[Talk-gb-westmidlands] Nominatim searches in Brum

2011-02-15 Thread Andy Robinson (blackadder-lists)
Doing some Brum searches with nominatim has revealed that we have some
issues with place= conflicts. We have a mixture of suburb, town, village and
hamlet nodes in Birmingham and the West Mids generally and sometimes this
leads to unexpected results, like roads in Sutton Coldfield being in Castle
Vale because castle Vale is set as a suburb and Sutton Coldfield is not.

Before I go retagging stuff I thought perhaps we should discuss and agree
how we best tag places within the West Mids conurbation. Something we can
chat about at the next social too if you want to give it some thought.

Cheers
Andy


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[Talk-gb-westmidlands] 1:25k OS OOC mapping for Stafford and Cannock areas

2011-02-15 Thread Andy Robinson (blackadder-lists)
I've added a few more OS 1:25k OOC maps in the north of our region, Stafford
specifically:

http://ooc.openstreetmap.org/?zoom=15lat=52.80764lon=-2.11929layers=000B0

The low zoom tiles will catch up at some point.

To use this layer when editing see:
http://wiki.openstreetmap.org/wiki/Provisional/First_Edition

Cheers
Andy


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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Tom Chance
On 14 February 2011 21:15, Laurence Penney l...@lorp.org wrote:

 One rambling question for now... As one maps an area in such detail, what
 kind of principle do you operate when you encounter useful information that
 can't yet usefully[1] go into OSM for now. The blurry lines between pub,
 bar, cafe, restaurant and fast food are well-known examples, that I am often
 tempted to represent using the semicolon. Buildings with multiple uses, such
 as art centres with galleries, cinemas and cafe-bars, are another common
 complexity for which multiple nodes feels like a hack that will cause too
 much information, or at least too much text, on most renderers. And you
 mention the issue of multiple floors - Bristol's new Cabot Circus shopping
 centre is a scary mapping prospect on that score alone. Maybe in other words
 I'm asking: how often and with what methodology do you use the 'note' key?


I've had the same problem.

As a rule of thumb for the bar/cafe/restaurant scenario I just go with the
main use. Most restaurants have bars, most cafes serve some sort of food, we
have to decide at some point which kind of amenity it is.

For places like art centres I similarly assume that if it's big it probably
has a bar or cafe, etc. If you see an arts centre on a map, chances are you
know if it has a bar or at least you can ask at reception. The main problem
with this is where somebody wants to pull off data for bars and they don't
get a really well loved bar in an arts centre. Data, rather than map, users
are unlikely to use judgement quite so well for each individual case. The
solution would be something like the toilets tag, but that could end up
simply turning amenity=cafe into cafe=yes for every amenity tag!

Multi-floor buildings are tricky. Most are homes on top of a shop, which I
ignore, but if there is for example a separate cafe on top of a shop I'd put
a duplicate polygon on top.

Now I have two reasons to be glad for the lack of shopping malls round my
way!

Tom

-- 
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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Laurence Penney
On 15 Feb 2011, at 11:56, Tom Chance wrote:

 On 14 February 2011 21:15, Laurence Penney l...@lorp.org wrote:
 One rambling question for now... As one maps an area in such detail, what 
 kind of principle do you operate when you encounter useful information that 
 can't yet usefully[1] go into OSM for now. The blurry lines between pub, bar, 
 cafe, restaurant and fast food are well-known examples, that I am often 
 tempted to represent using the semicolon. Buildings with multiple uses, such 
 as art centres with galleries, cinemas and cafe-bars, are another common 
 complexity for which multiple nodes feels like a hack that will cause too 
 much information, or at least too much text, on most renderers. And you 
 mention the issue of multiple floors - Bristol's new Cabot Circus shopping 
 centre is a scary mapping prospect on that score alone. Maybe in other words 
 I'm asking: how often and with what methodology do you use the 'note' key?
 
 I've had the same problem.
 
 As a rule of thumb for the bar/cafe/restaurant scenario I just go with the 
 main use. Most restaurants have bars, most cafes serve some sort of food, we 
 have to decide at some point which kind of amenity it is.

