Hi! Well, Dane... I think you are simply a breath of unimaginable fresh air!!! I did adapt your script and it worked like a charm. Server is up and running and serving map requests. However (sadly so) my Nice Map WMS client still has issues with the OGC server. Running the server standalone, this is the xml output the server gives when the Nice Map module requests capabilities (xml file attached) Looks like it talks to the ogcserver.conf files for these properties. I would have attached a Drupal screenshot of the results of this query but I'm not sure if I would not exceed mail size file limits.
Thanks for the good work. I do appreciate greatly. Jome -----Original Message----- From: Dane Springmeyer [mailto:[email protected]] Sent: Tuesday, August 11, 2009 3:15 PM To: Jome Akpoduado Cc: [email protected] Subject: Re: [Mapnik-users] My WMS server is running.... what next? On Aug 11, 2009, at 5:59 AM, Jome Akpoduado wrote: > Hello Dane, > Thanks again. Some more questions. > 1. Mod_wsgi. Is this a module I must download and install or > is it already present within my installation? The documentation you > pointed me to only seems to talk about configuration with the > assumption that mod_wsgi already exists within the installation. You need to install it. On Ubuntu you would generally do: sudo apt-get install libapache2-mod-wsgi sudo a2enmod wsgi sudo /etc/init.d/apache2 restart Installation and setup instructions can be found on that google code site. You may also be able to adapt some instructions I have written for a Mapnik tileserver to the OGCServer: http://bitbucket.org/springmeyer/tilelite/src/tip/tilelite.wsgi > 2. When my WMS client talked to the server, it sent a > GetCapabilities request to the server and was expecting such things > as CRS projection, Layers etc. How do I get my server to report > these capabilities (and have these capabilities as well?) The server should automatically respond to a GetCapabilities request. Honestly I don't think that has seen much testing so if it didn't work it may be a bug. Can you intercept the actual request your client is making and try sending it yourself as a browser url? And see what comes back - and error or and xml capabilities document? > > > Thanks. > Jome. > From: Dane Springmeyer [mailto:[email protected]] > Sent: Tuesday, August 11, 2009 2:34 PM > To: Jome Akpoduado > Cc: [email protected] > Subject: Re: [Mapnik-users] My WMS server is running.... what next? > > Jome, > > On Aug 11, 2009, at 4:42 AM, Jome Akpoduado wrote: > > > Hello one more time Dane. > Looks like I'm on a roll here. Many thanks for the tips and insight > you gave me. I ran the url request below against the standalone > server at port 8000 like this . http://greenstreamsa.com:8000/wms.py?width=1024&height=768&styles=Plain&bgco lor=0xa0acb8&request=GetMap&version=1.1.1&format=image/png&layers=world&srs= EPSG:4326&EXCEPTIONS=application/vnd.ogc.se_inimage&bbox=-179,-58.8110470437 ,179,72.092336216 > And I got an image! Not sure I've felt like this since high school. > MY curiousity's heightening by the sec. > > > Cool, it looks like that errors out because the layer 'world' does > not exist in your mapfile. I'm not sure what the layer is called in > your mapfile so I changed it to grab all layers ('__all__'): > > http://greenstreamsa.com:8000/wms.py?width=520&height=260&styles=&bgcolor=0x a0acb8&request=GetMap&version=1.1.1&format=image/png&layers=__all__&srs=EPSG :4326&EXCEPTIONS=application/vnd.ogc.se_inimage&bbox=-179,-58.8110470437,179 ,72.092336216 > > > > What I need to know now is this > 1. How do I set the wms.py to accept the parameters the string > passes to generate the appropriate image. > > It automatically accepts what the WMS spec allows. If you want to > pass custom parameters then you'll be needing to code that yourself. > > > At the moment my map factory is "linked" to an xml file and no > matter what I adjust in the request (the parameters) I still get the > same image. > > > Right, you determine the xml file that your server is able to serve > by changing the ogcserver.conf to point to a different > map_factory.py. Currently there is not support for reading in more > than one xml mapfile. > > > 2. How do I get the server to run without being "standalone"? > > Just install mod_wsgi within apache and point it at the script you > created for the standalone server. mod_wsgi will look for the > 'application' variable in the script and launch a long running > process: > > http://code.google.com/p/modwsgi/wiki/QuickConfigurationGuide > > > > > Anticipating your "great" answers!!!! > :D > Jome > > From: Jome Akpoduado [mailto:[email protected]] > Sent: Tuesday, August 11, 2009 12:56 PM > To: 'Dane Springmeyer' > Cc: '[email protected]' > Subject: RE: [Mapnik-users] My WMS server is running.... what next? > > Hello again Dane. > Looks like I got the standalone WSGI server working!!! Phew!!! Now > I know my installation works? What do I have to do for the server to > respond to requests like this? > http://greenstreamsa.com/wms.py?width=520&height=260&styles=Plain&bgcolor=0x a0acb8&request=GetMap&version=1.1.1&format=image/png&layers=world&srs=EPSG:4 326&EXCEPTIONS=application/vnd.ogc.se_inimage&bbox=-179,-58.8110470437,179,7 2.092336216 > > Many Many thanks. > An excited newbie!!!!! > > From: Dane Springmeyer [mailto:[email protected]] > Sent: Tuesday, August 11, 2009 6:15 AM > To: Jome Akpoduado > Cc: [email protected] > Subject: Re: [Mapnik-users] My WMS server is running.... what next? > > Hello Jome, > > Glad you are excited about getting started. Sounds like you've made > some great progress so far. > > Sorry about the lack of step by step documentation for WMS. If you > continue to post places you get stuck we can surely provide tips as > you go along. You might also consider stopping by the #mapnik room > on irc.freenode.net. > > As far as the problem you describe below: Can you say a bit more > about how you are making the Http request? What is the full URL/ > Query String? Usually one would use a client like OpenLayers to > automatically create the request once the server is set up properly. > To confirm the server is set up you should simply be able to go to > the url where you have exposed it without providing any query string > and you'll get a welcome message like this: > > http://wms.dbsgeo.com/ > > If you are not yet using the Firebug extension to Mozilla Firefox > that is a great way of debugging requests and responses, once you > start adding layer and other parameters. > > Also, when I am configuring the WMS server I always first run in > 'WSGI' Standalone mode so that I don't have to dig through apache > logs to figure out potential configuration problems. Using the > standalone WSGI setup as a development server launched in a terminal > process all errors simply print to the screen. > > See: http://trac.mapnik.org/wiki/OgcServer#SampleConfigurations > > Hope that helps. Feel free to shoot more questions as you have them. > > Dane > > > On Aug 10, 2009, at 5:52 AM, Jome Akpoduado wrote: > > > Hello, > Please let me establish a baseline before I proceed. I got excited > about Mapnik when I saw what it could achieve via the Drupal WMS > client, Nice Map. I decided to build my own WMS server for my Drupal > websites and I think I've gotten way over my head on this. I've no > experience in python (but that has been fast changing in the last > few days) but I managed to get Mapnik installed on my server > (running Ubuntu 8.10) and followed the available tutorials on > creating first maps and I think I passed that hurdle so far. > However, where I get stumped is when I make an http request for a > map (much like what the Nice map Drupal module would do) and nothing > just happens. > I've searched and scoured through sites looking for any good > tutorials that could help an enthusiastic newbie like me get off the > ground with even the simplest of external map requests. Can anyone > help out or point me to good enough documentation that us mere > mortals can follow? > Many thanks. > > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users > >
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