[talk-au] Discussion E: how to find faults in maps

[David Wales]

An example from the page Warin linked which may interest you is the
[Bicycle Tags map][1].
[1]: https://wiki.openstreetmap.org/wiki/Bicycle_tags_map)

For example, [here is Canberra][2] with all 'highway=cycleway' and
'bicycle=yes' tagged ways highlighted:
[2]:
http://mijndev.openstreetmap.nl/~ligfietser/fiets/index.html?map=cycleways&zoom=13&lat=-35.32063&lon=149.12057&layers=B000000TFFFFFFFFFTFFFFFFFF

Another link from the page Warin mentioned is [Osmose][3].
[3]: https://wiki.openstreetmap.org/wiki/Osmose

Here is [an example][4] with just cycleway errors flagged in Canberra:
[4]:
http://osmose.openstreetmap.fr/en/map/#zoom=13&lat=-35.2845&lon=149.122&item=xxxx&level=1%2C2%2C3&tags=cycleway&fixable=

If you have some knowledge of a tag that should be applied, you can use
JOSM filters to find which ways are missing the tag. For example, I use
filters to find roads which are missing speed limits.

Here are an [introduction][5] and [documentation][6] for JOSM filters.
[5]: https://blog.mapbox.com/using-filters-in-josm-99a7415f6235
[6]: https://josm.openstreetmap.de/wiki/Help/Dialog/Filter

An example filter is ('|' means inclusive 'OR'):

    highway=cycleway | bicycle=yes | bicycle=designated
   
By default, filters hide the selected tags. I have selected the 'invert'
option to hide everything except the selected tags.

See an [example of the above filter][7] here.
[7]: https://imgur.com/VNmUDWN

Regards,
David Wales

On 29/9/19 8:50 am, Warin wrote:
> On 29/09/19 07:30, Herbert.Remi via Talk-au wrote:
>>
>> I welcome your comments.
>>
>
> 1) This is not Australian specific.
> 2) The topic is an FAQ
> 3) Before you post .. do some research
>
> Read and use the tools from here.... 
> https://wiki.openstreetmap.org/wiki/Quality_assurance
>
> There are at least 264 fixmes in the ACT, that is more than 'dozens'
> you state.
>
>
>
> _______________________________________________
> Talk-au mailing list
> Talk-au at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-au

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