id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
15576	Reprojection error	Polarbear-j	team	"I get the tile-offsets as shown in the attachment when particular imagery layers are reprojected.

How to reproduce:
Set Mercator/EPSG:3857, load Berlin 2011.

Tiles are shifted, retrieved as epsg 4326:

{{{
2017-11-20 11:17:56.652 INFO: GET http://fbinter.stadt-berlin.de/fb/wms/senstadt/k_luftbild2011_20?FORMAT=image/png&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=0&STYLES=&SRS=EPSG:4326&WIDTH=512&HEIGHT=512&BBOX=13.3717263,52.4665849,13.3730996,52.4679582 -> 200
}}}

When I switch JOSM to epsg:25833, it retrieves the images again in native projection and displays them fine. 

I had tried to clear the cache for this layer, but behaviour remains. 

Set Mercator/EPSG:3857, load Berlin 2013, which does not show the problem: 
However JOSM retrieves Epsg 25832:

{{{
2017-11-20 11:23:21.729 INFO: GET http://fbinter.stadt-berlin.de/fb/wms/senstadt/k_luftbild2013?FORMAT=image/png&TRANSPARENT=TRUE&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=0&STYLES=&SRS=EPSG:25832&WIDTH=512&HEIGHT=512&BBOX=796920.1153236,5821941.6414557,796996.5523486,5822018.0784807 -> 200
}}}


Well, it might be the case that the fault comes from the server when delivering epsg 4326. If that is the case, I'd need a method to nail the imagery layer to be retrieved in their native format (e.g. always 25833)

{{{
Identification: JOSM/1.5 (13064 en) Mac OS X 10.11.6
OS Build number: Mac OS X 10.11.6 (15G1611)
Memory Usage: 2284 MB / 3641 MB (1088 MB allocated, but free)
Java version: 1.8.0_131-b11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: Display 69733312 2048x1280, Display 725111823 1680x1050
}}}

[[Image(projection-artefact.jpg, 1000px)]]"	defect	closed	normal		Core imagery	latest	othersoftware