[mapserver-users] Precache

Sun Jun 21 07:59:08 PDT 2009

I'll be there too !

Best regards,

Guillaume

Varun saraf a écrit :
> It worked perfect.I have another question but I guess I will put it up
> on the tilecache-users list.
> 
> Thanks a lot,
> Varun
> 
> On Fri, Jun 19, 2009 at 6:55 PM, Guillaume
> Sueur<no-reply at neogeo-online.net> wrote:
>> Hi Varun,
>>
>> It looks rather like a question for the tilecache-users list, but I can give
>> you a hand.
>> I think you didn't specify any layer when running tilecache_seed.py
>> Please try :
>> tilecache_seed.py [your_layer_name_as_set_in_tilecache.cfg] 0 5
>> where 0 and 5 are zoom start and zoom end. You can adapt this last one
>> depending on how many levels you set for your layer.
>> Run it from the directory where tilecache.cfg is, to avoid problem if you
>> have many of them...
>>
>> Regards,
>>
>> Guillaume
>>
>> Varun saraf a écrit :
>>> Hello,
>>>
>>> I have got this (tilecache with mapserver on google maps) working
>>> finally after a lot of problems but I now really need to know about
>>> how to do a pre-cache of all the tiles from mapserver. I am running
>>> tilecache 2.10 on Windows with mapserver ms4w from maptools.org. I
>>> tried running "tilecache_seed.py" as per the suggestion above but it
>>> always ends up in the following error
>>>
>>> Traceback (most recent call last):
>>>  File "C:\ms4w\Apache\cgi-bin\tilecache-2.10\tilecache_seed.py", line 9,
>>> in <mo
>>> dule>
>>>    TileCache.Client.main()
>>>  File "C:\ms4w\Apache\cgi-bin\tilecache-2.10\TileCache\Client.py", line
>>> 153, in
>>>  main
>>>    layer = svc.layers[args[0]]
>>> IndexError: list index out of range
>>>
>>> Any help in this regard would be great.
>>>
>>> Thanks,
>>> Varun
>>>
>>> On Fri, Jun 19, 2009 at 2:39 PM, Varun saraf<vsaraf.gmu at gmail.com> wrote:
>>>> Hi Roger,
>>>>
>>>> I am trying to get my mapserver and tilecache work together but its
>>>> somehow not working. I am using the same projection as you in all my
>>>> layers and the mapfile. (This works when I call my mapserver directly
>>>> from google and hence the projection is right).
>>>>
>>>> Here is my mapfile (Only things that might be important).
>>>>
>>>> MAP
>>>>   EXTENT -173 5 -45 75
>>>>
>>>>   IMAGETYPE PNG
>>>>
>>>>   PROJECTION
>>>>     "init=epsg:4326"
>>>>   END
>>>>
>>>>   WEB
>>>>   METADATA
>>>>    wms_srs             "EPSG:4326 EPSG:900913"
>>>>   END
>>>> ....
>>>>   END
>>>>
>>>>   LAYER
>>>> ....
>>>>       PROJECTION
>>>>           "init=epsg:4326"
>>>>       END
>>>>   END
>>>>
>>>> Next I added the 900913 epsg to the proj.4 of mapserver and made the
>>>> required changes in tilecache.cfg file as you specified.
>>>>
>>>> [google-tiles]
>>>> type=MapServerLayer
>>>> mapfile=C:/ms4w/apps/QCTGIS/drawMap.map
>>>> metaTile=true
>>>> metaSize=2,2
>>>> metaBuffer=0,500
>>>> layers=tr20_d00
>>>> spherical_mercator=true
>>>> srs=EPSG:900913
>>>>
>>>> I am not sure if the linkn I am using is wrong. I have tilecache
>>>> installed in the cgi directory of the apache server that was installed
>>>> using "ms4". The example index.html that comes with tilecache works
>>>> fine and I can see the images being cached. Also my mapserver directly
>>>> works fine. Can you tell me what is it that I am doing wrong here? the
>>>> link I use for the tileUrlTemplate in google maps is
>>>>
>>>> "http://127.0.0.1:8123/cgi-bin/tilecache-2.10/tilecache.cgi/1.0.0/google-tiles/{Y}/{X}/{Z}.png?type=google".
>>>> I can also see that this call gets initiated in the apache logs
>>>> (access.log) but nothing happens therafter. I don't even know if this
>>>> is failing at tilecache end and mapserver isn't being called at all or
