Re: [Talk-GB] Fw: Fowey estuary coastline problem
Thanks Colin, Thought there may be an official answer out there somewhere. I’ve been working around the coasts of Somerset & Devon, and splitting the boundaries, coastline going to the High Water Mark, and the Admin Boundaries going to the extract, (LWM in most cases) Jason From: Colin Smale Sent: Wednesday, January 30, 2013 3:02 PM To: talk-gb@openstreetmap.org Subject: Re: [Talk-GB] Fw: Fowey estuary coastline problem I found this report from 2000 which addresses exactly this point. http://jncc.defra.gov.uk/pdf/tyldesley_reportall.pdf It still doesn't answer the question "why Dittisham" though. According to one algorithm it should cross the river at the tidal limit, which is in Totnes, far above Dittisham. That would be even sillier. The boundary cuts straight across Torbay from Torquay to Brixham - but this is as defined in a specific law. The City of Bristol's administrative boundaries are even sillier. In any case, the coastline (which is a matter of geographical fact, although you can argue about whether it's HWM/LWM etc) is not the same as the limit of (governmental) jurisdiction and the Extent of the Realm; if they are not colinear, there should be two lines in OSM, right? Colin On 2013-01-30 11:46, Jason Woollacott wrote: I wish I knew the reasoning behind it... I can understand the boundary being at the low water mark, but it seems very odd just to draw it across at Dittisham. Jason ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Fw: Fowey estuary coastline problem
I found this report from 2000 which addresses exactly this point. http://jncc.defra.gov.uk/pdf/tyldesley_reportall.pdf It still doesn't answer the question "why Dittisham" though. According to one algorithm it should cross the river at the tidal limit, which is in Totnes, far above Dittisham. That would be even sillier. The boundary cuts straight across Torbay from Torquay to Brixham - but this is as defined in a specific law. The City of Bristol's administrative boundaries are even sillier. In any case, the coastline (which is a matter of geographical fact, although you can argue about whether it's HWM/LWM etc) is not the same as the limit of (governmental) jurisdiction and the Extent of the Realm; if they are not colinear, there should be two lines in OSM, right? Colin On 2013-01-30 11:46, Jason Woollacott wrote: > I wish I knew the reasoning behind it... I can understand the boundary > being at the low water mark, but it seems very odd just to draw it across > at Dittisham. > > Jason ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Fw: Fowey estuary coastline problem
So it seems, although the OS at least manages to limit the ugliness factor. I wonder if there is some historical reason for it? Next time I use the ferry I'll ask the guy to make sure he stays in Devon :] Kevin On 30 January 2013 11:37, Steve Doerr wrote: > That's how it appears on OS maps, e.g. > http://www.streetmap.co.uk/map.srf?X=286849&Y=54821&A=Y&Z=115 > > Steve > > > On 30/01/2013 10:46, Jason Woollacott wrote: >> >> Hi Kevin, >> >> Agreed, it looks wrong... The data came from the OS Boundary Line data, >> which I took from the gpx trace from Colin's site, >> http://csmale.dev.openstreetmap.org/os_boundaryline/ >> >> I wish I knew the reasoning behind it... I can understand the boundary >> being at the low water mark, but it seems very odd just to draw it across >> at Dittisham. >> >> Jason >> >> >> >> >> -Original Message- From: Kevin Peat >> Sent: Wednesday, January 30, 2013 9:48 AM >> To: Jason Woollacott >> Cc: talk-gb >> Subject: Re: [Talk-GB] Fowey estuary coastline problem >> >> Hi Jason, >> >> On 30 January 2013 08:00, Jason Woollacott wrote: >>> >>> This relates to some work I did on the Cornish county boundary a while >>> back, >>> the same also has happened at Newton Ferrers, just south of Plymouth. >>> >> >> I had been meaning to ask you about the boundary changes you made. Is >> it right that the county boundaries now go some way up the rivers? In >> the case of the River Dart all the way up to Dittisham. Just seems >> counterintuitive (+ also looks crap). >> >> Kevin (user:devonshire) >> ___ >> Talk-GB mailing list >> Talk-GB@openstreetmap.org >> http://lists.openstreetmap.org/listinfo/talk-gb > > > > ___ > Talk-GB mailing list > Talk-GB@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Bug-free processed_p.shp for UK?
