[OSM-talk] Any way to reduce editor applet on-screen resolution?

Sun Feb 11 00:47:36 GMT 2007

Hi Nick,

I was trying to run the applet by just running a modified
file:///tmp/edit.html; pretty crude, but it seemed the easiest way to 
start. I found subsequently that running at a higher zoom level let me 
download a whole screen's worth of tiles, but I then still hadthe problem 
that I have to scroll around an awful lot (although I no longer had to 
flip between edit and view - which saved me a bit of time). I confirmed 
with another user off-list that this worked for him under XP with Firefox.

I didn't think of running from svn, mea culpa. I just ran it and it came 
up fine. I tweaked the runapplet to bring up a Halifax location as follows 
(for reference for anyone else who has the same problem):

exec $JAVA $JAVAOPTS \
     -cp $OSMCLASSPATH \
     processing.core.PApplet \
     org.openstreetmap.processing.OsmApplet \
     --user="$user" --pass="$pass" --clat="44.6632451999706" --clon="-63.5839118315807" $@

This worked fine initially but after panning around for a bit it stopped 
downloading tiles. It seems like if one tile fails to download, the applet 
completely fails to download any more tiles. To experiment with where the 
problem was, I setup a transparent Squid cache and disabled the default 
nocache acl. Surprisingly enough this didn't speed it up as much as I 
thought, it looks like most of the time is spent rendering the tiles. 
Here's the tail end of the squid log as it failed halfway through 
rendering a screen:

1171154279.392    678 10.2.1.142 TCP_HIT/200 8882 GET http://us.maps3.yimg.com/aerial.maps.yimg.com/tile? - NONE/- image/jpeg
1171154281.197    137 10.2.1.142 TCP_HIT/200 23924 GET http://us.maps3.yimg.com/aerial.maps.yimg.com/tile? -NONE/- image/jpeg
1171154283.588     35 10.2.1.142 TCP_HIT/200 30293 GET http://us.maps3.yimg.com/aerial.maps.yimg.com/tile? -NONE/- image/jpeg
1171154310.486    558 10.2.1.142 TCP_MISS/200 660 GET http://us.maps3.yimg.com/aerial.maps.yimg.com/copyright? - DIRECT/194.25.26.95 text/xml
1171154310.767    263 10.2.1.142 TCP_MISS/401 755 GET http://www.openstreetmap.org/api/0.3/map? - DIRECT/128.40.58.202 text/html
1171154311.200    417 10.2.1.142 TCP_MISS/200 4774 GET http://www.openstreetmap.org/api/0.3/map? - DIRECT/128.40.58.202 text/html

Any suggestions on anything I could tweak to increase timeouts, or any 
other settings? Right now I'm running it on a laptop at home, a PIII-750, 
but my laptop at work is a P4M-1800, so I don't think it's necessarily a 
cpu issue.

Cheers, Steve

On Sat, 10 Feb 2007, Nick Black wrote:

> Hello Steven,
>
> How did you try running the applet?  I am running Xubuntu Edgy with
> the standard java libraries and the applet runs fine.  Did you try the
> runapplet.sh script?  Check out the openstreetmap svn tree, go to
> blah/java/ and execute:
>
> $ sh runapplet.sh <you email> <your pass>
>
> and it should run.  If not, post the error messages here.  It sounds
> like you only ran the osm-applet.jar file - it depends on several
> other libraries that are not compiled  in to the same jar, which could
> explain the error.
>
> Nick
>
>
> On 2/9/07, Steve Bromwich <osm at fop.ns.ca> wrote:
>> Hi,
>> 
>> I seem to have a problem with the Yahoo imagery timing out as it downloads
>> in the on-line editing applet. It starts downloading quickly, does three
>> columns of Yahoo imagery, then slows down for the next few tiles, and
>> usually stops after 6 tiles. I don't know if there's a timeout in the code
>> that's set too low or what. However... The resolution of the applet
>> (900x700) is such that most of the display is off the screen. I think if I
>> could reduce the applet size to something smaller, say 800x400, I'd be
>> able to do more.
>> 
>> As it is, I have to keep clicking between the view and edit tabs and drag
>> the slippy map a few pixels over, then hope that I can get enough imagery
>> downloaded to map out another hundred metres or so of coastline. This is,
>> to say the least, somewhat tedious. I tried running the applet locally on
>> my machine (by saving edit.html to /tmp and wgetting the jars) to see if I
>> could see anything obviously awry but for some reason it didn't want to
>> run - the Java console complained about AWT, which I don't know anything
>> about. If someone could give me some suggestions on the best direction to
>> go I'd be most grateful.
>> 
>> I'm running this on a Linux laptop with Firefox 2.0.0.1 and Sun's Java 5
>> package.
>> 
>> Cheers, Steve
>> 
>> _______________________________________________
>> talk mailing list
>> talk at openstreetmap.org
>> http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
>> 
>
>
> -- 
> Nick Black
> --------------------------------
> http://www.blacksworld.net
>