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Increase precision when moving background imagery in Potlatch #2433

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openstreetmap-trac opened this issue Jul 23, 2021 · 3 comments
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@openstreetmap-trac
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Reporter: lakeyboy
[Submitted to the original trac issue database at 6.30pm, Tuesday, 10th November 2009]

Over in Australia, we have recently been blessed with new CC-BY-SA high resolution imagery which we can trace over, provided by NearMap. Only problem is, this imagery can't be used to trace over in the city of Melbourne, Australia due to the misalignment of the NearMap imagery. I've tried moving it with the Potlatch move background imagery command (space + drag) but the current 'blocky' style of movement of the imagery results in the imagery not being able to line up at all. I am suggesting a 'smooth' movement of the imagery, to enable precise line up with the data. Thanks.

To test out this problem, go to http://www.openstreetmap.org/edit?lat=-37.694196&lon=144.915294&zoom=18 and place this URL in the custom imagery section in options: http://www.nearmap.com/maps/nml=Very&zxy=!,!,!

@openstreetmap-trac
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Author: Richard
[Added to the original trac issue at 11.37pm, Tuesday, 10th November 2009]

That's lovely imagery!

If you hold space and press the cursor keys, it will move in small increments.

Do you need it finer than that? If so, how much (e.g. "half the increment")?

@openstreetmap-trac
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Author: lakeyboy
[Added to the original trac issue at 4.01am, Wednesday, 11th November 2009]

Thanks for the tip, but it needs to be finer. It looks like it needs to be able to move in "third the increments" for the data to accurately line up with the imagery.

@openstreetmap-trac
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Author: Richard
[Added to the original trac issue at 11.01am, Wednesday, 11th November 2009]

Ok, revision committed with a fine adjustment at z17+.

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