Re: [Talk-GB] Surveying rural buildings
On 24/07/2020 14:41, Mark Goodge wrote: On 24/07/2020 13:20, Martin Wynne wrote: Most of them go back to OS Explorer when they find UK public rights of way are not shown in different colours on the OSM standard map. This is one of the reasons why it would be nice to have a UK-specific stylesheet for OSM. The data is there, so there's no reason why it cant be rendered That's exactly what https://map.atownsend.org.uk/maps/map/map.html * does. Nick's already mentioned https://www.free-map.org.uk/ , so you've now got a couple of choices - it wouldn't surprise me if there are others! Best Regards, Andy * yes, I look after that site and map style. See the "about" link at the top for more info; and "changelog" for links to the source of all the components. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
On Friday, 24 July 2020 14:41:08 BST Mark Goodge wrote: > On 24/07/2020 13:20, Martin Wynne wrote: > > > but most people I know aren't aware of OSM. > > > > I've been trying to persuade country-walking groups to use OSM. There is > > a lot of useful stuff there not shown on OS Explorer -- stiles, kissing > > gates, benches, bus stops, all pubs, cafes, etc. It's a lot more > > up-to-date, and if they find anything missing they can add it themselves > > for the benefit of others. > > > > Most of them go back to OS Explorer when they find UK public rights of > > way are not shown in different colours on the OSM standard map. > > Yes; this is an issue specifically for map users on foot. With roads, > the question of legality is much less of an issue - almost all roads of > any significance are public highways, and those that are not are usually > clearly marked as such. But with footpaths and farm tracks in open > countryside, there is often no obvious visual distinction, and yet the > legality is a critical factor to users. This is an area in which OS maps > are much more useful to walkers. Not convinced that this is a significant web rendering issue. For me, saving battery by not being on-line all the time is a major driver when hiking. Swapping to OsmAnd gives all the benefits of OSM maps and many path/footpath rendering options. Andy. This email and any attachments are intended solely for the use of the named recipients. If you are not the intended recipient you must not use, disclose, copy or distribute this email or any of its attachments and should notify the sender immediately and delete this email from your system. UK Research and Innovation (UKRI) has taken every reasonable precaution to minimise risk of this email or any attachments containing viruses or malware but the recipient should carry out its own virus and malware checks before opening the attachments. UKRI does not accept any liability for any losses or damages which the recipient may sustain due to presence of any viruses. Opinions, conclusions or other information in this message and attachments that are not related directly to UKRI business are solely those of the author and do not represent the views of UKRI. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
Re a "UK walking style" there is Freemap, my own (long-standing) project, which has gone through a number of ups and downs (mostly due to hosting difficulties and lack of time to work on it) but has had a number of style improvements this year due to having more time than expected to work on it. It's at https://www.free-map.org.uk. It aims to distinguish between the different types of walking routes, in particular public rights of way and permissive paths. It doesn't use the standard Mapnik approach, but kothic.js, which is a client-side rendering library which takes GeoJSON data and MapCSS compiled into JavaScript. Nick From: Mark Goodge Sent: 24 July 2020 14:41 To: talk-gb@openstreetmap.org Subject: Re: [Talk-GB] Surveying rural buildings On 24/07/2020 13:20, Martin Wynne wrote: > > but most people I know aren't aware of OSM. > > I've been trying to persuade country-walking groups to use OSM. There is > a lot of useful stuff there not shown on OS Explorer -- stiles, kissing > gates, benches, bus stops, all pubs, cafes, etc. It's a lot more > up-to-date, and if they find anything missing they can add it themselves > for the benefit of others. > > Most of them go back to OS Explorer when they find UK public rights of > way are not shown in different colours on the OSM standard map. Yes; this is an issue specifically for map users on foot. With roads, the question of legality is much less of an issue - almost all roads of any significance are public highways, and those that are not are usually clearly marked as such. But with footpaths and farm tracks in open countryside, there is often no obvious visual distinction, and yet the legality is a critical factor to users. This is an area in which OS maps are much more useful to walkers. On the other hand, one of the areas where OSM is better than OS is that we map permissive paths, which OS tends not to unless they are big enough to also be usable by vehicles (and even then, it doesn't have any means of indicating permission). This is one of the reasons why it would be nice to have a UK-specific stylesheet for OSM. The data is there, so there's no reason why it cant be rendered. Or, alternatively, a dedicated "outdoors" stylesheet which focusses on hiking, biking, etc. Mark ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