Hello everyone, Related to another thread: has anyone got a (can be old) version of processed_p.shp which is known to be more or less free of bugs/defects for the whole of the England/Wales coastline? Reason being I have some odd "flooding" artefacts on Freemap (mostly in N Wales) which were from a Dec 2011 version. I updated to the most recent version and now most of Oxfordshire is under water (mind you that might be accurate having had the misfortune to live through 2012 in southern England lol) Thanks, Nick ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Using UK postcode data to generate a heat map
Do you know about openheatmap (http://www.openheatmap.com )? Basically you can supply spreadsheets of locations vs data and it will do the graphics for you. It doesn't know about postcodes, but if you have the means to get locations for postcodes you don't have to do any of the rest. David On 30/01/2013 12:44, David Fisher wrote: Hi all, A friend has come to me with an interesting-sounding request, and I just wondered how feasible it might be. He has a database of UK postcodes and some measurement or other (not sure what yet) and would like to create a heat map. Neither of us are techies, but I've been contributing to OSM for a year now and am familiar with JOSM and (to a lesser extent) QGIS. How difficult a project is likely to be? (bearing in mind I'd be doing it in my spare time as a favour and for my personal interest) I assume you'd first have to convert the postcodes to lat/lon? Then I'd need a rendering tool for the "heat" colours, and then a simple base map on which to overlay it (just thinking out loud now). It sounds like the sort of thing it'd be useful to have a tutorial for. If one exists, great! If not, and if I'm successful, I might have a go at writing one. Thanks in advance, David. (user Pgd81) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Using UK postcode data to generate a heat map
Hi all, A friend has come to me with an interesting-sounding request, and I just wondered how feasible it might be. He has a database of UK postcodes and some measurement or other (not sure what yet) and would like to create a heat map. Neither of us are techies, but I've been contributing to OSM for a year now and am familiar with JOSM and (to a lesser extent) QGIS. How difficult a project is likely to be? (bearing in mind I'd be doing it in my spare time as a favour and for my personal interest) I assume you'd first have to convert the postcodes to lat/lon? Then I'd need a rendering tool for the "heat" colours, and then a simple base map on which to overlay it (just thinking out loud now). It sounds like the sort of thing it'd be useful to have a tutorial for. If one exists, great! If not, and if I'm successful, I might have a go at writing one. Thanks in advance, David. (user Pgd81) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Fw: Fowey estuary coastline problem
That's how it appears on OS maps, e.g. http://www.streetmap.co.uk/map.srf?X=286849&Y=54821&A=Y&Z=115 Steve On 30/01/2013 10:46, Jason Woollacott wrote: Hi Kevin, Agreed, it looks wrong... The data came from the OS Boundary Line data, which I took from the gpx trace from Colin's site, http://csmale.dev.openstreetmap.org/os_boundaryline/ I wish I knew the reasoning behind it... I can understand the boundary being at the low water mark, but it seems very odd just to draw it across at Dittisham. Jason -Original Message- From: Kevin Peat Sent: Wednesday, January 30, 2013 9:48 AM To: Jason Woollacott Cc: talk-gb Subject: Re: [Talk-GB] Fowey estuary coastline problem Hi Jason, On 30 January 2013 08:00, Jason Woollacott wrote: This relates to some work I did on the Cornish county boundary a while back, the same also has happened at Newton Ferrers, just south of Plymouth. I had been meaning to ask you about the boundary changes you made. Is it right that the county boundaries now go some way up the rivers? In the case of the River Dart all the way up to Dittisham. Just seems counterintuitive (+ also looks crap). Kevin (user:devonshire) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Fw: Fowey estuary coastline problem
