[OSM-talk] is OSM a fake map.

[Warin]

On 30/12/19 07:46, 80hnhtv4agou--- via talk wrote:
> i am talking about in my own back yard,
> i just hiked a mile down the street to check it out, it was not the 
> same when i was there in
> 1985, but it did not match the mapper either.
> to that end, bing is 2015 or 16,
> as an example the county forest preserve map took from osm, so mappers 
> have copied that and it is wrong
> and how do you see thing under the trees unless you walk it.
> so who is to say that any of OSM is not fake.
> if all mappers are tracing.

I think that tracing in the presence of trees can be done an match the 
most up to date imagery OSM has. Similarly rivers, roads etc.

There is a temptation to 'colour in' the map .. many National Parks 
'local' to me were tagged as tree covered. I have reduced that by 
separating the tree tags from the National Parks and mapping the trees 
separately. In at least some areas I suspect that the 'trees' are really 
scrub .. but until I go there I cannot tell.  Were the original mappers 
wrong to do this? I don't think so - most of these are mostly covered by 
trees, so as a broad brush they were correct and the indication was in a 
broad sense correct. But it lacked some detail that I was able to add .. 
by using imagery remotely! However I do have some local knowledge to aid 
me.

Remotely mapping some things is possible, roads and rivers, tree cover 
are all possible with caution. Remotely mapping use of those trees is 
not possible, nor is the type of tree.. more information than the 
imagery provides is necessary.

If we all seek to improve the map .. things will simple get better. I 
call it polishing, you start with what there is and polish it to improve 
it, removing rough bits, clearing up bad spots.






> *From:* john whelan
> *Sent:* Sunday, December 29, 2019 1:08 PM
> *To:* 80hnhtv4agou at bk.ru
> *Cc:* OSM Talk
> *Subject:* Re: [OSM-talk] is OSM a fake map.
> I'm fairly lucky in that in the last three years nothing much has 
> changed locally.  The highways have stayed much the same.  Most 
> buildings are still there.
> If you use Bing to add things then realistically it fills in gaps in 
> the map.  If you delete things because they are not in Bing that is a 
> quite different matter.
> Does it matter if the mapper lives more than five miles away?  Well 
> I've mapped places a few thousand miles away but they were places I 
> knew very well as I used to live there.
> I don't think OSM will ever be completely accurate.  Having said that 
> it is still very useful for many purposes.
> Cheerio John
> On Sun, 29 Dec 2019, 12:31 80hnhtv4agou--- via talk, 
> <talk at openstreetmap.org> wrote:
>
>     it say in some wiki. to correct what you find wrong on the map,
>     not one“other nearby users” is a current mapper, and all edits in
>     a 5 mile radius are not coming from an on the ground
>     mappers in my area but 20 miles + away and are tracing from bing,
>     and the images on bing in my local area are from
>     2016 so i do not see how the map locally is true, and it is not
>     easy to go and see every thing they have done,
>     no car or bike.
>     every thing i do is backed up by me on mapillary, and in traces.
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