Thank you. Re: [Paparazzi-devel] Google Maps are not downloading

[David Conger]

Pascal,

Thank you! It works

I just used GCS and the tiles load as if nothing changed.

I went to the paparazzi3 directory, svn update, then make clean; make.

-David Conger

On Sep 25, 2009, at 12:56 PM, Pascal Brisset wrote:

> Hi,
>
> it seems that the Google naming policy for tiles  has changed. I did  
> not find any documentation about it.
> Looking at the requests from the standard Google Maps application,  
> it is possible to forge the new names.
> Previously, the tiles were named according to quadtree coding using  
> q (north-west), r (north-east), s (south-east) and t (south-west) to  
> name a recursive split of the earth.
> Now the tiles are simply accessible giving a zoom level (z) and two  
> coordinates, x (east) and y (south) from 0
> to 2^z-1 .
>
> I've just commited a patch (sw/lib/ocaml/gm.ml).
> Since our caches (var/maps/) are full of maps named with the  
> previous policy, I kept this naming. So, just a small translator for  
> the URL has been added:
>
> let google_maps_url = fun s ->
> sprintf "http://khm.google.com/kh?n=404&v=3&t=%s"; s
>
> has been modified into
>
> let google_maps_url = fun s ->
> let (x, y, z) = xyz_of_qsrt s in
> sprintf "http://khm0.google.com/kh/v=45&x=%d&s=&y=%d&z=%d"; x y z
>
> where xyz_of_qsrt translates "trtqtqsqqqqsrqrqrt" into (67690,  
> 43073, 17)
>
> so "svn update sw/lib/ocaml/gm.ml; make" should solve your problems
>
> --Pascal
>
> PS: Yes, we will use openstreetmap. Soon :-)
>
>
>
> Matthew Currie wrote:
> > Yes, 404 is not a good sign.  The google server is actively and  
> > politely
> > responding and saying the tile you requested is not available.  We  
> > can
> > hope this is a temporary server change.
> >
> > I was going to do my first flight this weekend and I don't have the
> > tiles for my new flying site yet =/
> >
> > Matthew Currie
> >
> > Austin Jensen wrote:
> >
> > > Anyone else having troubles downloading new tiles from Google. I get
> > > this error
> > >
> > > --2009-09-25 11:40:53-- http://khm.google.com/kh?n=404&v=3&t=tqtrstttqss
> > > <http://khm.google.com/kh?n=404&v=3&t=tqtrstttqss>
> > > Resolving khm.google.com... 74.125.155.190, 74.125.155.136,
> > > 74.125.155.93, ...
> > > Connecting to khm.google.com
> > > <http://khm.google.com>|74.125.155.190|:80... connected.
> > > HTTP request sent, awaiting response... 404 Not Found
> > > 2009-09-25 11:40:53 ERROR 404: Not Found.
> > >
> > > This is different than the error you get when the server bans you  
> > > right?
> > > I've tried different computers from different locations and had  
> > > the same
> > > problem.
> > >
> > > Thanks,
> > > Austin
> > >
> > > ------------------------------------------------------------------
> > > Austin Jensen, Research Engineer
> > > Utah Water Research Laboratory (UWRL)
> > > Utah State University, 8200 Old Main Hill
> > > Logan, UT, 84322-8200, USA
> > > E: address@hidden <mailto:address@hidden 
> > > >
> > > T: (435)797-3315
> > >
> > >
> > > ------------------------------------------------------------------------
> > >
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