from our website for non-profit community projects or for educational establishments, provided that the purpose of such use is not for commercial gain, and that appropriate attribution is given to the ARCHI UK Website ( (ARCHI Information Systems Ltd). However, we would appreciate it if you could send us ARCH UK: Screenshot Reuse Notice how you will / have used the screenshots plus, if possible, a link to any online or print publications the images appear in.

Any other reproduction, distribution, or use of materials from this website without the express written consent of ARCHI Information Systems Ltd is strictly prohibited.

If you wish to use any content from this website for commercial purposes or for any other use not expressly permitted by this statement, please contact ARCHI Information Systems Ltd to obtain permission.

Thank you for respecting our intellectual property rights.

Map Attribution

ARCHI uses data from various providers. You are welcome to make fair use of screenshots of the maps generated on the ARCHI website for purposes such as news and magazine articles, TV programmes, corporate presentations, survey reports etc., in either electronic or print format, as long as any image is accompanied by a mention of the ARCHI website, its web address ( and the attribution statement of the provider(s) whose data appears in the screenshot.

Map Attribution Example

Something on the lines of:

Lidar of Housesteads Roman Fort (Vercovicium) Haydon Bridge, Northumberland, NE47 6NN

[map series eg LiDAR] Screenshot from the ARCHI MAPS UK website at; LiDAR tiles © Environment Agency copyright and/or database right 2022. All rights reserved.

Old Maps: © ARCHI Information Systems Ltd 2023. All rights reserved / © National Library of Scotland

LiDAR: © Environment Agency copyright and/or database right 2022. All rights reserved.

Basemaps: © Google / Openstreetmap

would be acceptable together with an attribution statement for the particular provider.

It would be appreciated if you could also let us know when you have made such use of the data and mapping resources presented on our website as we do have more maps in our archive which are not yet on the website. So, we may additional maps of your research area but not yet on the ARCHI MAPS UK website.

First Edition Ordnance Survey 1 inch to 1 mile map layer (1805-1845)

Regarding our 1st edition OS 1 inch map layer (1805-1845), you are again welcome to take screenshots of the membership-free lower resolution imagery currently available on the website. Full high-resolution versions of 1km square sections of this paricular map layer are available upon request.

Contacting Us

ARCHI is an web-based only service. If you wish to contact us, please click one of the following options and send a message with details of your query. Please bear in mind we are a small business with limited resources but we still aim to respond to your query within 3 working days. However, in practice our response time is usually much sooner.

Ordering Prints / Digital Images of Old Maps on the ARCHI website
First Series Georgian / Victorian Ordnance Survey (OS) Old Maps: 1 inch to 1 mile (1805-1869)

These maps freely available on the ARCHI website and don't require a subscription to access them.

For more information on taking out an ARCHI MAPS UK Subscription, please go to our ARCHI MAPS UK Subscription information page.

If you have any other queries relating to this particular series of maps, please email us using the link here Ordering 1" First Series Prints / Digital Images of Old Maps on the ARCHI website

First Edition Victorian Ordnance Survey (OS) Old Maps: 6 inch to 1 mile (1888-1913)

Our license doesn't allow us to sell digital images, offer download facilities or prints of this series of old maps. You can buy them from the National Library of Scotland though.

To do this just do the follow these steps:

  1. Go to the ARCHI MAPS UK home page.
  2. In the Search Form enter the name of the location you are interested in. There is no need to enter a password.
  3. At the top of the ARCHI search results you will see the icons linking to the different map series available on the website.
  4. For the OS 6" First Edition Series, click the corresponding icon ie the one to the right of the entry for 'Early 6 inch Old Historical Map (1888-1913)'
  5. On the resulting page you will see the sentence:
  6. Maps generated from ARCHI UK Search and this map can be purchased from the National Library of Scotland's Mapping Service.
  7. Click the link to the 'National Library of Scotland's Mapping Service'.
  8. When you see the map on the NLS website, click the 'View this Map' link.
  9. When you see the map you wish to purchase (either print or digital), click the 'Order this Map' button.

If you have any other queries relating to this particular series of maps, please email us using the link here Ordering 6" First Series Prints / Digital Images of Old Maps on the ARCHI website

Logging into the ARCHI System

There is no formal login procedure with the ARCHI service. Instead, once you have set your password, just enter it into the 'password' field on the various ARCHI Search forms on the ARCHI website.