On 24/07/2020 13:20, Martin Wynne wrote: > but most people I know aren't aware of OSM. I've been trying to persuade country-walking groups to use OSM. There is a lot of useful stuff there not shown on OS Explorer -- stiles, kissing gates, benches, bus stops, all pubs, cafes, etc. It's a lot more up-to-date, and if they find anything missing they can add it themselves for the benefit of others. Most of them go back to OS Explorer when they find UK public rights of way are not shown in different colours on the OSM standard map. Yes; this is an issue specifically for map users on foot. With roads, the question of legality is much less of an issue - almost all roads of any significance are public highways, and those that are not are usually clearly marked as such. But with footpaths and farm tracks in open countryside, there is often no obvious visual distinction, and yet the legality is a critical factor to users. This is an area in which OS maps are much more useful to walkers. On the other hand, one of the areas where OSM is better than OS is that we map permissive paths, which OS tends not to unless they are big enough to also be usable by vehicles (and even then, it doesn't have any means of indicating permission). This is one of the reasons why it would be nice to have a UK-specific stylesheet for OSM. The data is there, so there's no reason why it cant be rendered. Or, alternatively, a dedicated "outdoors" stylesheet which focusses on hiking, biking, etc. Mark ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
> but most people I know aren't aware of OSM. I've been trying to persuade country-walking groups to use OSM. There is a lot of useful stuff there not shown on OS Explorer -- stiles, kissing gates, benches, bus stops, all pubs, cafes, etc. It's a lot more up-to-date, and if they find anything missing they can add it themselves for the benefit of others. Most of them go back to OS Explorer when they find UK public rights of way are not shown in different colours on the OSM standard map. Martin. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
Traveline, a public transport website, use OSM for both presenting a map and for routing, eg http://www.travelinesw.com/ They get confused by bus-only roads - access=no/motor_vehicle=no combined with bus=yes/designated on a road leads to very strange routing (or did the last time I tried to plan a route in Reading)! Some delivery companies use OSM - there are several groups of professional mappers who edit the map on their behalf. As for direct use by the general public - I know people who use OpenCycleMap.org, but most people I know aren't aware of OSM. Jon Message: 1 Date: Fri, 24 Jul 2020 11:46:08 +0100 From: Robert Skedgell To: talk-gb@openstreetmap.org Subject: Re: [Talk-GB] Surveying rural buildings Message-ID: <3bf3ed9c-b053-38f9-700c-bbe64e14e...@hubris.org.uk> Content-Type: text/plain; charset=utf-8 On 23/07/2020 10:55, Mateusz Konieczny via Talk-GB wrote: > > > > Jul 23, 2020, 11:49 by for...@david-woolley.me.uk: > > On 23/07/2020 10:12, Nick wrote: > > Do we actually know what the general public use OSM for? > > > My impression is that the target for a lot of the material in OSM is > professional users of maps, rather than the general public. > > I would say that most of use by general public is indirect - from location > maps in a bus, through maps on mapy.cz/Osmand/FB/Snapchat/Uber/Maps.me > to indirectly benefiting from use of OSM data in various > plans/analysis/scientific research. I though Uber used Google, which would explain a couple of comical misdirections to somewhere near-ish to my destination, which I could replicate later on in Google. > > I would say that direct use by general public is going to be fairly > rare, though still > happening, like with nearly all resources. > There's also a lot of indirect use by the public in route planning sites and apps, particularly for cyclists, e.g. Komoot, CycleStreets and cycle.travel It's also fairly heavily used by sport and activity tracking apps like Strava and Training Peaks (both via Mapbox), VeloViewer, etc. -- Robert Skedgell (rskedgell) ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
