Bug 11410 – Blue tiles on the map

Bug 11410 - Blue tiles on the map


Summary:	Blue tiles on the map

Status:	RESOLVED FIXED

Product:	Evopedia
Component:	General
Version:	unspecified
Platform:	x86 Ubuntu

Importance:	Unspecified normal (vote)
Target Milestone:	---
Assigned To:	christian
QA Contact:	general

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree

Reported:	2010-10-16 21:17 UTC by mossroy
Modified:	2010-11-21 18:12 UTC (History)
CC List:	1 user (show)

See Also:

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Description mossroy (reporter) 2010-10-16 21:17:30 UTC

SOFTWARE VERSION:
0.4.1

EXACT STEPS LEADING TO PROBLEM: 
1. open a map, for example http://127.0.0.1:8080/wiki/en/Germany
2. zoom in many times, in order to exceed the maximum zoom level of
openstreetmap. In the example above, you have to zoom in 14 times
3. try to drag the map

EXPECTED OUTCOME:
The map should always be displayed. Maybe the zoom option should be disabled
when the maximum zoom level is reached

ACTUAL OUTCOME:
The map is replaced by blue tiles. Many zoom outs does not make it come back.
If I open other maps, I sometimes get blue tiles instead of the correct one
and/or incorrect tiles (coming from another part of the globe)

REPRODUCIBILITY:
always

EXTRA SOFTWARE INSTALLED:
none

OTHER COMMENTS:
I had this problem on a Ubuntu platform : I could not try on other ones.
I'm not sure that the problem comes from excessive zooming. But at least it
occurs in this case

User-Agent:       Mozilla/5.0 (X11; U; Linux x86_64; fr; rv:1.9.2.10)
Gecko/20100915 Ubuntu/10.04 (lucid) Firefox/3.6.10

Comment 1 christian 2010-10-18 21:22:45 UTC

The source code for the map component has been changed a lot, so it is very
likely that this bug is gone in the next version. I will check that once the
map code is stable enough again.

Comment 2 mossroy (reporter) 2010-10-22 15:38:02 UTC

*** Bug 11417 has been marked as a duplicate of this bug. ***

Comment 3 mossroy (reporter) 2010-11-18 15:57:19 UTC

I still have this behavior in 0.4.2 (not final, taken from git)

Comment 4 christian 2010-11-19 20:15:32 UTC

(In reply to comment #3)
> I still have this behavior in 0.4.2 (not final, taken from git)
> 

Sorry, but I cannot reproduce that for the current git version under ubuntu.
The zoom factor should be correctly limited now.

Comment 5 mossroy (reporter) 2010-11-20 12:38:54 UTC

I don't think it is related to an excessive zoom factor.
I tried to remove the ~/.cache/maps directory to see if it could be related to
invalid tiles in the cache : same behavior.

To illustrate the problem, I recorded a small video : you can download it at
http://dl.free.fr/lp6uDvvZu
I recorded it after removing the .cache/maps directory

You'll see that I only need to zoom once, and that the problem appears only
when I try to drag the map.
It seems that, at the moment I try to drag the map, Evopedia moves me to
another place on the globe. I suppose the blue tiles where simply because I was
moved somewhere in the sea.

Comment 6 christian 2010-11-21 18:12:02 UTC

This bug is fixed now. It only occurred when zooming via the menu.