[HOT] data alignment to satellite imagery

Nick Allen nick.allen.54 at gmail.com
Mon May 4 06:26:07 UTC 2015


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)
On 4 May 2015 06:07, "graham" <graham at klunky.co.uk> wrote:

>  Hi,
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> I am new the HOT OSM as well, and am also finding line work not aligned to imagery.
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> 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
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> initially presume that the scale at which the user delineated the road was too small.
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> 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?
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> Graham
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> On 04/05/15 07:26, Kretzer wrote:
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> 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.
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> 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.
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> Experts jump in please, if I am wrong here.
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>  Gesendet: Sonntag, 03. Mai 2015 um 23:45 Uhr
> Von: "Joshua Kennedy" <shuaDK at clovermail.net> <shuaDK at clovermail.net>
> An: 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?
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> Thanks
>
> Joshua
>
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