Hi Jome, 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.
Yes, mod_wsgi is an Apache module which allows Apache to serve WSGI-compliant applications. You can see it as an alternative to FCGI or CGI. Under Ubuntu, you can simply run: apt-get install libapache2-mod-wsgi Of course, you can also compile your own but it requires a little more time. > > 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?) Normally, the OGCserver (the server bundled in Mapnik distribution) is able to process GetCapabilities requests. Have you tried something like: http://greenstreamsa.com:8000/wms.py?request=GetCapabilities&version=1.1.1&service=WMS Do you get an error? Regards, Gilles > > > > > > 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&bgcolor=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 > <http://greenstreamsa.com:8000/wms.py?width=1024&height=768&styles=Plain&bgcolor=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=0xa0acb8&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 > <http://greenstreamsa.com:8000/wms.py?width=520&height=260&styles=&bgcolor=0xa0acb8&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] > <mailto:'[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=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 > <http://greenstreamsa.com/wms.py?width=520&height=260&styles=Plain&bgcolor=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>| > > > > 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] <mailto:[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] <mailto:[email protected]> > https://lists.berlios.de/mailman/listinfo/mapnik-users > > > > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
