[mapserver-users] Mapcache question.

Mon Dec 5 08:25:06 EST 2011

Ahh, ok that explains it.
Thanks for the information.

Jerl

On Mon, Dec 5, 2011 at 1:05 AM, thomas bonfort <thomas.bonfort at gmail.com>wrote:

> only the wms and wmts services support dimensions (there is no spec
> defining this support for the others).
>
> you can either adapt your gmaps/js code to build a wmts url, or hack
> into the mapcache code to add dimension support to the tms / gmaps
> service.
>
> --
> thomas
>
> On Sun, Dec 4, 2011 at 22:23, forums <forums at craniumjuice.com> wrote:
> > 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.
>

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