[OSM-talk] tiles at home 404 handler, and assumed seas

[Frederik Ramm]

Hi,

(quoting myself quoting myself)

> Scotland being under water in this example means that the following  
> idea:
>
>> If I provide you with a list of all level-12 tiles on the earth's
>> surface that are "land" but not covered by a real tile, would you use
>> that to seed your database?
>
> really should be done. It may be true that most of the world is water,
> but still there are about 3.2 million land level-12 tiles and we only
> have data for less than 100k of them, so defaulting to water makes us
> wrong for 3.1 million level-12 tiles ;-) Of course we were even more
> wrong before when we had no water at all, but it was not as obvious!

Sadly I haven't heard back on this issue.

Would someone with a more direct contact to OJW ask him to check his  
spam filter, sometimes I feel that everything I mail him is just  
ignored... it is of course perfectly ok for people to work on other  
things but if they are, access-permission-wise, in a place where  
certain things simply don't work without them, then one would at  
least hope to receive word of when they will be availble to deal with  
a situation...

Meanwhile level-7 tiles were created that showed half of Europe under  
water, which I found somewhat less than ideal. With no information on  
whether the problem was known to OJW or whether he would want my help  
in fixing it, and without write access to the relevant database, I  
resorted to creating a list of those level-12 tiles that are "known  
land" from Martijn's data, removing all existing tiles from the list,  
and then uploading a 67-byte level-12 tile for the remaining tile  
areas. I did all this for Europe only, resulting in the upload of  
250k tiles (don't worry, they are not stored on the server, each tile  
upload is effectively only an INSERT to the empty-tile database with  
1000% overhead).

At least Europe should look halfway right again now.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00.09' E008°23.33'