[HOT] data alignment to satellite imagery

graham graham at klunky.co.uk
Mon May 4 07:54:56 UTC 2015


Thanks very much Nick for the resource. This has also answered some 
additional questions that I had on vectorisation standards. I must has 
missed this page when I following the tutorials.

Graham


On 04/05/15 14:26, Nick Allen wrote:
>
> Excuse the dodgy typing from my phone.
>
> This may help
>
> http://learnosm.org/en/coordination/remote/#highways---how-to-map
>
> Nick
>
> Volunteer 'Tallguy' for 
> https://wiki.openstreetmap.org/wiki/Humanitarian_OSM_Team
>
> http://www.openstreetmap.org/user/Tallguy
>
> Treasurer, website & Bonus Ball admin for 
> http://www.6thswanleyscouts.org.uk/ (treasurer at 6thswanleyscouts.org.uk 
> <mailto:treasurer at 6thswanleyscouts.org.uk>)
>
> On 4 May 2015 06:07, "graham" <graham at klunky.co.uk 
> <mailto:graham at klunky.co.uk>> wrote:
>
>     Hi,
>
>     I am new the HOT OSM as well, and am also finding line work not aligned to imagery.
>
>     An example might be a line that has been delineated generally following the road but plotted either side of the pixels representing the road. In such a case, I would
>     initially presume that the scale at which the user delineated the road was too small.
>
>
>     This begs the question, is there a standard scale at which we need to interpret the imagery? Is there official documentation or a blog on guidelines on this subject?
>
>
>     Graham
>
>
>
>     On 04/05/15 07:26, Kretzer wrote:
>>     Hi Joshua,
>>     if you do the "fix alignment", you actually move the image, not the data. As far as I know usually Bing is used as the reference imagery, so I would not adjust that. If the other shapes are not aligned, the other people have probably used different imagery and not adjusted that.
>>
>>     Probably there are only some shapes in the wrong place, not all? Then you can adjust those manually or ignore them and ad your features with the default alignment.
>>
>>     Experts jump in please, if I am wrong here.
>>
>>
>>
>>>     Gesendet: Sonntag, 03. Mai 2015 um 23:45 Uhr
>>>     Von: "Joshua Kennedy"<shuaDK at clovermail.net>  <mailto:shuaDK at clovermail.net>
>>>     An:hot at openstreetmap.org  <mailto:hot at openstreetmap.org>
>>>     Betreff: [HOT] data alignment to satellite imagery
>>>
>>>     Hi
>>>
>>>     I'm new to HOT and I'm using the iD editor.
>>>     I'm looking at an area that has shapes which do not align with the
>>>     Bing imagery.  Should I use the "fix alignment" tool before I add
>>>     additional data or just add the features as they appear with the
>>>     current alignment?
>>>
>>>     Thanks
>>>
>>>     Joshua
>>>
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>
>
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