Re: [Talk-gb-midanglia] Marker Posts
On Thu, Oct 13, 2011 at 1:28 PM, Nicola Smith wrote: > Hi All, > > I appreciate it is something we don't necessarily map, but has anyone seen > any gas/oil marker posts on their travels? I am interested in the > sub-surface layout Me too --- I've been mapping quite a few powerlines, and would like to get pipelines but haven't managed to spot many. > and wonderered if anyone had seen any markers that they > could let me know about. I noticed something on the road going north-east from Six Mile Bottom (maybe around http://www.openstreetmap.org/?lat=52.1985273063183&lon=0.28215765953064&zoom=18 but I can't remember exactly), I think it was a white-and-orange banded post; I've been meaning to go back and investigate. There's a gas compressor station fairly nearby (http://www.openstreetmap.org/?lat=52.1847850084305&lon=0.270532965660095&zoom=18) and I suspect it's connected with that. At http://www.openstreetmap.org/?lat=52.2105194628239&lon=0.259908735752106&zoom=17 I found a water pipeline (which I've tagged; it's visible on osmarender but not mapnik) as there's a marker sign (like the fire hydrant signs, but blue) where it crosses the road, and there's a marker post where it meets the track going southeast from the road. I traced it as far as I could from the bing photos, as it shows as a disturbance in the fields. There's some kind of pumping station at http://www.openstreetmap.org/?lat=52.1787299215794&layers=O&lon=0.295938849449158&zoom=17, and I could see a faint mark on bing showing a pipeline leading to it (again visible on osmarender). I suspect that one's water, as it leads close to the Fleam Dyke Pumping Station, which is a groundwater extraction plant. There's a big gas pumping station at http://www.openstreetmap.org/?lat=52.4599286913872&layers=O&lon=0.842409431934357&zoom=17 and again I managed to deduce a short section of pipeline from bing. Any of these might be useful starting points for looking for posts. I'll go back to the Six Mile Bottom road one in the next few days and get the exact location (it's within a couple of miles of my house). I also remember someone mentioning a gas pumping station near Duxford, so that might be a good place to start looking around for posts. __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Marker Posts
There's also a water pipeline heading northeast (again, visible on osmarender) at http://www.openstreetmap.org/?lat=52.2165490686893&lon=0.0422796607017517&zoom=17 -- I remember it being built (I used to live near there). Again, I traced it as far as I could from bing. __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Marker Posts
On Thu, Oct 13, 2011 at 2:24 PM, John Sturdy wrote: > I noticed something on the road going north-east from Six Mile Bottom Make that "north-west". whoops -- far too many directions are possible! __John (who really has checked it this time) ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Marker Posts
On Thu, Oct 13, 2011 at 2:24 PM, John Sturdy wrote: > I noticed something on the road going north-east from Six Mile Bottom > (maybe around > http://www.openstreetmap.org/?lat=52.1985273063183&lon=0.28215765953064&zoom=18 > but I can't remember exactly), I think it was a white-and-orange > banded post; I've been meaning to go back and investigate. There's a > gas compressor station fairly nearby > (http://www.openstreetmap.org/?lat=52.1847850084305&lon=0.270532965660095&zoom=18) > and I suspect it's connected with that. Marker now GPS-located and entered as http://www.openstreetmap.org/browse/node/1465884571 There's a straight-line faint mark in a nearby field, now entered as http://www.openstreetmap.org/browse/way/133207790, pointing at the marker post and almost pointing at the pumping station (or at a corner of it). There's another one nearby, http://www.openstreetmap.org/browse/way/133207792, and there's one the other side of the pumping station, http://www.openstreetmap.org/browse/way/133208346, pointing towards the pumping station to the east and to Cambridge city to the west. __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Marker Posts
On Fri, Oct 14, 2011 at 9:59 AM, Robert Whittaker (OSM) wrote: > There's a facility of some sort on the Icknield way, with a pipeline > mapped going SW from it at > http://www.openstreetmap.org/?mlat=52.46023&mlon=0.84189&zoom=16&layers=O That one I got from faint marks on the ground in bing, that line up quite well with the facility (which I think is gas). I found an online document mentioning that pipeline, but haven't been able to find it again. BTW I think that's Peddar's Way rather than Icknield Way. I marked a few more fragments last night, from faint marks on the ground in bing; at first I was hesitant about tagging them as pipeline, but, using the criteria that it must be a straight line, and must line up with another such line which has other evidence (transitively) or with a marker or pumping compound, I've joined some up to make a continuous way: http://www.openstreetmap.org/browse/way/133213587 I haven't been able to find any further marks in that direction, though. The direction it's pointing, I suspect, will line it up with the mark near Burwell that Keith mentioned. There's another long straight mark in the fields near the north-east end of that one, which I've entered as http://www.openstreetmap.org/browse/way/133279546 but am not yet confident about tagging as a pipeline. However there is a pale square on the ground at its northeast end, and another square nearby in the same direction, and they're near a right-of-way, so should be easy to investigate a bit further. ISTR that the document I found but now can't find again indicated that it's the same gas pipeline that passes the Peddar's Way. __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Marker Posts