Jul 24, 2020, 12:46 by r...@hubris.org.uk: > On 23/07/2020 10:55, Mateusz Konieczny via Talk-GB wrote: > >> >> >> >> Jul 23, 2020, 11:49 by for...@david-woolley.me.uk: >> >> On 23/07/2020 10:12, Nick wrote: >> >> Do we actually know what the general public use OSM for? >> >> >> My impression is that the target for a lot of the material in OSM is >> professional users of maps, rather than the general public. >> >> I would say that most of use by general public is indirect - from location >> maps in a bus, through maps on mapy.cz/Osmand/FB/Snapchat/Uber/Maps.me >> to indirectly benefiting from use of OSM data in various >> plans/analysis/scientific research. >> > > I though Uber used Google, which would explain a couple of comical > misdirections to somewhere near-ish to my destination, which I could > replicate later on in Google. > I have seen reports that they changed map source in app (I never used Uber) - it may be also Android vs iPhone or deployed only for limited testing ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
On 23/07/2020 10:55, Mateusz Konieczny via Talk-GB wrote: > > > > Jul 23, 2020, 11:49 by for...@david-woolley.me.uk: > > On 23/07/2020 10:12, Nick wrote: > > Do we actually know what the general public use OSM for? > > > My impression is that the target for a lot of the material in OSM is > professional users of maps, rather than the general public. > > I would say that most of use by general public is indirect - from location > maps in a bus, through maps on mapy.cz/Osmand/FB/Snapchat/Uber/Maps.me > to indirectly benefiting from use of OSM data in various > plans/analysis/scientific research. I though Uber used Google, which would explain a couple of comical misdirections to somewhere near-ish to my destination, which I could replicate later on in Google. > > I would say that direct use by general public is going to be fairly > rare, though still > happening, like with nearly all resources. > There's also a lot of indirect use by the public in route planning sites and apps, particularly for cyclists, e.g. Komoot, CycleStreets and cycle.travel It's also fairly heavily used by sport and activity tracking apps like Strava and Training Peaks (both via Mapbox), VeloViewer, etc. -- Robert Skedgell (rskedgell) ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
Jul 24, 2020, 11:38 by n...@foresters.org: > > My thanks to Mateusz and Dave for their comments, which I would like to > try to summarise as I see it: > > the purpose of OSM mapping in the UK of rural buildings isprimarily > to provide a general location of properties i.e.accuracy and > precision are unnecessary. > I would say that extreme precision/accuracy is not necessary. Some minimal accuracy is necessary, "I will map square area and tag it as building no matter building shape" is not OK. Improving roughly mapped geometry by a better one is always welcomed. > 'armchair' mapping therefore meets the needs, predominantlyusing > aerial photos or other tools/data > > If so, I guess I was missing the point as I kind of thought that in the > future there might be the potential for collaboration with Ordnance > Survey e.g. filling in the gaps with high quality surveys, sharing > 'other' data (based on local knowledge) that is not on OS maps etc. > > It potentially would be nice, though official datasets (based on experience from Poland) may have other quality issue like say dividing building in too many areas. My favorite case has every step in an outdoor staircase mapped as a separate area, that was blindly imported. Or including only parts of buildings that are officially existing, without illegally constructed parts. > > I also thought that there might be scope for collaboration with > construction developers - after all they do detailed surveys of their > building sites which could be added to OSM. For some developers that > would mean they could have free plans (site/location etc.) for their > planning applications. The data in turn could be of value to the Local > Authorities e.g. creating UPRN and BLPU data - with a collaborative > approach OSM 'volunteers' could also be checking data quality. > > > Hmm.. the potential for real collaboration between OSM 'volunteers', OS > and other agencies strikes me as a possible win-win?.. > > Yes, though topic is quite tricky due to legal issues and due to different priorities/approaches. > but I suppose that is me going 'a step too far' > I would not say that is going too far. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
My thanks to Mateusz and Dave for their comments, which I would like to try to summarise as I see it: * the purpose of OSM mapping in the UK of rural buildings is primarily to provide a general location of properties i.e. accuracy and precision are unnecessary. * 'armchair' mapping therefore meets the needs, predominantly using aerial photos or other tools/data If so, I guess I was missing the point as I kind of thought that in the future there might be the potential for collaboration with Ordnance Survey e.g. filling in the gaps with high quality surveys, sharing 'other' data (based on local knowledge) that is not on OS maps etc. I also thought that there might be scope for collaboration with construction developers - after all they do detailed surveys of their building sites which could be added to OSM. For some developers that would mean they could have free plans (site/location etc.) for their planning applications. The data in turn could be of value to the Local Authorities e.g. creating UPRN and BLPU data - with a collaborative approach OSM 'volunteers' could also be checking data quality. Hmm.. the potential for real collaboration between OSM 'volunteers', OS and other agencies strikes me as a possible win-win?.. but I suppose that is me going 'a step too far' On 23/07/2020 10:55, Mateusz Konieczny via Talk-GB wrote: Jul 23, 2020, 11:49 by for...