[mapserver-users] Mapcache question.

[forums]

I almost have it, I just can't seem to get the targetdate dimension to
populate.

/mapcache/gmaps/country at WGS84/1/1/0.png works fine if I don't have the
layers that require the targetdate parameter.  I get a "parameter pattern
failed validation" error returned from Mapserver when I have the necessary
layers defined in the mapcache config file.

The obvious thing for me to try was:
/mapcache/gmaps/country at WGS84/1/1/0.png?targetdate=201112042105

But that failed.  Is there a way to get the targetdate to fill in? I've
moved it around a bit, but still can't get it to fill in.

Thanks again!!

Jerl


On Sun, Dec 4, 2011 at 2:59 PM, forums <forums at craniumjuice.com> wrote:

> Thanks Stephen and Thomas.
>
> I think I'll be good with the dimension and the disk cache.
>  Unfortunately, the apache we have doesn't have memcache built into it (too
> much hassle to upgrade it right now) and the version of SQLite is too
> old...also a hassle to upgrade.
>
> I was able to get it to load the proper map when just using the entire
> bounding box, the whole world.  Now to make it work with the the tilemode
> for google...which looks like that should be straight forward??
>
>
> Thanks guys!!
>
> Jerl
>
>
> On Sun, Dec 4, 2011 at 2:00 PM, thomas bonfort <thomas.bonfort at gmail.com>wrote:
>
>> Jerl,
>> mapcache itself does not do any pruning of the caches it has created,
>> but you can get the same effect by using a cache backend that supports
>> expiration (i.e. memcache).
>> Mapcache can fit your need, provided:
>> - you configure your tileset with a "targetdate" <dimension>- you use
>> a memcache backend to store the created tiles, and set an <expires>
>> value in mapcache to 5 hours
>> If the memory requirement for storing 5 hours worth of tiles is too
>> important for a memcache server instance, you can have a look at
>> membase which will also store less frequently used data to disk. The
>> membase protocol is compatible with memcache, so you can use either
>> memcache or membase with the same mapcache configuration.
>>
>> Of course, by running a script every hour to delete expired tiles as
>> you are doing now, you can then use the classic disk based cache
>> backend.
>> regards,
>> thomas
>> On Sun, Dec 4, 2011 at 20:13, forums <forums at craniumjuice.com> wrote:
>> > Hi:
>> >
>> > I hope this is the proper place to ask questions about Mapcache since
>> it's
>> > been moved into the trunk of Mapserver.
>> >
>> > I'm wondering if Mapcache can help with a particular setup, and if so
>> maybe
>> > some advice or direction on where to start?
>> >
>> > Here's the setup.  Every 5 minutes a new set of GeoTiffs are created in
>> a
>> > new directory.  I create a tileindex for the GeoTiffs and use those in
>> the
>> > map layer.  Every hour, anything more than 5hours old gets deleted.
>> > I have a single mapfile setup.
>> >
>> > The general layer is setup like:
>> >
>> >     LAYER
>> >         NAME 'IMG1'
>> >         METADATA
>> >             'wms_title'           'IMG 1'
>> >             'wms_srs'             'EPSG:4326'
>> >             'wms_extent'          'MINX MINY MAXX MAXY'
>> >             'default_targetdate' ''
>> >             'targetdate_validation_pattern' '^[0-9]{12}$'
>> >         END
>> >         STATUS ON
>> >         TILEINDEX '/PATH/TO/IMG/DIR/%targetdate%/TILEINDEX.shp'
>> >         TILEITEM 'Location'
>> >         TYPE RASTER
>> >     END
>> >
>> >
>> > I'm currently loading these images as overlays for Googlemaps. using the
>> > mode=tile&tilemode=gmaps...&targetdate=2011...etc.
>> > Problem is it's too slow. I end up loading hundreds of images, as I
>> > basically create an animation using sequential times.
>> >
>> > I'd like to be able to have a single mapcache config file, that will
>> pass
>> > the date through to pull the proper shapefile, and have the result
>> cached so
>> > next time it's loading off the disk.  MOST of the images end up being
>> > blank/transparent tiles.
>> >
>> > Is Mapcache a good choice for this?
>> > The front end for this is just a simple GoogleMaps viewport, but ends up
>> > loading multiple timeslots for display.  It generates the request URL
>> (not
>> > currently in WMS fashion but could be).
>> >
>> > Thanks for any help I can get.
>> >
>> > Jerl
>> >
>> >
>> >
>> > _______________________________________________
>> > mapserver-users mailing list
>> > mapserver-users at lists.osgeo.org
>> > http://lists.osgeo.org/mailman/listinfo/mapserver-users
>> >
>>
>
>
>
> --
> A computer without Windows is like chocolate cake without mustard.
>



-- 
A computer without Windows is like chocolate cake without mustard.
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