Dane, Would mapnik can be easily incorporated to Thuban? Thuban uses Wxpython and it is purely python GIS.
http://thuban.intevation.org/doc/users_manual_for_thuban_1.0/html/c34.html Noli On 9/24/10, Dane Springmeyer <[email protected]> wrote: > > On Sep 23, 2010, at 8:15 PM, Angus Dickey wrote: > >> Hi, >> >> I am new to Mapnik and was thinking about using Mapnik as the mapping >> solution for a desktop GIS application. My initial thoughts were to use: >> >> - Python >> - wxPython >> - Mapnik >> > > Sounds fun! > >> With other packages (OGR/GDAL, Shapely, pyproj, etc.) if needed. > > Yep. > >> >> I have looked at the Mapnik samples and API and I know it can make a great >> looking map, what I am not sure about is the ability to add a >> temporary/dynamic layer. > > You have full access in Python for dynamically constructing both styles and > layers. I recommend creating your own container for them, then pushing them > into a mapnik.Map once you are ready to render. > > You can also have a base set of styles+layers in a mapnik.Map that is not > temporary and then render temp layers to a different mapnik.Image, then > blend the two together using im.blend(). > >> What I would like to be able to do is have Mapnik set up with static >> background mapping data and add markup (or temp layers) to Mapnik made up >> of geometry (points/lines/polys) calculated elsewhere. > > Sort of. It is not yet exposed in Mapnik properly to push geometries > straight into a memory Datasource (only points are wrapped via > PointDatasource), so its easier to read from disk (even if you create all > definitions of the layer on the fly). > >> Is this possible in Mapnik? I see there are some provisions for a "Memory >> Datasource" but it looks like it only supports points? > > Right. Basically we've been waiting on a proper wkt/wkb parsing support. > > However, you can actually do this right now if you have shapely installed, > see: > > http://code.google.com/p/mapnik-utils/source/detail?r=1049 > > NOTE: depends on Mapnik trunk. > >> >> Anyone have any thoughts on how this might be done? I thought about having >> a text based OGR layer (GeoJSON?) added to Mapnik and changing this file >> on disk; doesn't really seem like a good idea though... > > Its a fine idea and one that is used by nikweb. But yes, it would feel nicer > to push them in dynamically and for now see the above script and let me know > your comments. Alberto Valverde was the clever Mapnik developer that added > the shapely wkb reading support, which I think is meant to be temporary but > works nicely from my limited tests. > > Dane > >> >> Any info or thoughts are appreciated. >> >> Thanks, >> >> ~Angus >> >> >> >> >> >> >> _______________________________________________ >> 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 > _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
