[Tilesathome] Lowzoom Place Labels displaced

Sebastian Spaeth Sebastian at SSpaeth.de
Fri Sep 19 10:35:17 BST 2008


Frederik Ramm wrote:
> Hi,
> 
> Sebastian Spaeth wrote:
>> Fixing this to use proper projection and have labels be displayed 
>> correctly would be awsome. Basically, it would use the correct "Project" 
>> functions in 2-3 places in orp (as the patch you forwarded me once did), 
>>   right? bobkare was interested to do the same in XSLT (apparently they 
>> have cos/sin emulation now), which would make us use proper projection 
>> which would be good anyway. Frederik, do you think you (or somebody 
>> else) could have a go at that?
> 
> Sure, I didn't know the problem was that serious so it was somewhere far 
> down on my stack but you have just raised it a bit ;-)

See also Rob Raid's comments in today's emails. z11 is that far off 
while z12 looks about right (although I have received some complaints 
about z12 misplacements too) that it could actually be something else 
than just a projection issue. Rob pinned the timeframe of a change in 
behavior down to about the time the proximity filter was added. (which 
is also about the time we switched to orp by default? can't remember)

spaetz
--------------------------

Quoting Rob's mail:

http://www.openstreetmap.org/?lat=-42.403&lon=173.685&zoom=11&layers=0B00FTF 


At z12 Kaikoura is where I expect it, if you zoom out one lvl to z11 you
can see the big offset. If you zoom out to z10 the offset stays about
the same.

Why is there such a big jump in offset from z12 to z11?

This is the screen shot I previously mentioned that I took around the
15th August when I could see two captions.
http://www.flickr.com/photos/29556472@N03/2763631947/
I was generating caption layer for z6-11 for New Zealand around the 15th
Aug and it seemed to me that everything went from not being offset to
being a few miles south at that point.
That's what made me wonder if it was a client problem in or/p that was
introduced about the time the proximity filter was added  which was the
6th Aug.




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