[Talk-us] JOSM zoom limits per server solved (fixes Tiger grey overlay )

Alan Millar grunthos503 at yahoo.com
Sun Sep 23 19:18:42 BST 2012


I also found there is a minimum zoom also. Put it in the url as min,max like

tms[16,19]:http://...

Fixes the grey tiles when I zoom back out. 

- Alan


On Sep 23, 2012, at 12:54 AM, Toby Murray <toby.murray at gmail.com> wrote:

> I knew about the max zoom setting but for some reason never thought about applying it to the TIGER tiles to fix the grey....
> 
> Toby
> 
> On Sep 21, 2012 1:23 PM, "Alan Millar" <grunthos503 at yahoo.com> wrote:
> Maybe everyone else knows this, but I just discovered it myself so I
> thought I would share it.
> 
> I've been using Remap-a-tron to fix up US roads.  I use both the Bing
> imagery and the TIGER 2012 tiles overlaid, and it makes it really
> useful.
> 
> However, I've been frustrated that I can pretty far in with the Bing
> images, but if I go too far, the Tiger (normally transparent) tiles turn
> grey and obscure the Bing images.  I've been continually turning off and
> back on the Tiger layer, which is a bit annoying after a while.
> 
> JOSM has an easy limit in the Preferences for the maximum zoom, but it
> affects everything.  I set it to 19, and then I did not get the grey
> boxes from Tiger, but did not get the higher detailed photos from Bing
> either.
> 
> As it turns out, JOSM does have a max-zoom per tile server feature; it
> just is not obvious or clearly documented that I could find.
> 
> You can enter it as part of the TMS url like this:
> 
> tms[19]:http://{switch:a,b,c}.tile.openstreetmap.us/tiger2012_roads/{zoom}/{x}/{y}.png
> 
> The number 19, right up front, says that the maximum zoom to use for
> this layer is 19.  This solved the whole thing for me.
> 
> I also found that if you go into Josm preferences in expert mode, and
> dig and dig and dig into the imagery providers entries, this is labeled
> as max-zoom.  Too bad it isn't easier to find.
> 
> Anyways, hope this helps others too.
> 
> - Alan
> 
> 
> 
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