Clicking on JOSM link while zoomed out takes you to the wrong area

[pnorman]

When I am zoomed out and click the link for an error on node 5164325981 JOSM loads the wrong area. If I zoom in, I get the correct area when I click the link. I suspect coordinate rounding, as the area I am sent to is nearby, but does not contain the error.

[lonvia]

From the chat:

< pnorman> Anyways, that's my guess as to what's happening. Let me dig into 
           the VTs
< pnorman> Yep, confirmed it. The VTs only contain the street and OSM ID 
           information. This means that the only possible place to get the 
           position information is from the VTs. MVTs are a NxN grid of 
           points (typ. N=4096), similar to how raster tiles are a MxM grid 
           of squares (typ. M=256). This means that there is an error in 
           saying where something is based on the VTs
< lonvia> So we should create them with higher resolution?
< pnorman> in particular, the error in meters is 40000000/2^z/N. Looking at 
           the VTs, I guess N to be 512, which puts the error at 20m at z10. 
           z10 is pretty far out, but with fractional zooms, you might be at 
           10.99, and that's a comfortable zoom for metro vancouver for 
           layers where there's only a couple of errors
< pnorman> Two approaches. The first, and easiest, is to increase the 
           resolution (extent) so that the error is < the bounding box buffer.
< pnorman> The right way is to add lat and lon attributes to the points in 
           the VT. This is actually important in the case of the place nodes 
           close layer, where you present two edit links, each of which 
           should go to their own location but doesn't.