@david-woolley.me.uk: On 23/07/2020 10:12, Nick wrote: Do we actually know what the general public use OSM for? My impression is that the target for a lot of the material in OSM is professional users of maps, rather than the general public. I would say that most of use by general public is indirect - from location maps in a bus, through maps on mapy.cz/Osmand/FB/Snapchat/Uber/Maps.me to indirectly benefiting from use of OSM data in various plans/analysis/scientific research. I would say that direct use by general public is going to be fairly rare, though still happening, like with nearly all resources. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
Jul 23, 2020, 11:49 by for...@david-woolley.me.uk: > On 23/07/2020 10:12, Nick wrote: > >> Do we actually know what the general public use OSM for? >> > > My impression is that the target for a lot of the material in OSM is > professional users of maps, rather than the general public. > I would say that most of use by general public is indirect - from location maps in a bus, through maps on mapy.cz/Osmand/FB/Snapchat/Uber/Maps.me to indirectly benefiting from use of OSM data in various plans/analysis/scientific research. I would say that direct use by general public is going to be fairly rare, though still happening, like with nearly all resources. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
On 23/07/2020 10:12, Nick wrote: Do we actually know what the general public use OSM for? My impression is that the target for a lot of the material in OSM is professional users of maps, rather than the general public. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
I have not tried Vector Map Local (seems pricey if you want to cover large rural areas and I am not running a business). As far as I know, OSMAI only covers England (not Scotland?) Re purpose - in Scotland there are sites (e.g. https://osg.scot/portal/) that enable you to find a property easily. So the purpose here may need to be different (e.g. more detailed mapping, link to other local data)? Do we actually know what the general public use OSM for? On 22/07/2020 22:13, Dave Love wrote: On Mon, 2020-07-20 at 11:29 +0100, Nick wrote: Dear all I have been mapping a few properties using Bing maps with local knowledge supplemented by some physical measuring (tape measure or simply pacing). I now want to ramp up my mapping but the challenge especially in rural areas is that sometimes the outline of a building is not clear - either obscured (e.g. trees) or unclear (e.g. decking or car ports). Also some aerial imagery is offset. Also, most of the properties are not along public roads. So my question is what are the preferred methods for surveying that others are using? I don't know about preferred, and it sounds as if you want something better, but is OS VectorMapLocal any use? It gives the impression of being machine-derived from imagery (probably not as well as "osmai" in JOSM), and needs significant tidying up using good imagery if you care to do it, but it generally gives a good indication of buildings' presence, at least. It definitely won't help with car ports etc. It would be interesting to know if it does show buildings that are obscured in imagery. I've used it in built-up areas, and I don't remember relevant cases; in one with trees that I remember checking, it wasn't recent enough anyway. I don't think VectorMapLocal is actually listed on the wiki, and it could do with some notes on using it. It's definitely made adding buildings in urban areas easier since I discovered it (from a reference on a web site using it, not OSM info!). Then UPRN and land registry data seem to be useful for splitting building outlines plausibly to aid address surveys. I guess at the back of my mind is what do people perceive as the purpose of mapping (hope I have not opened a can of worms). I see the purpose of adding buildings and then address information (especially postcodes) as allowing you to find them using the map for navigation. Your mileage may vary, so to speak. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk- ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