This is to make is easier to comply with future data protection legislation. This actually makes things quicker and easier for you and helps to protect your rights to privacy on the internet.

Fair Use Policy

We run a fair use policy and ask you to not share passwords please. 'Fair Use' of the ARCHI system is 300 searches per individual subscription from a maximum of 15 different IP addresses. These figures are based on tripling the historically average number of annual searches per user (100) from an average of five different IP addresses per user.

The ARCHI System is able to detect potential abuse and scraping attempts. We reserve the right to block access to the ARCHI databases if potential abuse is identified.

However, it is recognised that some users will go over the Fair Use Quota.

Cancelling Your ARCHI Subscription

As we do not have access to your PayPal account, please follow the instructions below to cancel your ARCHI subscription.

  1. Log in to your PayPal account at PayPal
  2. Click Settings near the top of the page
  3. Depending upon your version of PayPal, either click Payments or select Pre-approved Payments which is under Payment settings
  4. Click Manage pre-approved payments
  5. Select the merchant whose agreement you want to cancel
  6. Click Cancel or Cancel automatic billing and follow the instructions
  7. Confirm your request to finalise the cancellation

If you are still unable to cancel your ARCHI subscription please email us using the link below. Don't forget to let us know the name used to set up the account and postcode if possible. This will help us locate your account Please Cancel My ARCHI Subscription

ARCHI UK License Agreement

License: Personal, non-commercial or educational use for a single user only. Block subscriptions can be purchased for Schools, Colleges and Higher Education Academic institutions and the subscription rate depends upon the number of users. See below for more information on multiple user subscriptions.

Please contact us via e-mail at if you wish to purchase a block subscription.

Payment by Mail Order

We do accept cheques or postal order for £41.50 + VAT and made payable to "ARCHI Information Systems Ltd". Email us for more details.

How accurate are the locations / co-ordinates of the archaeological / historic sites listed in the ARCHI UK datbase?

More than 85% of the sites listed in the ARCHI UK database are accurate to 6 or more figures in the UK National Grid Referencing System (eg TL 065 0227). This is the accepted accuracy for archaeological reporting with respect to the publications (eg journals, books and archaeological reports) the data has been sourced from. A 6 figure co-ordinate means that the site/find will be within the 100 metre square referenced by the co-ordinate.

As an example, consider the Priory site at TL 065 0227. On the map the marker is right on the site. However, be aware that if for example a coin is geo-referenced to 6 figures, then the coin would have been found in the 100 metre square indicated by the co-ordinate of the find.

What does it mean when a map marker pop-up says that the marker is a four figure NGR (National Grid Reference)?

A four figure grid reference (eg TQ 12 34) means that that the actual archaeological site or findspot is within 1km of the place marked on the map. The reason for this lower than normal site/find-spot accuracy is because the data relating to the site is likely to have been published in a very old report, when it was only thought to be necessary to record sites and find-spots to the parish level.

Hence, when a site record or map marker pop-up states that the source data was a 4 figure co-ordinate please be aware that the markers just marks the centre of a 1km square and the site or find is within that 1km square and not that exact point in a field.

Going further into the old practice of recording sites/finds to the nearest parish or place-name associated with a find / site's co-ordinate, this is actually an extrapolation from the place's co-ordinate which is cross-referenced with the ARCHI database of place-names. Hence, in some cases a site may actually be in a particular parish but because the centre of a neighbouring parish is closer, the site is 'tagged' with this place-name. Again this is because many of the sites and findspots were just recorded as co-ordinates in the original publication and the place-name has had to be calculated in order to give some measure of locational context.

How Can I Narrow A Search Down to a Smaller Area (eg 5km or 3km)

You can use the ARCHI Advanced Search to narrow down your search area. You can access the Advanced Search by clicking the link to it at the top of the Quick Search form on the ARCHI home page

How do I Find the Bibliographic Source / Reference of the Information for a Particular Archaeological / Historical Site

The bibliographic sources for each of the sites and monuments listed in the ARCHI database used to be included in the sites lists but these were taken out a few years ago because we had a number of complaints with respect to the amount of viewable data on a screen on mobile devices. However, we have revoked that decision because many people have asked for them to be re-instated. Hence, we are now in the process of re-instating them but this takes time because the ARCHI data needs to be reconfigured and code re-written. As regards finding more about these sites, once the bibliographic sources have been merged with the sites data, the entries in the site lists will contain references to where the GPS location of the sites originated from plus where to find more information about these sites.