We have to... Why? If there are things that are undoubtedly cafe-bars in the 
world, with its main use depending whether you're a pensioner or a hipster 
(Bristol has at least 10 such on Gloucester Road alone), why on earth can they 
not be mapped? Even if Mapnik doesn't like semicolons, it might still accept 
the string cafe;bar (and bar;cafe), or cafe-bar. In France there are tens 
of thousands of cafe-bar-tabacs - currently they're mapped with a random value 
from that lot, which is crazy.

What I hate most of all is the loss of information that occurs at the have to 
decide at some point stage. The note field could save some of this usefully, 
even if unstructured in form.

Sorry for the rant!

- L

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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Tom Chance
On 15 February 2011 13:36, Laurence Penney l...@lorp.org wrote:

 We have to... Why? If there are things that are undoubtedly cafe-bars in
 the world, with its main use depending whether you're a pensioner or a
 hipster (Bristol has at least 10 such on Gloucester Road alone), why on
 earth can they not be mapped? Even if Mapnik doesn't like semicolons, it
 might still accept the string cafe;bar (and bar;cafe), or cafe-bar. In
 France there are tens of thousands of cafe-bar-tabacs - currently they're
 mapped with a random value from that lot, which is crazy.


Yes, fair enough.



 What I hate most of all is the loss of information that occurs at the have
 to decide at some point stage. The note field could save some of this
 usefully, even if unstructured in form.


I'd appeal against using note for anything other than notes to fellow
mappers, e.g. as a reminder to go back and add both cafe/bar uses when we
work out the tagging. It's not much use when processing data.

Tom


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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Ed Avis
Andy Robinson (blackadder-lists ajrlists@... writes:

http://blog.mappa-mercia.org/2011/02/whats-in-postcode.html

Great work!  How can you tell when you have every postcode and is there some way
of checking them against the OS OpenData postcode centroids?

-- 
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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Andy Allan
On Tue, Feb 15, 2011 at 1:36 PM, Laurence Penney l...@lorp.org wrote:
 Even if Mapnik doesn't like semicolons,

Urggh, *I* don't like semi-colons, and I'd suggest that any
solutions involving them are simply workarounds!

Cheers,
Andy

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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Andy Robinson (blackadder-lists)
Hi Lawrence,

I tend to try and tag stuff with its primary purpose. If I really do think
its more than one then I either split the object up (eg separate retail
outlets within one building) or occasionally use a semicolon (like on bus
stops to denote the multitude of route_ref's). Anything more complicated I
ignore (though I may have made a note) on the basis that the low hanging
fruit rule ok!

I use the note tag mostly for some piece of information I want to convey to
the next person visiting the object.

Cheers
Andy

-Original Message-
From: Laurence Penney [mailto:l...@lorp.org]
Sent: 14 February 2011 9:15 PM
To: Andy Robinson (blackadder-lists)
Cc: talk-gb@openstreetmap.org
Subject: Re: [Talk-GB] B72 is a wrap

Stunning work, Andy. I've recently been pointing people to Sutton Coldfield
as
an example of the standard to which we Bristolians should be aspiring.

One rambling question for now... As one maps an area in such detail, what
kind of principle do you operate when you encounter useful information that
can't yet usefully[1] go into OSM for now. The blurry lines between pub,
bar,
cafe, restaurant and fast food are well-known examples, that I am often
tempted to represent using the semicolon. Buildings with multiple uses,
such
as art centres with galleries, cinemas and cafe-bars, are another common
complexity for which multiple nodes feels like a hack that will cause too
much
information, or at least too much text, on most renderers. And you mention
the issue of multiple floors - Bristol's new Cabot Circus shopping centre
is a
scary mapping prospect on that score alone. Maybe in other words I'm
asking:
how often and with what methodology do you use the 'note' key?

