I have gone to great lengths to ensure that any elevation data used in edits is copyright compliant and try where I can to source information from direct "on the ground" information (gps, survey, noticeboards, tourist guides, rambling groups). In this instance I took a random walk to the trigpoint and used GPS, rounding up to 170m, the closest to actual height as OSM dosen't display exacting decimal points as displayed on GPS reciever. I apologize however that my changeset comments are too vague in these instances and will explain future edits in more detail.

Hi, I used Bing and OS OOC for location, the elevation was from a notice from a local walking group displayed in nearby Priest Weston which I saw on a recent visit to the area.

I shall try and find a picture, it seemed to be a fairly new one on one of the trails. Have seen those stylised route plan ones too.

Hi, the elevation was mentioned on a tourist information board explaining sights of interest along the cycleway that passes the site. OOC maps and Bing aided in getting the location right on the map.

Hi, yes I did ask permission to use the information, I explained it was for the purpose of using in OSM and was given permission to use the data under a different licence, the Open Data Open Database Licence (ODbl) as I was explained that this would be the best way to make it compatible with the attribution constraints of OSM. They said usually Creative Commons licences are acceptable for most purposes but I suppose its the guarantee of onward attribution thats the sticking point on that licence. The said for me to email back if any further issues. Imports certainly do seem to be a legal minefield!

I shall recheck the licensing information related to the data to be sure. I am aware that it must meet OSM's import and licence criteria and thus cannot contain any OS derived data unless from OOC maps. I will also correct the location, I thought to add this seeing as it is a named hill and so could be good to have on OSM, and the highest part of ground tagged as the summit, though the term 'peak' might be stretching it

Hi, I have recently visited this area and thought to make a survey. The hill here is small but is listed in British hill databases along with name and elevation which I have then corrobarated using GPS. The trigpoint is still present and does further add elevation information. I will check again however to make sure all is correct

Hi, ahh ok, thanks for that. I was curious as to which one was correct. Shall correct it. Yeah I imagine it is like the "of" in English.

Hi, I didn't actually realise I had moved this one. Apologies there, shall correct that

Hi, I had seen both versions on a number of sources, the latest being from an old signpost. I shall enquire further into the most appropriate grammar use here. It could be a case of spelling changing slightly over time but will check

Yeah Bart's has "Black Mountain" and NLS 12:5K 1st Series has "Twyn Llech" listed for the mountain ridge from what it appears. This point is the highest summit. Will find out what the signange on the ground say's. Both names are commonly used from what I can see, however "Twyn Llech", which is probably the original Welsh name, is used more nowadays to avoid confusion as you have "The Black Mountains" to the west and "Black Hill" immediatley to the east.

I will take a look and see how it is on the ground there, From what I can remember when last on the road in that area it is fairly prominent but will see how much of the original hill is left from closer up

The quarry does indeed comprise of most of the hill here, the old summit cairn still remains however in a small area near some old footpaths/tracks a few meters from the quarry edge. It is still listed as a named hill, though understandably it could be a debatable one

Hi, the name Black Mountain, and Twyn Llech are from OS OOC maps and are the English and Welsh names respectivley with both in common use for this peak which is why I used the hyphen. Apologies there as your right in that I should choose one as the primary name and the other as the secondary language name rather than add both as primary which I shall do in future

Hi, I have spoken with the publishers about the data and the copyright issues surrounding its use in OSM. The elevation data used in the database was collected by surveying teams using GPS equipment of the organization itself, rather than from second hand data from OSGB. I'm aware that many databases of a similar nature aquire their data in this way, especially the smaller ones and as such was careful in my choosing of source material for OSM uses to avoid copyright trouble. Other information such as names and many of the elevation details are freely available on sources such as NPE /Provisional 1:25K maps as well as the database which colates this information into a readable database. The publishers are happy for data to be used in OSM, I have included an attribution addendum in changeset comments where I have used this data anyway (mention of the publishers title and website link) which is the preffered attribution method mentioned on the website in line with the licence. From feedback ive had from further enquiries within OSM, the main thing has been, as you mentioned to avoid OSGB data and derivatives and ask questions to the data publishers on where the source material they use originates, as well as their own licence requirments for use within OSM.

Hi, I have looked more into the licence issues on the source, Haroldstreet takes its data from the Database of British and Irish Hills and and credit for that data would be to them. As for the DoBIH, the downloads section of the website by the licence information states that the preffered attribution for use of their data is a mention that it is them the data orginated and a link to the website of which I am adding to the changeset comments. I have just this afternoon emailed them also for further clarification and will contact the wider OSM community for advice on future edits from outside sources

Hi, I added this as am familiar with the area and live locally but yes I agree that more valuable things do also need mapping locally. Shall have to get surveying :)

Hi, I mentioned on the Bwrdd Arthur changeset that it is the combined database of all named British and Irish mountains and hills.

http://www.hills-database.co.uk/index.html

I have checked the licence status of the information and it appears to be under a free to use/distribute CreativeCommons licence. Haroldstreet.org.uk is a website that uses this information for the benefit of walkers and "hill baggers" as it provides accurate GPS derived locations as well as the names and elevations of hills and mountains. OS OpenData also derives names etc from these listings, I have tried to be as thorough as possible in including info for validity

Hi, they are the lists compiled by various surveyors and surveying groups over the years that together form the database of all named British and Irish mountains and hills. I have checked the licence status and it appears to be under a free to use/distribute CreativeCommons licence. In the listings Bwrdd Arthur appears to refer to the hill on which the fort stands as well as the ancient structure itself. The listings also note the elevation data which I have added also