Thanks Steven, I am pretty sure that any reference to Google maps/imagery is not allowed (it would be worth searching through the mail archives for last time it was discussed). You are right though about the age of the Bing imagery - I noticed that the cement works is still there in the photos. I think I tagged it as 'Former....' and used landuse=brownfield, which was the best I could think of for what is there now. Just proves the benefit of real surveys rather than just tracing from the photos!
Graham. On 1 January 2013 14:44, Steven Horner <[email protected]> wrote: > Good job there Graham. I know most of the area around there quite well. > The Bing imagery is old, it still shows the cement works which was > demolished in 2005 I think. Compare it to Google and you can see it is > there no more. Although you can't use Google Satellite view to trace there > is surely no harm in looking at it in another window to help identify if > something is a wall or a fence then jumping back to Bing imagery to fill > in, maybe that isn't allowed but you aren't drawing it from Google maps. > You can see several of the bits you missed because you were unsure are > clearly walls. > > Something I have been considering doing on walks is a timelapse using my > GoPro, setting it to take pictures every few seconds which would aid in > identifying later. The battery doesn't last long so it could only be used > for an hour or so but I will give that a go next time. It has a wide POV so > captures quite a lot. > > > On Tue, Jan 1, 2013 at 2:09 PM, Graham Jones <[email protected]>wrote: > >> I guess it depends on what you think is 'difficult' - to actually survey >> them means a lot of walking, so I tend to only add the ones that I can >> remember when I get home, and get the routes from Bing. >> >> I have just had another look and for dry stone walls, it is quite easy to >> distinguish some in Bing images, which lends itself to armchair mapping, >> but it depends on the direction of the sun - I feel I need the shadow to be >> confident that it is a wall I am looking at and not a track. But a >> reasonable guess that there is a feature there is probably more use than a >> sheet full of nothingness...so I have just spent 20 mins with bing imagery >> adding walls to a hillside that I know has lots of walls on it, and I had >> started adding quite a few from my last visit ( >> http://www.openstreetmap.org/?lat=54.74429&lon=-2.09388&zoom=16&layers=M). >> The suspicious gaps are where I can not tell/remember if there is a fence >> to replace the apparently disappeared wall.... Wire fences of course are >> much harder to spot.... I'll look for the errors next time I am there and >> correct them... >> >> Graham. >> >> >> On 1 January 2013 11:15, Dudley Ibbett <[email protected]> wrote: >> >>> My main motivation for getting involved with OSM was to get a better >>> walking map on my garmin. To this extent I have been adding lots of >>> barriers in the southern part of the Peak District. So it is being done. >>> Whilst it is time consuming I wouldn't say it is difficult. I do survey >>> with a GPS and camera as much as possible, mainly on foot. It can be >>> difficult to determine the type of barrier from satellite imagery so having >>> pictures to refer to makes it easier. JOSM supports photo mapping really >>> well. You do need to check GPS tracks against the imagery and be prepared >>> to adjust the imagery offset. I wouldn't get overly concerned about the >>> accuracy of the position of the barrier. A fairly good job can be done >>> with the existing tools available and people can always adjust as these >>> improve. >>> >>> I must admit I don't map land use if it is farmland. To me if it isn't >>> mapped it is farmland. It would seem a reasonable default. >>> >>> Please give barrier mapping a go as we are out there. >>> >>> Dudley >>> >>> >>> >>> Sent from my iPad >>> >>> On 31 Dec 2012, at 22:00, "Graham Jones" <[email protected]> >>> wrote: >>> >>> I would like to see field boundaries and land uses in OSM, for the same >>> reason as you. I think the main reason that there are not many in there, >>> is that they are very difficult to survey. I have just added them from >>> memory when I have been able to remember enough - it is more realistic to >>> add them now that we have high resolution Bing imagery for countryside >>> areas, but it is a lot of work, even from an armchair. >>> >>> Graham. >>> >>> On 31 December 2012 21:17, Steven Horner <[email protected]>wrote: >>> >>>> Personally I would love to see fields (landuse) and the walls/fences >>>> that make this up marked on OSM but as per the Wiki this is a complicated >>>> area: >>>> http://wiki.openstreetmap.org/wiki/Land_use_and_areas_of_natural_land >>>> >>>> I mapped a small area with landuse and some fences months ago but >>>> refrained from doing anymore because not many others appear to be doing it. >>>> You can see what I did here: >>>> http://www.openstreetmap.org/?lat=54.72508907318115&lon=-1.7569917440414429&zoom=17 >>>> >>>> Some of this I need to fix, it was my early days of OSM editing. >>>> >>>> I would love to use OSM one day as a replacement for Explorer (25K) >>>> maps but until things like walls/fences are shown it would be hard to do. >>>> My idea was to use the OSM to produce some walking guides in printed or >>>> static form but they would need this data added for those areas. >>>> >>>> I know everyones view is different but do others on here use the >>>> landuse and barrier=fence tags in the same way or does it make it look too >>>> complicated. >>>> >>>> Steven >>>> >>>> _______________________________________________ >>>> Talk-GB mailing list >>>> [email protected] >>>> http://lists.openstreetmap.org/listinfo/talk-gb >>>> >>>> >>> >>> >>> -- >>> Graham Jones >>> Hartlepool, UK. >>> >>> _______________________________________________ >>> Talk-GB mailing list >>> [email protected] >>> http://lists.openstreetmap.org/listinfo/talk-gb >>> >>> >> >> >> -- >> Graham Jones >> Hartlepool, UK. >> > > > > -- > www.stevenhorner.com <http://www.stevenhorner.com> > @stevenhorner <http://twitter.com/stevenhorner> > 0191 645 2265 > stevenhorner > -- Graham Jones Hartlepool, UK.
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