- L

[1] i.e. render, or be useful in other well-known OSM-powered services...
or
at least be added without confusing simple-minded renderers that can't
handle amenity=cafe;bar

On 14 Feb 2011, at 13:31, Andy Robinson (blackadder-lists) wrote:

 http://blog.mappa-mercia.org/2011/02/whats-in-postcode.html

 Cheers
 Andy


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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Jerry Clough : SK53 on OSM

On 15/02/2011 15:32, Ed Avis wrote:

Andy Robinson (blackadder-listsajrlists@...  writes:


http://blog.mappa-mercia.org/2011/02/whats-in-postcode.html

Great work!  How can you tell when you have every postcode and is there some way
of checking them against the OS OpenData postcode centroids?

I did do a little experiment some time ago (but you do need postcodes 
assigned to buildings):

http://www.flickr.com/photos/sk53_osm/5333098864

I was going to write up some more but Chris Hill 
http://chris-osm.blogspot.com/2011/01/using-gb-postcodes.html beat me 
to it.


Jerry
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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Andy Robinson (blackadder-lists)
Lawrence,

One thing I forgot to add. On occasion where it's difficult to add stuff
without it conflicting with something else (like a snooker hall over shops
for example) I might make closed ways for the retail units and then simply
add a node for the snooker hall. Better than ignoring the data completely.
In a couple of occasions this week I have tried overlapping closed ways over
each other (some shared boundaries some not) to represent diffent uses at
different levels. It sort of works in the model ok but it doesn't render
well.

Cheers
Andy

-Original Message-
From: Laurence Penney [mailto:l...@lorp.org]
Sent: 14 February 2011 9:15 PM
To: Andy Robinson (blackadder-lists)
Cc: talk-gb@openstreetmap.org
Subject: Re: [Talk-GB] B72 is a wrap

Stunning work, Andy. I've recently been pointing people to Sutton Coldfield
as
an example of the standard to which we Bristolians should be aspiring.

One rambling question for now... As one maps an area in such detail, what
kind of principle do you operate when you encounter useful information that
can't yet usefully[1] go into OSM for now. The blurry lines between pub,
bar,
cafe, restaurant and fast food are well-known examples, that I am often
tempted to represent using the semicolon. Buildings with multiple uses,
such
as art centres with galleries, cinemas and cafe-bars, are another common
complexity for which multiple nodes feels like a hack that will cause too
much
information, or at least too much text, on most renderers. And you mention
the issue of multiple floors - Bristol's new Cabot Circus shopping centre
is a
scary mapping prospect on that score alone. Maybe in other words I'm
asking:
how often and with what methodology do you use the 'note' key?

- L

[1] i.e. render, or be useful in other well-known OSM-powered services...
or
at least be added without confusing simple-minded renderers that can't
handle amenity=cafe;bar

On 14 Feb 2011, at 13:31, Andy Robinson (blackadder-lists) wrote:

 http://blog.mappa-mercia.org/2011/02/whats-in-postcode.html

 Cheers
 Andy


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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Andy Robinson (blackadder-lists)
Ed Avis [mailto:e...@waniasset.com] wrote:
Sent: 15 February 2011 3:32 PM
To: talk-gb@openstreetmap.org
Subject: Re: [Talk-GB] B72 is a wrap

Andy Robinson (blackadder-lists ajrlists@... writes:

http://blog.mappa-mercia.org/2011/02/whats-in-postcode.html

Great work!  How can you tell when you have every postcode and is there
some way of checking them against the OS OpenData postcode centroids?

Just by being systematic. If you have Chillly's codepoint postcode layer
sitting over BING its easy in the editor to assign the postcodes as you see
them when adding buildings. In retail areas things go awry a bit (like many
traditional banks seeming  to have a unique postcode) but its easy enough to
check the main retail chain's websites for their correct addresses to make
sure you have used the right postcode and other than for larger buildings
mostly even runs of retail units share the same postcode, even in my local
shopping mall.

Cheers
Andy



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[Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap)

2011-02-15 Thread Ed Avis
Andy Robinson (blackadder-lists ajrlists@... writes:

Great work!  How can you tell when you have every postcode and is there
some way of checking them against the OS OpenData postcode centroids?

