[mapserver-users] mapcache

[John Callahan]

Oops!  Correction:   My map services typically look like:  (forgot the
cgi-bin path)

http://servername/fcgi-bin/myservice?LAYERS=layer1,layer2,...&REQUEST=GetMap&SERVICE=WMS&..
..

- John




On Tue, Feb 7, 2012 at 4:41 PM, John Callahan <john.callahan at udel.edu>wrote:

> Thanks for the help but I think I'm misunderstanding mapcache at a more
> basic level.
>
> What is the mapcachealias?  In the apache httpd.conf file (using the
> latest MS4W), there is
>
> MapCacheAlias /mapcache "C:/ms4w/apps/mapcache/mapcache.xml"
>
> How does that relate to my own mapservices?   What changes do I need to
> make to have them cached?  My mapservices typically look like
>
>
> http://servername/myservice?LAYERS=layer1,layer2,...&REQUEST=GetMap&SERVICE=WMS&..
> ..
>
>
> Something else that seems strange is when looking at the demo (
> http://servername/mapcache/dem/wms), it makes available additional layers
> based on entries in the current mapcache.xml file.  When I try to select my
> own service through the demo interface, I see that it makes a GetMap
> request with LAYERS = tileset name.  Does the name I define for the tileset
> in mapcache.xml have to be specific to my map service?  or any special
> requirements?
>
> Thanks for your help.
>
> - John
>
>
>
>
>
> On Wed, Feb 1, 2012 at 6:56 AM, thomas bonfort <thomas.bonfort at gmail.com>wrote:
>
>> On Thu, Jan 26, 2012 at 19:30, John Callahan <john.callahan at udel.edu>
>> wrote:
>> > I'm giving mapcache a try but with no luck.  Well, some luck.  The
>> module
>> > loads fine and the demo (vmap0, http://127.0.0.1/mapcache/demo/wms)
>> also
>> > works fine.  I see the tiles being generated on disk.  Great.  However,
>> the
>> > problem comes in with my own data/services.  A few questions may help me
>> > determine the problem.
>> >
>> > - in the source element, how do you define multiple layers?  Comma
>> separated
>> > or separate <layers> entries?
>>
>> <layers>layer1,layer2</layers>
>>
>> >
>> > - in the tileset element, can you have multiple grid entries?  It
>> doesn't
>> > seem like it from reading the documentation but the sample tileset shows
>> > both the "g" and "WGS84" grids.
>> which doc part does not show this?
>> http://www.mapserver.org/trunk/mapcache/config.html#tileset
>>
>> >
>> > - for cache type attributes, what are the possible values?  The docs
>> show
>> > several possibilities (disk, sqllite, memcache) but the sample shows
>> > type="tiff" which is not listed on the doc page.  Can other file
>> extensions
>> > be used here?
>> http://www.mapserver.org/trunk/mapcache/caches.html
>>
>> >
>> > - when I define a FORMAT with name and type, how does that get used?  I
>> see
>> > that is called in the tileset but how does that relate to the image type
>> > under getmap/params/format?
>>
>> The format is used when recompressing individual tiles after having
>> cut a larger metatile. It is also used when combining multiple tiles
>> into a single image for a getmap request. If you want to force a
>> specific format to be sent to the source wms server when creating a
>> tile, you can add a <format>foobar</format> to your source definition
>> (at the same level as the <layers> parameter). Both formats don't have
>> to be equivalent, it is actually a good idea to request the images in
>> png from the source wms server even when using a jpeg format for the
>> the tileset, as this will avoid a double jpeg compression (once on the
>> wms server, once on the mapcache server) when storing an individual
>> tile to the caches.
>>
>> regards,
>> thomas
>>
>> >
>> >
>> > The doc page I am referring to is
>> > at http://www.mapserver.org/trunk/mapcache/config.html.  I'm sure I'll
>> have
>> > other questions as I work my way through.  Thanks for this awesome
>> addition
>> > to Mapserver!
>> >
>> > - John
>> >
>> > ***********************************************
>> > John Callahan, Research Scientist
>> > Delaware Geological Survey, University of Delaware
>> > URL: http://www.dgs.udel.edu
>> > *************************************************
>> >
>> >
>> > _______________________________________________
>> > mapserver-users mailing list
>> > mapserver-users at lists.osgeo.org
>> > http://lists.osgeo.org/mailman/listinfo/mapserver-users
>> >
>>
>
>
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