Hi Kevin, Agreed, it looks wrong... The data came from the OS Boundary Line data, which I took from the gpx trace from Colin's site, http://csmale.dev.openstreetmap.org/os_boundaryline/ I wish I knew the reasoning behind it... I can understand the boundary being at the low water mark, but it seems very odd just to draw it across at Dittisham. Jason -Original Message- From: Kevin Peat Sent: Wednesday, January 30, 2013 9:48 AM To: Jason Woollacott Cc: talk-gb Subject: Re: [Talk-GB] Fowey estuary coastline problem Hi Jason, On 30 January 2013 08:00, Jason Woollacott wrote: This relates to some work I did on the Cornish county boundary a while back, the same also has happened at Newton Ferrers, just south of Plymouth. I had been meaning to ask you about the boundary changes you made. Is it right that the county boundaries now go some way up the rivers? In the case of the River Dart all the way up to Dittisham. Just seems counterintuitive (+ also looks crap). Kevin (user:devonshire) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Fowey estuary coastline problem
Hi Jason, On 30 January 2013 08:00, Jason Woollacott wrote: > This relates to some work I did on the Cornish county boundary a while back, > the same also has happened at Newton Ferrers, just south of Plymouth. > I had been meaning to ask you about the boundary changes you made. Is it right that the county boundaries now go some way up the rivers? In the case of the River Dart all the way up to Dittisham. Just seems counterintuitive (+ also looks crap). Kevin (user:devonshire) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Fowey estuary coastline problem
Best advised to leave the natural=water in place (with a fixme note) until the coastline re-renders (which could be a few weeks) Richard On Wed, Jan 30, 2013 at 8:00 AM, Jason Woollacott wrote: > This relates to some work I did on the Cornish county boundary a while > back, the same also has happened at Newton Ferrers, just south of Plymouth. > > Whilst remapping the boundary, I also pushed the coastline further up the > channel.The new boundary has rendered, and the removal of the original > ‘water’ tag has gone, but the planet file doesn’t seem to have generated a > new coastline yet. > > Does anybody know if a new coastline will be generated soon? as this > should address the problem. > > Jason (UniEagle) > > *From:* cotswolds mapper > *Sent:* Tuesday, January 29, 2013 11:17 PM > *To:* talk-gb > *Subject:* [Talk-GB] Fowey estuary coastline problem > > Just been looking at Fowey on OSM and noticed (well it was hard to miss) > that there's something wrong with the coastline in the Fowey estuary. I > don't have any experience of coastlines, so I trust someone else can fix > this. > > Rob > > -- > ___ > Talk-GB mailing list > Talk-GB@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-gb > > > ___ > Talk-GB mailing list > Talk-GB@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-gb > > ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Fowey estuary coastline problem
On 30/01/2013 08:00, Jason Woollacott wrote: Does anybody know if a new coastline will be generated soon? as this should address the problem. There is often a very a long time lag for coastline re-rendering, sometimes several weeks. Because of this long cycle time, it is a good idea to double check any edits to the coastline for discontinuities. If you have broken it & wait until the re-rendering, then your error is visible to the world for another few weeks! ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Fowey estuary coastline problem
This relates to some work I did on the Cornish county boundary a while back, the same also has happened at Newton Ferrers, just south of Plymouth. Whilst remapping the boundary, I also pushed the coastline further up the channel.The new boundary has rendered, and the removal of the original ‘water’ tag has gone, but the planet file doesn’t seem to have generated a new coastline yet. Does anybody know if a new coastline will be generated soon? as this should address the problem. Jason (UniEagle) From: cotswolds mapper Sent: Tuesday, January 29, 2013 11:17 PM To: talk-gb Subject: [Talk-GB] Fowey estuary coastline problem Just been looking at Fowey on OSM and noticed (well it was hard to miss) that there's something wrong with the coastline in the Fowey estuary. I don't have any experience of coastlines, so I trust someone else can fix this. Rob ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
