On May 31, 2011, at 6:46 AM, Ryan McCall wrote: > So I recently started running mapnik 0.7.1 on Windows xp and I am trying to > find a way to save and access the layers I load using python. To start, I use > the code below to create the layer from a database table and I have access > to it. > lyr = Layer(t) > lyr.datasource = PostGIS(host=h,port=p,user=u,password = pw, > dbname=dbn,table=t) > I was wondering how I should save the layer so that after I close Python and > reopen it, I can get access to the layer without having to remake the layer > from the database. Any advice or providing links to relevant documentation > would be greatly appreciated. >
Hi Ryan, As long as you pass the 'extent' parameter, the creation on the fly of a PostGIS datasource should be quite fast. So, can you store the extents of your table in your database table and use that when you re-create the Mapnik layer? If you truly want to stash the list of mapnik postgis parameters then pickling a python dictionary might work nicely. Dane > _______________________________________________ > 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