On the Maps of Archaeological Sites, is the resolution of the marker positions based on the grid locations (typ +/-50m) or the lat/long (more decimal places)?

All the locations in the ARCHI UK database are held in the British National Grid Format. At least 85% are to 3 figures or more (many to 4 or 5 figures). Regarding the decimal lat/longs, these are all extrapolations from the NGRs with the heart of the code referencing methods associated with the Herlmert transformations ie they are of the same accuracy as the National Grid References they were extrapolated from.

Also, there is the problem of extrapolation from NGR to decimal lat/long and the inherent inadequacies associated with the translation. All the data in ARCHI is held as NGRs but plotting on the the maps requires translation to decimal lat / long.

Regarding the place-name associated with a find / site's co-ordinate, this is actually an extrapolation from the co-ordinate which is cross-referenced with my database of place-names. Hence, in some cases a site may actually be in a particular parish but because the centre of a neighbouring parish is closer, the site is 'tagged' with this place-name. Again this is because many of the sites and findspots were just recorded as co-ordinates in the original publication and the place-name has had to be calculated in order to give some measure of locational context.

If I make a donation, can I access the ARCHI archaeological site GPS locations databases

The donation buttons are generally used by people who would like to make a contribution towards the costs of providing the free services on the ARCHI website. These free services are access to the British Ordnance Survey old maps, Antique Old Maps, ARCHI UK Place-Name Finder, ARCHI Wordwide Archaeological and Historical data and maps and other free archaeological and historical research services on the ARCHI website. You do not have to make a donation to access these services but it is very much appreciated if you do as there are significant costs to cover for us to provide these free services.

Access to the UK archaeological sites GPS locations and maps does require the purchase of a subscription to the ARCHI UK database, which is currently £42.50 per year.

Click here to return to ARCHI UK's search page.

Individual Subscription Pricing

For individuals, the cost of a year's subscription to the ARCHI UK database of UK Archaeological Sites is £42.50

Educational Institution Subscription Pricing

Multiple access to ARCHI UK is open academic institutions and the yearly subscription rate depends on the size of the faculty and the projected number of users.

Academic (University) online subscriptions start at £225 per annum.

School online subscriptions start at £41.50 + VAT per annum.

Institutions have the choice of accessing the data via a password or automatically through the institution's IP address(es).

If you would like your group or institution to subscribe to ARCHI UK then ask your librarian or representative to e-mail us at

We accept payment by PayPal, Bank Transfer or by Cheque.

Auto Re-Subscription

A subscription to the ARCHI UK and ARCHI Worldwide databases are for one year and will be renewed automatically. Most ARCHI subscribers prefer this than to find their subscription has expired when they are out in the field and need to use the service.

However, you can simply cancel any future re-subscription payments via your PayPal acount anytime before the next subscription period.


Access to the full database is immediate if you subscribe online using the PayPal payment system. Otherwise your subscription will be activated within five working days after the time we receive your cheque payment.

Fair Use Policy
ARCHI Services

Please ensure you have read and understood our Fair Use Policy, which forms part of the Prepay Terms and Conditions, Pay Monthly Terms and Conditions and Business Terms and Conditions (as applicable).

  1. All of the Services are subject to the Fair Use Policy.

  2. Your use of the Services must be fair, reasonable and not excessive, as reasonably determined by us by reference to average and/or estimated typical customer usage of the Services. We will consider your usage to be excessive and unreasonable where it materially exceeds the average and/or estimated use patterns over any day, week or month (or other period of time as determined by us) (Excessive Usage).

  3. Where we offer any included Services under a Plan or other Service, such use is offered for your individual private and personal use and benefit only. In no case does any Service allow for activities aimed at making profit or reselling the Service or using the Service in an unfair or excessive way and any such use of the Services by you is a breach of this Agreement.

  4. If in our reasonable opinion we consider your usage to be unfair, unreasonable and/or Excessive Usage we may immediately suspend, modify or restrict your use of the Services or withdraw in full or in part your access to the Services without notice to you.