[Talk-GB] link microwave masts

[Robert Hanwell]

I think it's worth doing as reference. Data can be pulled out later for other projects? 

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On 1 Jan 2021, 11:45, at 11:45, Dan Glover <dan at dgsys.co.uk> wrote:
>On 2021-01-01 09:59, Robert Hanwell via Talk-GB wrote:
>> Ok thanks. I'm thinking updating this into the points on the map.
>> 
>> https://en.m.wikipedia.org/wiki/British_Telecom_microwave_network
>> 
>> But as it's probably no current would you still mark it on the map?
>
>This is timely, since it's a new year and time to look at things I 
>didn't finish last year...
>
>Quite a lot of data on currently licenced microwave links is available 
>from Ofcom - though under what terms I can't remember right now. I will
>
>go and find out. It is used to compile this map 
>https://carte-fh.lafibre.info//index.php?zone=uk
>
>The problem with the historical Post Office/BT sites is where to draw 
>the line. That Wikipedia article is far from comprehensive and includes
>
>schemes which were either experimental, sites long since gone, or 
>proposals - not all of the "Backbone" network was actually built due to
>
>changes in requirements.
>
>As it happens I have been (very slowly) researching the history of the 
>PO/BT network and have a work-in-progress site with what I have found
>so 
>far. Underneath it is a database of what I consider to be the main
>sites 
>but my criteria for inclusion/exclusion are a bit arbitrary. The 
>locations have been compiled mainly by using aerial photos once the 
>general locations were identified. Very few have actually been visited 
>by me and none have been independently surveyed.
>
>99% of the "legacy" sites are still used either as mobile phone base 
>stations, inter-exchange linking or for third party links (including
>for 
>mobile phone networks). So the problem becomes whether to include all 
>the currently active end-points for the BT licences, or just the 
>historical core sites, or start adding everything, everywhere (pun not 
>entirely unintentional). A lot may depend on the terms accompanying the
>
>Ofcom data. I know it suffers from the usual problems: much was
>compiled 
>using 6-digit NGRs, but some has been done to greater precision 
>resulting in the appearance of two sites near each other which are 
>actually the same, etc. A handful of sites have been redeveloped.
>
>At the moment the presentation of the pages relating to individual
>sites 
>and routes is all over the place because various things have been tried
>
>and abandoned at different stages. In particular I decided to migrate 
>from Google maps to OSM at quite a late stage and haven't yet gone back
>
>to finish that aspect. However, warts and all, it can be viewed from 
>http://dgsys.co.uk/btmicrowave/
>
>Happy to discuss further: 2021 is hopefully the year when I will 
>"finish" the project...there is probably not much more archive material
>
>to be found, though I am starting to get "oral history" from those 
>involved.
>
>
>Dan
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