[OSM-talk] razed railways and other things that don't exist today

[Warin]

On 6/12/22 06:39, Mike Thompson wrote:
>
>
> On Mon, Dec 5, 2022 at 11:22 AM Minh Nguyen via talk 
> <talk at openstreetmap.org> wrote:
>
>     Vào lúc 09:55 2022-12-05, Zeke Farwell đã viết:
>     > That is a good summary, though "Once the OSM available satellite
>     imagery
>     > does not show the feature"
>
> 1) There are other sources that an armchair mapper can use other than 
> imagery, such as the Strava Global Heatmap, the USGS 3 DEP data (in 
> the US), and GPX data that has been uploaded to the OSM server.
> 2) The term "satellite imagery" also excludes street level imagery, 
> such as Mapillary
> 3) Technically some of the imagery we refer to as "satellite" is 
> really "aerial."
>
> "Once the feature truly no longer exists and is no longer evident in 
> any of the available remote sources commonly used to edit OSM, 
> including overhead imagery (satellite/aerial/drone), street level 
> imagery (e.g. Mapillary), GPS traces/heatmaps (e.g. Strava), and 
> elevation data (e.g. USGS 3DEP) the feature can be deleted"
>
>
>

I have abbreviated the above to be;

"The following tags function is to reduce the possibility of a mapper 
remapping the feature from existing available sources used to edit OSM, 
e.g. satellite or aerial imagery, that shows the old state of the 
feature. Once the OSM available sources do not show the feature, the 
feature can safely be removed from OSM. Renders cannot rely on OSM 
preserving physically vanished history. "


I don't want to use too many words .. so as not to obscure the basic 
intention. Listing all the possible sources is not necessary...
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