[talk-au] Osmarender

Brent Easton b.easton at exemail.com.au
Tue Sep 25 03:58:25 BST 2007 

lowzoom doesn't do an upload, it just copies the generated tiles into your tilesathome tmp directory, so after it finishes running, go back to your tilesaathome dir and run perl tilesgen.pl upload.

This version of lowzoom works basically by downloading every level 12 tile in the (4096 of them), then stiching them together and reducing them using image magick.

The new experimental lowzoom is supposed to work on levels 8-11 using stylesheets on actual data downloaded from the db using osmxapi. The idea being to generate proper sized maps, rather thanthe miniature versions that the current lowzoom produces. I haven't been able to get this to work yet though.

I am working on rendering the Western border of NSW at the moment, plus the highway from Adelaide to Melbourne.

Cheers,
Brent.

*********** REPLY SEPARATOR  ***********

On 25/09/2007 at 12:45 PM Lachlan Rogers  wrote:

>I'm running Linux, and have ImageMagick installed.  I have perl v5.8.8
>built for i686-linux.
>
>The ctrl-click trick is very helpful for finding the tile numbers at
>low zoom levels.  I'll try doing a low zoom render, and see how it
>goes.
>
>Thanks,
>Lachlan
>
>
>On 9/25/07, Brent Easton <b.easton at exemail.com.au> wrote:
>> Lachlan,
>>
>> >Port Phillip Bay looks great!  Last week I had a play with the
>> >oceantiles file and tried to render water in the middle of the bay,
>> >but it didn't work.  I'm not exactly sure why.  I was only editing my
>> >local copy of the oceantiles file, as I don't have svn write access.
>> >Could this be my problem?
>>
>> The local editing should be ok as long as you run the png2tileinfo.pl
>script and copy the new oceantiles.dat file up to into the tilesathome
>directory.
>>
>> I had problems with the water also. In the end I cheated. There where a
>handful of tiles that would not generate water no matter what I tried, so
>I rendered them, then copied the emptysea.png tile over the top of the
>level 12 tile they generated, then uploaded them. This fixed them and they
>should not be rerendered again soon.
>>
>> >I've been doing quite a lot of zoom12 renders in the Canberra region,
>> >keeping it pretty much up to date.  I have tried to work out how to do
>> >lowzoom renders myself, but have not been able to sort it out.  Could
>> >you offer me a few tips?
>>
>> Zoom to level 6 on informationfreeway and ctrl click on where you want
>to render, this will tell you the level 6 tile co-ordinates. e.g. Canberra
>and Sydney are in the 58 38 tile.
>>
>> Change down to the tools/lowzoom directory and run
>>
>> perl lowzoom.pl 58 38 6 12
>>
>> And it 'should' just run. The lowzoom script needs image-magick
>installed. Are you on Windows or Linux? What version of Perl are you using?
>>
>> Brent.
>>
>>
>>
>> >- Lachlan
>> >
>> >
>> >On 9/25/07, Brent Easton <b.easton at exemail.com.au> wrote:
>> >> Hi Lachlan,
>> >>
>> >> Funny thing, it was the sad sight of Port Phillip Bay that got me
>> >started on this. I have extended your coastline Eastwards to around
>> >Phillip island and have fixed up the oceantiles database and re-rendered
>> >the water section. Also did the Snowy river, upper murray and the
>> >gippsland coastline. I ran a lowzoom for the Melbourne and Gippsland
>tiles
>> >yesterday, so have a look now.
>> >>
>> >> I have also fixed up the Vic/SA border to where it should be and got
>it
>> >rendered, plus a little of the Murray up on the corner - am just doing
>> >another lowzoom on that now. Osmarender currently does not render
>segments
>> >that pass through, but do not have a node inside a level 12 tile, so
>> >border lines need a node every few kilometres for Osmarender to 'see'
>them.
>> >>
>> >> I am using the 'old-style' lowzoom script and doing it myself. I could
>> >not get the new-style lowzoom to work.
>> >>
>> >> Regards,
>> >> Brent.
>> >>
>> >>
>> >> *********** REPLY SEPARATOR  ***********
>> >>
>> >> On 25/09/2007 at 10:23 AM Lachlan Rogers  wrote:
>> >>
>> >> >How do we request low zoom renders (or do them ourselves)?  Even
>> >> >though I'm in Canberra, I've added coastline around Port Phillip Bay
>> >> >in Melbourne over the last few weeks and it would be nice if this
>> >> >appeared in the low zoom tiles.
>> >> >
>> >> >- Lachlan
>> >> >
>> >> >
>> >> >On 9/25/07, Brent Easton <b.easton at exemail.com.au> wrote:
>> >> >> Hi Guys,
>> >> >>
>> >> >> Don't forget to request updates on www.informationfreeway.org to
>> >update
>> >> >the Osmarender layer with your work. I've been doing a bit of work on
>> >> >borders and coastlines and finding all this great stuff that has not
>> >been
>> >> >rendered yet. I have been madly rendering whatever I can find. Unless
>> >you
>> >> >request the updates, or process them yourself, it just doesn't seem
>to
>> >> >happen with Osmarender.
>> >> >>
>> >> >> Cheers,
>> >> >> Brent.
>> >> >> ____________________________________________________________
>> >> >> Brent Easton
>> >> >> Analyst/Programmer
>> >> >> University of Western Sydney
>> >> >> Email: b.easton at uws.edu.au
>> >> >>
>> >> >>
>> >> >> _______________________________________________
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>> >> >
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>> >>
>> >>
>> >> ____________________________________________________________
>> >> Brent Easton
>> >> Analyst/Programmer
>> >> University of Western Sydney
>> >> Email: b.easton at uws.edu.au
>> >>
>> >>
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>>
>> ____________________________________________________________
>> Brent Easton
>> Analyst/Programmer
>> University of Western Sydney
>> Email: b.easton at uws.edu.au
>>
>>
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>
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____________________________________________________________
Brent Easton                       
Analyst/Programmer                               
University of Western Sydney                                   
Email: b.easton at uws.edu.au

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