On Mon, 2020-07-20 at 11:29 +0100, Nick wrote: > Dear all > > I have been mapping a few properties using Bing maps with local > knowledge supplemented by some physical measuring (tape measure or > simply pacing). I now want to ramp up my mapping but the challenge > especially in rural areas is that sometimes the outline of a building > is > not clear - either obscured (e.g. trees) or unclear (e.g. decking or > car > ports). Also some aerial imagery is offset. Also, most of the > properties > are not along public roads. So my question is what are the preferred > methods for surveying that others are using? I don't know about preferred, and it sounds as if you want something better, but is OS VectorMapLocal any use? It gives the impression of being machine-derived from imagery (probably not as well as "osmai" in JOSM), and needs significant tidying up using good imagery if you care to do it, but it generally gives a good indication of buildings' presence, at least. It definitely won't help with car ports etc. It would be interesting to know if it does show buildings that are obscured in imagery. I've used it in built-up areas, and I don't remember relevant cases; in one with trees that I remember checking, it wasn't recent enough anyway. I don't think VectorMapLocal is actually listed on the wiki, and it could do with some notes on using it. It's definitely made adding buildings in urban areas easier since I discovered it (from a reference on a web site using it, not OSM info!). Then UPRN and land registry data seem to be useful for splitting building outlines plausibly to aid address surveys. > I guess at the back of my mind is what do people perceive as the > purpose of mapping (hope I have not opened a can of worms). I see the purpose of adding buildings and then address information (especially postcodes) as allowing you to find them using the map for navigation. Your mileage may vary, so to speak. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
OSM building data was already used in Poland for flood preparation analysis. It was used to supplement official building dataset, that was of much higher detail and accuracy, but also outdated (updated every N years) and was not including illegally constructed buildings and buildlings not requiring planning permissions (as it was based on construction permits). Jul 22, 2020, 21:37 by n...@foresters.org: > > Hi Mateusz > > > Many thanks for your comments. > > > It would also be good to hear from others, particularly around the > question of the purpose of mapping. I was thinking that my purpose was > to provide other people (OSM mappers and the general public) with the > information that meets their needs. The problem is that without knowing > how people use the maps, identifying the quality of the data is tricky. > The other challenge for people using the maps is not knowing what the > quality is ~ e.g. how comprehensively properties are mapped, precision > in terms of location etc. I also wonder if the quality is good, that > people might use OSM as the map to go to e.g. for Planning applications? > > > Cheers > > > Nick > > On 22/07/2020 13:20, Mateusz Konieczny via Talk-GB wrote: > >> >> >> >> Jul 20, 2020, 12:29 by >> n...@foresters.org>> : >> >>> Dear all >>> >>> I have been mapping a few properties using Bing maps with local >>> knowledge supplemented by some physical measuring (tape measure or >>> simply pacing). I now want to ramp up my mapping but the challenge >>> especially in rural areas is that sometimes the outline of a >>> building is not clear - either obscured (e.g. trees) or unclear >>> (e.g. decking or car ports). Also some aerial imagery is offset. >>> Also, most of the properties are not along public roads. So my >>> question is what are the preferred methods for surveying that >>> others are using? >>> >> Nobody replied so far so... >> >> I am not worried too much about geometry offset, especiallyin rural >> areas where >> moving building to fix offset is usually not problematic. >> >>> Supplementary question, do you include or exclude conservatories, >>> car ports etc. from the main structure of the property? >>> >> It depends. I usually include them in case of armchairmapping of >> aerial images (unless there is >> a visible gap). In mapping during survey it depends whatevercar port >> is part of a building structure >> or a separate structure standing next to house. >> >>> I guess at the back of my mind is what do people perceive as the >>> purpose of mapping (hope I have not opened a can of worms). >>> >> In my case I map what is useful for projects that I use/likeor is >> very simple to map >> (=available as StreetComplete quest). >> >> So right now I map parking lanes for >> >> https://github.com/dabreegster/abstreet >> and in rural areas I tend to map hiking routes rather thanbuildings. >> >> ___Talk-GB mailing list>> >> Talk-GB@openstreetmap.org>> https://lists.openstreetmap.org/listinfo/talk-gb >> ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