Just by being systematic. If you have Chillly's codepoint postcode layer
sitting over BING its easy in the editor to assign the postcodes as you see
them when adding buildings.

http://www.raggedred.net/codepoint/

I see - so you can use your judgement to work out the area of a postcode based
on its centroid and the streets and buildings nearby.

Since this isn't using any kind of ground survey to check the data, I wonder if
it would be a suitable task for a bot?  A program making guesses about postcode
areas might not be any more fallible than a human doing the same task.  Of 
course
it could only be done in areas that had already reached a high standard of
completeness, ideally with buildings traced as well as streets.

Or, perhaps, the robot could make suggestions which a human would then accept or
reject, so that 95% of the area could be covered, with human assistance for the
last few tricky bits.

-- 
Ed Avis e...@waniasset.com


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Re: [Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap)

2011-02-15 Thread Andy Robinson (blackadder-lists)
Ed Avis [mailto:e...@waniasset.com] wrote:
Sent: 15 February 2011 5:24 PM
To: talk-gb@openstreetmap.org
Subject: [Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap)

Andy Robinson (blackadder-lists ajrlists@... writes:

Great work!  How can you tell when you have every postcode and is
there
some way of checking them against the OS OpenData postcode centroids?

Just by being systematic. If you have Chillly's codepoint postcode
layer sitting over BING its easy in the editor to assign the postcodes
as you see them when adding buildings.

http://www.raggedred.net/codepoint/

I see - so you can use your judgement to work out the area of a postcode
based on its centroid and the streets and buildings nearby.


It's not that simple. You need to do the ground survey first to get the
house numbers and work out which property belongs to which street. Once
you know that you can then assign the postcode. All the area of B72 I mapped
out has been walked to get the building numbers first.

Cheers
Andy



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Re: [Talk-GB] Armchair-mapping postcodes

2011-02-15 Thread Jerry Clough : SK53 on OSM

On 15/02/2011 17:23, Ed Avis wrote:

Andy Robinson (blackadder-listsajrlists@...  writes:


Great work!  How can you tell when you have every postcode and is there

some way of checking them against the OS OpenData postcode centroids?

Just by being systematic. If you have Chillly's codepoint postcode layer
sitting over BING its easy in the editor to assign the postcodes as you see
them when adding buildings.

http://www.raggedred.net/codepoint/

I see - so you can use your judgement to work out the area of a postcode based
on its centroid and the streets and buildings nearby.

Since this isn't using any kind of ground survey to check the data, I wonder if
it would be a suitable task for a bot?  A program making guesses about postcode
areas might not be any more fallible than a human doing the same task.  Of 
course
it could only be done in areas that had already reached a high standard of
completeness, ideally with buildings traced as well as streets.

Or, perhaps, the robot could make suggestions which a human would then accept or
reject, so that 95% of the area could be covered, with human assistance for the
last few tricky bits.

This just doesn't work. The example I pointed to has shared 
semi-detached house which have different postcodes: there is no way in 
which any program could work this out, unless it already has 
housenumbers which have been mapped using, /inter alia/, shoe leather. 
Adding postcodes to ground surveyed data is relatively trivial, do not 
assume that the operation is commutative.
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Re: [Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap)

2011-02-15 Thread Ed Avis
Andy Robinson (blackadder-lists ajrlists@... writes:

http://www.raggedred.net/codepoint/

I see - so you can use your judgement to work out the area of a postcode
based on its centroid and the streets and buildings nearby.


It's not that simple. You need to do the ground survey first to get the
house numbers and work out which property belongs to which street.

Ah, right.  I thought it sounded too good to be true!  Jerry C. also pointed out
that house numbers have to be present.

So the ground survey is to add the house numbers - or I suppose just addr:street
would be sufficient in most cases? - and then the armchair part is putting those
together with the code point data to find buildings in a particular postcode.

OSM's coverage of streets is much better than its coverage of buildings.  Might
it make sense to tag postcodes on ways?

