[ka-Map-users] Can someone answer this question please or tellmewho I should ask it to?

[Paul Spencer]

You can add GROUPs to your layers.  Layers with the same GROUP name  
will be combined into a single tile draw.  Layers without a GROUP are  
automatically placed in a special GROUP called Base.  Each GROUP is  
drawn as a separate set of tiles with a separate cache.

Is that what you are looking for?

Cheers

Paul

On 31-Jul-06, at 5:28 PM, Samuel Doyle wrote:

> Is there a way to make it so that I can specify only a single layer  
> for my tiles to be drawn on?
>
> Thanks, S.D.
>
> Paul Spencer <pspencer at dmsolutions.ca> wrote: That's probably about  
> right ... the map would be redrawn only at the
> refresh interval but the layers would be redrawn at the redraw
> interval. You would typically get two redraws before the data would
> change.
>
> Cheers
>
> Paul
>
> On 31-Jul-06, at 4:24 PM, Samuel Doyle wrote:
>
> > Hi I gave it another try and let it run for awhile and it appears
> > to eventually work.
> > I mean, I have set the redraw_interval to be 30 seconds and the
> > refresh_interval to be 60 seconds. It takes usually three refreshes
> > before the changes appear on the map.
> >
> > S.D.
> >
> > "Delfos, Jacob" wrote:
> > Samuel,
> >
> > I didn't mean for you to make the "force_redraw" a permanent
> > configuration, but just to test whether your site has a problem
> > with overwiting tiles. Since it doesn't, it must mean there's
> > something wrong with the reading/comparing of the timestamp.
> >
> > I have just done some testing with the most recent CVS code, and on
> > my side the redraw mechanism works fine; I used these settings in
> > my metadata:
> >
> > redraw_interval "60"
> > tile_source "redraw"
> >
> > After 1 minute, it would redraw, within one minute of the last
> > redraw it would return the cached tiles.
> >
> > Please bear in mind that these metadata values MUST be entered into
> > the FIRST layer of the group. Only metadata from the first layer is
> > used.
> >
> > If you still run into issues, please enter this on line 171 of
> > tile.php, after " fclose($h) " :
> > trigger_error("now: ".$now."; timestamp: ".$timestamp."; interval:".
> > $interval."; meta_timestamp: ".$meta_timestamp,E_USER_WARNING);
> >
> > Let us know what it says. Also, give an example URL of one of your
> > tiles. In Firefox, use "page -> info", and look under the media tab.
> >
> > regards,
> >
> > Jacob
> >
> >
> >
> >
> >
> >
> > From: ka-map-users-bounces at lists.maptools.org [mailto:ka-map-users-
> > bounces at lists.maptools.org] On Behalf Of Samuel Doyle
> > Sent: 29 July 2006 08:01
> > To: Delfos, Jacob
> > Cc: ka-map-users at lists.maptools.org
> > Subject: RE: [ka-Map-users] Can someone answer this question please
> > or tellmewho I should ask it to?
> >
> > Hi,
> > I played with the force option in tile.php which appeared to be
> > very resource intensive. I extended upon this by adding another
> > 'force_redraw' field in the metadata section for each layer of
> > interest in the map file. This resulted in the desired effect
> > however, it is still very resource intensive even if I'm requesting
> > just one layer. For every request my server ends up thrashing like
> > mad. Does anyone have any insight they could provide?
> >
> > Thanks, S.D.
> >
> > "Delfos, Jacob" wrote:
> > Samuel,
> >
> > Have you checked whether the URL is actually different? Are you
> > saying it serves out the same tiles, despite the different
> > timestamp? Did you check whether any tiles actually get re-written?
> > Have you tried playing with the "force" parameter of tile.php? If
> > this creates a new tile, it means the problem is it decides it
> > doesn't need to be re-created. If "force" doesn't work, it means it
> > isn't able to re-create the tiles.
> > Is there a timestamp directory present?
> >
> > regards,
> >
> > Jacob
> >
> >
> >
> > From: Samuel Doyle [mailto:sdoyle_2 at yahoo.com]
> > Sent: 28 July 2006 09:31
> > To: Delfos, Jacob
> > Subject: RE: [ka-Map-users] Can someone answer this question please
> > or tell mewho I should ask it to?
> >
> > Thanks for the repsonse.
> >
> > Yes I have included the redraw_interval and have tried the various
> > combinations even setting tile_source to nocache setting the
> > redraw_interval to be both greater then and less then the
> > refresh_inteval even though it looks as if it should be less then
> > what you set for the refresh_interval. In the end In the end I
> > always end up needing to delete the tiles directory populated by
> > mapserver in order to get them regenerated again.
> >
> > "Delfos, Jacob" wrote:
> > Samuel,
> >
> > Have you looked at the redraw_interval, described in init.php? That
> > appends a timestamp to the URL of the tile, to force redrawing of
> > the tiles. refresh-interval only does a re-request, returning a
> > cached tile.
> >
> > regards,
> >
> > Jacob
> >
> >
> > From: ka-map-users-bounces at lists.maptools.org [mailto:ka-map-users-
> > bounces at lists.maptools.org] On Behalf Of Samuel Doyle
> > Sent: 28 July 2006 07:33
> > To: ka-map-users at lists.maptools.org
> > Subject: [ka-Map-users] Can someone answer this question please or
> > tell mewho I should ask it to?
> >
> > Sorry but I haven't received any answers for the questions I have
> > posted here but this one is a bit important.
> >
> > After poking around and guessing at based on what I noticed in the
> > KaMap code I have place a refresh_interval value in a metadata
> > section within a layer in my map file. Now, I can see a periodic
> > update on the map but the problem is when I have modifed a dbf file
> > under mapserver those changes are not reflected. So the question
> > is, is there something I need to do special to get
> > MapServer or KaMap or whatever to detect an update done to a map so
> > that it is served properly?? These changes to the map files are
> > being done programatically and not by hand.
> >
> > Thanks, S.D.
> >
> >
> >
> > _______________________________________________
> > ka-Map-users mailing list
> > ka-Map-users at lists.maptools.org
> > http://lists.maptools.org/mailman/listinfo/ka-map-users
>
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> |Paul Spencer pspencer at dmsolutions.ca |
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> |Applications & Software Development |
> |DM Solutions Group Inc http://www.dmsolutions.ca/|
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>
>
>
>

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|Paul Spencer                           pspencer at dmsolutions.ca   |
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|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
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