On Fri, Oct 14, 2011 at 9:37 PM, Keith wrote: > On 14/10/2011 14:55, John Sturdy wrote: >> ISTR that the document I found but now can't find again indicated that >> it's the same gas pipeline that passes the Peddar's Way. > Have you found nationalgrid's own network maps? > > http://www.nationalgrid.com/uk/LandandDevelopment/DDC/GasElectricNW/gaspipes/ That looks familiar -- it might be the document that I was thinking of. It certainly confirms that the pipeline that crosses the Peddar's Way is the same one that passes Burwell and the Wilbrahams. I'm wary about how closely to use an existing map when surveying, because of copyright; but I suppose as long as we do the work of finding marker posts and looking for straight-line variations in crops, it can't be called copying. OTOH we could approach them about importing the shape files they mention, since they make the files publicly available, and the format is documented and various converters are available. They might have reasonable reservations about the risk of people using out-of-date data if the import isn't done regularly, though. Also, it only gives the long-distance distribution network; there must be a lot of other large pipelines, for example (in the area I've been looking at) one into Cambridge city. But it would be a useful start if we could import them. __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Marker Posts
I've downloaded and tried Maperitive, and have now adapted one of the stylesheet files to show electricity lines and pipelines (blue for water, yellow for gas, red for electricity, as that seems to be the colour code for buried pipes and conduits). And I've put marker posts in as orange triangles. I've attached it to this message; feel welcome to improve it (and perhaps send back the improvements), and once it's stable I'll put it up on the Maperitive rules collection. It's aimed at showing gaps in networks; I've already identified the Sawston area as not having powerlines filled in, and filled it in a bit over lunchtime. __John Infrastructure.mrules Description: Binary data ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Marker Posts
On Tue, Oct 18, 2011 at 3:08 PM, Ed Loach wrote: > Bother, shortened the wrong link. I meant to send > http://is.gd/cDcwb7 Thanks, that's the kind of thing I was aiming for but including power lines and markers as well. __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
[Talk-gb-midanglia] Some more for underground / infrastructure enthusiasts (was: marker posts)
While looking for powerlines near Grafham Water, I spotted some straight-line disturbances in fields, each running through more than one field, so I guess they're the backfill from laying pipelines. They are these ways: http://www.openstreetmap.org/browse/way/134670223 http://www.openstreetmap.org/browse/way/134670054 http://www.openstreetmap.org/browse/way/134670032 http://www.openstreetmap.org/browse/way/134670053 http://www.openstreetmap.org/browse/way/134670041 They converge near something that looks like a pumping station: http://www.openstreetmap.org/browse/way/134670044 I guess these are for water distribution, as Grafham is a reservoir, but I won't label them as such without some kind of confirmation. __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Project Drake - mapping the University of Cambridge
On Mon, Dec 5, 2011 at 5:42 PM, David Earl wrote: > Those of you on talk-gb may remember the announcement of the University of > Cambridge's OpenStreetMap project ( > http://lists.openstreetmap.org/pipermail/talk-gb/2011-July/012067.html ). > > I was appointed to the project from that and I have now written up a bit > about what I'm doing on my OSM diary ( > http://www.openstreetmap.org/user/davidearl/diary/15398 ), and also > published the tagging schema I'm working to ( > http://wiki.openstreetmap.org/wiki/Cambridge/University_of_Cambridge ) > (which is, of course, a living document which we'll be updating as things > progress), and which I hope may help others inclined to map parts of the > University. > A small query on the tagging scheme: In the wiki document, it gives the following for colonnades: highway=footway (or service etc) area=yes tunnel=yes layer=-1 But, if the colonnade's walking surface is at ground level, shouldn't that be layer=0 with layer=-1 indicating a tunnel below ground level? __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Licence Change
On Wed, Dec 21, 2011 at 2:27 PM, Ed Loach wrote: > They are currently declined, but I hope they'll say why and I can talk with > them about saving their footpath contributions at least. Declining seems so pointless; all the same mapping will get done anyway, it just makes more work for the other mappers. __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
Re: [Talk-gb-midanglia] Spagehtti junctions in Cambridge and St Ives
I've looked a bit further into disabled access to crossings, and raised it on the accessability mailing list, and found that there is a proposal to map crossing islands already (http://wiki.openstreetmap.org/wiki/Proposed_features/Traffic_island). After mailing about this, I then realized that it might be good to mark routes through a crossing (particularly for the type of traffic island which has two crossings onto it that aren't opposite each other); and someone on the accessibility list found that "crossing" is already used as a way as well as as a node. __John ___ Talk-gb-midanglia mailing list Talk-gb-midanglia@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb-midanglia