-- 
Ed Avis e...@waniasset.com


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Re: [Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap)

2011-02-15 Thread Andy Robinson (blackadder-lists)
Ed Avis [mailto:e...@waniasset.com] wrote:
Sent: 15 February 2011 5:40 PM
To: talk-gb@openstreetmap.org
Subject: Re: [Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap)

Andy Robinson (blackadder-lists ajrlists@... writes:

http://www.raggedred.net/codepoint/

I see - so you can use your judgement to work out the area of a
postcode based on its centroid and the streets and buildings nearby.


It's not that simple. You need to do the ground survey first to get the
house numbers and work out which property belongs to which street.

Ah, right.  I thought it sounded too good to be true!  Jerry C. also
pointed out
that house numbers have to be present.

So the ground survey is to add the house numbers - or I suppose just
addr:street would be sufficient in most cases? - and then the armchair part
is
putting those together with the code point data to find buildings in a
particular
postcode.

OSM's coverage of streets is much better than its coverage of buildings.
Might it make sense to tag postcodes on ways?

Nope, streets often have more than one postcode for the properties on that
street. It's not the street that has a postcode anyway, it's the delivery
points for the mail, i.e. the letterbox in your front door. Hence why I only
tag the building with the full postcode.

Cheers
Andy


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Re: [Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap)

2011-02-15 Thread Ed Avis
Andy Robinson (blackadder-lists ajrlists@... writes:

OSM's coverage of streets is much better than its coverage of buildings.
Might it make sense to tag postcodes on ways?

Nope, streets often have more than one postcode for the properties on that
street. It's not the street that has a postcode anyway, it's the delivery
points for the mail, i.e. the letterbox in your front door.

That is true.  But given that in many areas we have good streets but not good
buildings, there may be value in adding a simplified version of the postcode
data in which a way is tagged with the postcode(s) that apply along it.

The use case I am thinking of is the common 'enter your postcode' on business
websites or over the telephone.  Given a postcode you can find the street (or
streets) which it corresponds to.  This means that a house number plus postcode
is sufficient to make the whole address.

A simplified tagging of postcode=x;y on a way would let OSM be used to map
postcode to street name.  It would not be quite as precise as the PAF,
giving two possible streets in some cases where there is only one in reality.
But it might be useful for small organizations who want to give people an easy
way to enter their address, without paying for the PAF data.  (Potentially, a
web service could offer this lookup and feed back statistics on which streets
were chosen, to be used to fix up the OSM data.)

By no means should tagging postcode on ways replace the more thorough building-
by-building survey with street numbers, but it might be a first step, just as
we usually tend to put the street network in first with no buildings and come
back for the extra detail later.

-- 
Ed Avis e...@waniasset.com


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Re: [Talk-GB] B72 is a wrap

2011-02-15 Thread Chris Hill

On 15/02/11 16:42, Jerry Clough : SK53 on OSM wrote:
I did do a little experiment some time ago (but you do need postcodes 
assigned to buildings):

http://www.flickr.com/photos/sk53_osm/5333098864

I was going to write up some more but Chris Hill 
http://chris-osm.blogspot.com/2011/01/using-gb-postcodes.html beat 
me to it.


I have only loaded the post code areas people have requested. If anyone 
needs extra areas loading just email me with the postcode area (e.g. HU) 
you would like to see.


These work as overlays in PL2  JOSM from zoom level 15 up. I may have 
to change this to display from zoom level 16 up. I think this doesn't 
affect the usefulness because the more detailed levels are most use, but 
does anyone disagree?


--
Cheers, Chris
user: chillly


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[Talk-GB] Fwd: [OSM-legal-talk] per changeset relicensing

2011-02-15 Thread Matt Amos
i know being able to agree to the new CTs is a concern for some
people, especially with sources which may have been used in only a
small number of edits. one potential solution could be allowing each
changeset to carry some relicensability information, as richard sets
out below. there's a survey at the end so that we (LWG) can determine
if this would be a useful feature or not, and i encourage everyone to
have a think about it and have a go at the survey.

cheers,

matt


-- Forwarded message --
From: Richard Weait rich...@weait.com
Date: Tue, Feb 1, 2011 at 4:38 PM
Subject: [OSM-legal-talk] per changeset relicensing
To: Licensing and other legal discussions. legal-t...@openstreetmap.org


There have been previous discussions regarding per changeset relicensing.