>>>> at mapserver's end where the image is not being sent by mapserver. Can
>>>> you help me out here?
>>>>
>>>> Thanks a lot.
>>>> Varun
>>>>
>>>> On Thu, May 21, 2009 at 12:46 PM, Roger André<randre at gmail.com> wrote:
>>>>> Ahh, ok.  I'm not sure in what fashion you are using TileCache, but my
>>>>> experience has been with using it to create tiles to display in Google
>>>>> Maps.  Google Maps uses the projection which is EPSG:900913.  I
>>>>> believe there are other codes for it, but that is the one I use.
>>>>>
>>>>> All of my source data for the MapServer projects I make are in
>>>>> EPSG:4326.  So there are 3 things I need to do in order to make the
>>>>> Tilecache output tiles align correctly in Gmaps.
>>>>>
>>>>> 1. I set both the mapfile and the layer projections to EPSG:4326.
>>>>> MAP
>>>>>  NAME  'v2_80m_global'
>>>>>  PROJECTION
>>>>>   "init=epsg:4326"
>>>>>  END
>>>>>
>>>>>  LAYER
>>>>>   NAME 'imagery'
>>>>>   PROJECTION
>>>>>     "init=epsg:4326"
>>>>>   END
>>>>> <snip...>
>>>>>
>>>>> 2. I explicity allow for a wms request to be made for the layer in
>>>>> EPSG:900913 by setting the following in my MapServer LAYER:
>>>>>   METADATA
>>>>>     "wms_srs"             "EPSG:4326 EPSG:900913"
>>>>> <snip...>
>>>>>
>>>>> 3. I define my TileCache layer so that it requests images from
>>>>> Mapserver in EPSG:900913.
>>>>> [v2_20m_global]
>>>>> type=MapServerLayer
>>>>> mapfile=/var/www/mapfiles/v2_20m_global/v2_20m_global.map
>>>>> metaTile=true
>>>>> metaSize=2,2
>>>>> metaBuffer=0,500
>>>>> layers=imagery
>>>>> spherical_mercator=true
>>>>> srs=EPSG:900913
>>>>>
>>>>> That's what works for me.
>>>>>
>>>>> Roger
>>>>> --
>>>>>
>>>>> On Thu, May 21, 2009 at 5:24 AM, Chad Clabaugh <cclabaugh at centwire.com>
>>>>> wrote:
>>>>>> Thank you Roger, for your response.  I have done that but I do not
>>>>>> understand how tilecache works.  The images that are returned from
>>>>>> mapserver
>>>>>> line up perfectly. But the images returned from tilecache do not align
>>>>>> very
>>>>>> well (they're distorted).  If tilecache is simply caching the returned
>>>>>> images then I do not understand where this distortion comes from.  Any
>>>>>> thoughts?
>>>>>>
>>>>>> Thanks!
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Roger André [mailto:randre at gmail.com]
>>>>>> Sent: Wednesday, May 20, 2009 11:46 PM
>>>>>> To: Chad Clabaugh
>>>>>> Cc: mapserver-users at lists.osgeo.org
>>>>>> Subject: Re: [mapserver-users] Precache
>>>>>>
>>>>>> Your request is somewhat lacking in detail, but assuming that your
>>>>>> goal is a simple one, here is one way to accomplish this.
>>>>>>
>>>>>> 1. Create a MapServer project that displays your shapefile in whatever
>>>>>> style you choose.
>>>>>> 2. Setup a TileCache instance that points to your MapServer project.
>>>>>> 3. Run the tilecache_seed.py script to pre-generate tiles.
>>>>>>
>>>>>> Roger
>>>>>> --
>>>>>>
>>>>>> On Wed, May 20, 2009 at 12:16 PM, Chad Clabaugh
>>>>>> <cclabaugh at centwire.com>
>>>>>> wrote:
>>>>>>> How can I precache tile images from shapefiles?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Thanks
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Chad Clabaugh
>>>>>>>
>>>>>>> Technical Support, Engineering
>>>>>>>
>>>>>>> Office: 260.760.6398
>>>>>>>
>>>>>>> Mobile: 260.466.8861
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> mapserver-users mailing list
>>>>>>> mapserver-users at lists.osgeo.org
>>>>>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>>>>>
>>>>>>>
>>>>>>
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>>>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>>>
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>>>
> 
> 