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

[Paul Spencer]

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" <Jacob.Delfos at maunsell.com> 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" <Jacob.Delfos at maunsell.com> 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" <Jacob.Delfos at maunsell.com> 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                              |
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