I'd like to know if developing the tools to allow per changeset
relicensing is worthwhile.  There will be some effort involved in the
coding, so it would be good to know in advance if this option will be
used by many or few mappers.

The intent of per changeset relicensing is to permit those with a
general agreement to the terms and license, but with a specific
concern about a source for a particular changeset to relicense their
data, but not relicense that data about which they are concerned.

Example:

Prof. Mapper maps by GPS and survey as she travels.  She also helped a
friend map in Erehwon, and added street names from Erehwon Council
data.  Erehwon council have given permission for derivation to OSM
under CC-By-SA, but discussion is continuing re: CT/ODbL, Prof. Mapper
agrees with CT/ODbL but recognizes that She doesn't have permission
yet to relicense the Erehwon street names.

Prof. Mapper could accept CT/ODbL for the bulk of her mapping, and
mark the seven Erehwon changesets a with a checkbox for Do Not
Relicense and with a note, Pending Erehwon Council permission.

This allows several options in the future. It points out datasets and
mappers with interest in discussing relicensing with a specific data
provider.  Should Erehwon Council agree to ODbL prior to any change
over date, the data can be included. If not, Prof. Mapper may continue
with their unencumbered data.



http://www.surveymonkey.com/s/WFVK6XS

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[Talk-GB] A way of getting more footpaths done? - tagged track segments

2011-02-15 Thread Nick Whitelegg
Some of the comments on the Android apps thread over on talk got me thinking 
about approaches to try and get more of the UK rights of way network done, 
particularly by contributors who may not wish to use a full scale editor.

Was thinking of a two stage approach, involving a relatively non techie 
person with a smartphone app, and an expert OSM editor with a JOSM plugin. It 
could work something like this. Someone could go out for a walk, fire up a 
smartphone app, and each time they start walking along a new right of way, 
select the right of way type using a simple interface. Their route would be 
recorded as a GPX track, and each time they change the current right of way 
type, a new trkseg is created, tagged with the right of way type. On 
completing their walk they could upload this track to a server.

Then, an expert OSM editor could do the actual data editing, using a JOSM 
plugin which downloads these tagged GPX tracks and renders each trkseg in a 
different colour depending on the right of way represented by that trkseg. 
Expert editors willing to be part of this system could subscribe to an RSS feed 
of new GPX uploads in their area.

Any feelings on this?

Nick

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Re: [Talk-GB] A way of getting more footpaths done? - tagged track segments

2011-02-15 Thread SomeoneElse

On 15/02/2011 20:28, Nick Whitelegg wrote:


Any feelings on this?

First things first, more GPS tracks are definitely useful, even if 
there's no other information recorded.  For example, if I've walked from 
A to B and recorded one GPS track, and no-one else has been there (which 
is true a lot of the time) then anything that I plot is going to be 
iffy.  More traces automatically uploaded (to somewhere, somehow) from 
more people would be really useful.


However, even when you've only recently been somewhere it's sometimes 
difficult to decide how to record something properly (i.e. 
footway/bridleway/cycleway/path vs track, surface, etc.).  Obviously any 
extra information is useful to add to yours if you've been there, but 
I'm not sure that I'd want to add data for places that I hadn't been to 
based on someone else's track recording.


Besides (notwithstanding the rubbish weather of the last couple of days) 
the nights are getting lighter and I don't fancy spending more time in 
front of a keyboard than I need to!


Cheers,
Andy

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[Talk-GB] OSM Pub Meet Nottingham Tueday 8th March

2011-02-15 Thread Jerry Clough : SK53 on OSM

Just a quick announcement.

A first pub meet for OSM mappers in the extended Nottingham area is 
scheduled for Tuesday 8th March at the John Borlase Warren 
http://osm.org/go/eu8ZoGm84--, Canning Circus, Nottingham NG7 3GD. 
from 19:30 onwards.


Wiki page at: http://wiki.openstreetmap.org/wiki/Nottingham/Pub_Meetup

Cheers,

Jerry Clough
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