On Sep 24, 2010, at 12:00 AM, Noli Sicad wrote: > Dane, > > Would mapnik can be easily incorporated to Thuban? Thuban uses > Wxpython and it is purely python GIS. >
Mapnik is a library, so should be well suited for being called as a renderer by any application written in C++ or Python (and some have used Mapnik as the desktop rendering engine behind C#/.NET apps.) > 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
