Jonas Reinhardt ( 
https://osgeo-org.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A70f00bd6-6526-4c7a-8c5e-567c3ddf006d
 ) *created* an issue

GeoServer ( 
https://osgeo-org.atlassian.net/browse/GEOS?atlOrigin=eyJpIjoiNWNlMDFkODljMzkxNDRhYmJmODkwMzQ4NGZmYjY3YTciLCJwIjoiaiJ9
 ) / Bug ( 
https://osgeo-org.atlassian.net/browse/GEOS-10039?atlOrigin=eyJpIjoiNWNlMDFkODljMzkxNDRhYmJmODkwMzQ4NGZmYjY3YTciLCJwIjoiaiJ9
 ) GEOS-10039 ( 
https://osgeo-org.atlassian.net/browse/GEOS-10039?atlOrigin=eyJpIjoiNWNlMDFkODljMzkxNDRhYmJmODkwMzQ4NGZmYjY3YTciLCJwIjoiaiJ9
 ) Strange result from geotiff raster depending on resolution ( 
https://osgeo-org.atlassian.net/browse/GEOS-10039?atlOrigin=eyJpIjoiNWNlMDFkODljMzkxNDRhYmJmODkwMzQ4NGZmYjY3YTciLCJwIjoiaiJ9
 )

Issue Type: Bug Affects Versions: 2.17.2 Assignee: Unassigned Attachments: 
orto-correct.png, orto-error.png Components: WMS Created: 27/Apr/21 3:08 PM 
Environment:

Windows Server 2012 R2
Oracle Corporation: 1.8.0_211 (Java HotSpot(TM) 64-Bit Server VM)

Priority: Low Reporter: Jonas Reinhardt ( 
https://osgeo-org.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A70f00bd6-6526-4c7a-8c5e-567c3ddf006d
 )

We usually prepare our ortophotos with few pyramids, and usually we align the 
fetched resolution to these pyramids.
A few times a strange phenomenon of repetitive tiles appear for one zoom level.

The example GeoTiff consist of 3 overviews-pyramids:
Base: 32918x51348
Overview1: 10973x17116
Overview2: 3658x5706
Overview3: 1220x1902
Which can be expressed as resolutions (m/pixel)
Resolution: 1.34909836065574,0.449945325314379,0.149995443360977,0.05

If we use resolutions:
… 0.44995, *0.29999* ,0.15 …
we get the strange result

if we change to:
… 0.44995, *0.3,0.2* ,0.15 …
it disapears.

Perhaps this is known bug and bad practice to align the resolutions to the 
internal overviews, otherwise it is just strange.

Example map with phenomenon
http://maps.projektnav.net/2021/m291az6Tt2v.htm ( http://maps.projektnav.net )

( 
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 ) Add Comment ( 
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