[OSM-talk] The OSM Applet - let's ditch it for JOSM (was:Mapping Reading, some impressions)

[Etienne]

On 9/6/06, Andy Robinson <Andy_J_Robinson at blueyonder.co.uk> wrote:
>
> This does raise an interesting point. When you have a blank canvas you
> need
> the gps referencing to be able to lay down the basic structure and format.
> But when all the roads streets and other gps gathered features are there
> in
> an area do we consider that its ok to add more details by had without
> reference to the gps or other surveying method?
>
> Personally I feel its ok to add nodes representing buildings since its
> easy
> enough later on to add the building limits if they are survey at a later
> time. I'm less comfortable with a point type object, eg a post_box, simply
> because its still easy to be 50m out in the location. I still therefore
> tend
> to match a photo with the tracklog for placing these.
>
> Comments?


I think this is one of the situations where the source tag can be useful.
If a feature is added from a georeferenced photgraph then it should be
better quality data than the feature that has been added because the user
remembers that it is on that corner:

In the first case: amenity=post_pox, source=photograph

and in the second case: amenity=post_box, source=extrapolation

A user can then make their own judgement about how much they should rely on
the data.  Now I'm starting to imagine navigation software saying "Turn left
at the corner where there might be a post box into a road which is
probablya one way street" ;-)

Etienne


Andy Robinson
> Andy_J_Robinson at blueyonder.co.uk
>
> >-----Original Message-----
> >From: talk-bounces at openstreetmap.org [mailto:talk-
> >bounces at openstreetmap.org] On Behalf Of Tom Chance
> >Sent: 06 September 2006 3:42 AM
> >To: talk at openstreetmap.org
> >Subject: Re: [OSM-talk] The OSM Applet - let's ditch it for JOSM
> >(was:Mapping Reading, some impressions)
> >
> >Ahoy,
> >
> >[I wish I could get to sleep :( ]
> >
> >On Wednesday 06 September 2006 02:33, Collinson Mike wrote:
> >> At 02:34 AM 6/09/2006, Tom Chance wrote:
> >> >But then people like my friend would be likely to load the web page
> >> >and add odd things like pubs, post boxes, etc. For example I'd love
> >> >to have an interactive map of "green Reading" a bit like the Green
> >> >Brighton site, based on OSM data, and allowing people to enter new
> >venues.
> >> >A web-based interface that helped people add small-scale data like
> >> >missing road names, amenities, etc. and all in a very intuitive
> >> >manner might be something to aim for?
> >>
> >> All the current edit functionality is somewhat focused on adding
> >> linear features.  Would there be any demand for a "non-technical"
> >> HTML form-based interface where one could enter a single latitude and
> >> longitude, select "Pub" from a drop-down list, then be prompted to
> >> fill in any values appropriate to a a pub, like 'name' ? I'd be happy
> >> to contribute that in Perl.
> >>
> >> Tom, how would your friend know/record where the pub is
> >> located?  Using a GPS device with a display and noting down the
> position?
> >
> >Going by this conversation with one friend (so fetch your large pinch of
> >salt)
> >I'd suggest that a lot of people would just guess. For example, there's a
> >pub
> >on the corner of these two roads, or this already-entered road is
> >called 'Sleepy Street'. With Reading we have increasingly good coverage
> of
> >the basic data (i.e. roads), but people might like to enter additional
> data
> >that can be done relatively easily without a GPS device, such as:
> >* bus lanes, bus routes, bus stops and the routes they serve
> >* cycle lanes & footpaths inc. those little access paths in residential
> >areas
> >* all kinds of amenities, leisure facilities, etc. that are just nodes
> >
> >I would have thought that, given the scope for general errors in the
> >system,
> >the errors introduced by educated guesswork would be negligible, at least
> >in
> >areas with dense road patterns? I suppose countryside featres might be a
> >bit
> >wayward if they were the product of guesswork! There would also, no
> doubt,
> >be
> >a worry about less 'dedicated' people entering data who might be less
> >careful.
> >
> >For my part I'm inviting friends to tell me of features and if I have the
> >time
> >(perhaps including a necessary cycle ride) I add it for them :o)
> >
> >Regards,
> >Tom
> >
> >--
> >The task of critique is not to denounce the ideals, but to show their
> >transformation into ideologies, and to challenge the ideology in the
> >name of the betrayed ideal (Fromm - Beyond The Chains Of Illusion)
> >
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