Hi Mateusz Many thanks for your comments. It would also be good to hear from others, particularly around the question of the purpose of mapping. I was thinking that my purpose was to provide other people (OSM mappers and the general public) with the information that meets their needs. The problem is that without knowing how people use the maps, identifying the quality of the data is tricky. The other challenge for people using the maps is not knowing what the quality is ~ e.g. how comprehensively properties are mapped, precision in terms of location etc. I also wonder if the quality is good, that people might use OSM as the map to go to e.g. for Planning applications? Cheers Nick On 22/07/2020 13:20, Mateusz Konieczny via Talk-GB wrote: Jul 20, 2020, 12:29 by n...@foresters.org: Dear all I have been mapping a few properties using Bing maps with local knowledge supplemented by some physical measuring (tape measure or simply pacing). I now want to ramp up my mapping but the challenge especially in rural areas is that sometimes the outline of a building is not clear - either obscured (e.g. trees) or unclear (e.g. decking or car ports). Also some aerial imagery is offset. Also, most of the properties are not along public roads. So my question is what are the preferred methods for surveying that others are using? Nobody replied so far so... I am not worried too much about geometry offset, especially in rural areas where moving building to fix offset is usually not problematic. Supplementary question, do you include or exclude conservatories, car ports etc. from the main structure of the property? It depends. I usually include them in case of armchair mapping of aerial images (unless there is a visible gap). In mapping during survey it depends whatever car port is part of a building structure or a separate structure standing next to house. I guess at the back of my mind is what do people perceive as the purpose of mapping (hope I have not opened a can of worms). In my case I map what is useful for projects that I use/like or is very simple to map (=available as StreetComplete quest). So right now I map parking lanes for https://github.com/dabreegster/abstreet and in rural areas I tend to map hiking routes rather than buildings. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Surveying rural buildings
Jul 20, 2020, 12:29 by n...@foresters.org: > Dear all > > I have been mapping a few properties using Bing maps with local knowledge > supplemented by some physical measuring (tape measure or simply pacing). I > now want to ramp up my mapping but the challenge especially in rural areas is > that sometimes the outline of a building is not clear - either obscured (e.g. > trees) or unclear (e.g. decking or car ports). Also some aerial imagery is > offset. Also, most of the properties are not along public roads. So my > question is what are the preferred methods for surveying that others are > using? > Nobody replied so far so... I am not worried too much about geometry offset, especially in rural areas where moving building to fix offset is usually not problematic. > Supplementary question, do you include or exclude conservatories, car ports > etc. from the main structure of the property? > It depends. I usually include them in case of armchair mapping of aerial images (unless there is a visible gap). In mapping during survey it depends whatever car port is part of a building structure or a separate structure standing next to house. > I guess at the back of my mind is what do people perceive as the purpose of > mapping (hope I have not opened a can of worms). > In my case I map what is useful for projects that I use/like or is very simple to map (=available as StreetComplete quest). So right now I map parking lanes for https://github.com/dabreegster/abstreet and in rural areas I tend to map hiking routes rather than buildings. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Surveying rural buildings
Dear all I have been mapping a few properties using Bing maps with local knowledge supplemented by some physical measuring (tape measure or simply pacing). I now want to ramp up my mapping but the challenge especially in rural areas is that sometimes the outline of a building is not clear - either obscured (e.g. trees) or unclear (e.g. decking or car ports). Also some aerial imagery is offset. Also, most of the properties are not along public roads. So my question is what are the preferred methods for surveying that others are using? I had thought perhaps a) simply sketches coupled with approximate geolocation (GPS assuming I can get a decent fix on a mobile phone) but perhaps b) using GPS linked to a laser rangefinder (e.g. identify corners of buildings from a distance) or c) sophisticated cameras (3D)? I realise that different mappers will be happy with different levels of precision but wonder if in the UK how we can balance cost, time and accuracy by selecting the best approaches. Supplementary question, do you include or exclude conservatories, car ports etc. from the main structure of the property? I guess at the back of my mind is what do people perceive as the purpose of mapping (hope I have not opened a can of worms). Any thoughts/suggestions gratefully received Nick P.S. I am aware of some documentation e.g. https://wiki.openstreetmap.org/wiki/Accuracy ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
