re: gtk gis
Date: Thu, 11 Jun 2009 15:36:31 +0200 From: Andrea Zagli aza...@inwind.it Subject: gtk gis To: gtk-app gtk-app-devel-list@gnome.org Message-ID: 20090611153631.146644e2qf6bk...@saetta.homelinux.org Content-Type: text/plain; charset=UTF-8; DelSp=Yes; format=flowed do you know some widget that can display maps (from shp or postgis) and also allows very simple editing? on google i found only (old) widgets without editing thanks in advance I have helped a client make their own library. It uses cairo for all the output (not just for gtk). Cairo really is the magic that makes all the vectors and alpha blending so darn awesome. Some libraries that are excellent you can look into for building blocks are: -proj4 (cartographic projection) (everything uses this behind the scenes, but no one mentions it) -shapelib (most gis data is in or can be in shape files) -netcdf (things like weather radar overlays) -imagemagick (work with other non-png image formats for just cairo outside of gtk) -libcurl w/ glib bindings or libsoup for http data some other sources of data: -yahoo maps is kinda hackable and is ok for internal use (google maps wants you to only use it for externally reachable sites) -www.gisdatadepot.com more usa specific: -weather.gov -usgs.gov for academia (and through other pay sites): -http://www.unidata.ucar.edu/software/ldm/ (live scientific data of several kinds) All this is 2D, but it suites our needs very well. There is of course the http://grass.osgeo.org/ project which has many links and information for this area. I'm still looking for a simple open source library for some basic astronomical features like where the sunlight is, etc. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Fwd: gtk gis
On Fri, 2009-06-12 at 21:43 +0200, Andrea Zagli wrote: do you know some widget that can display maps (from shp or postgis) and also allows very simple editing? As Emmnanuel already pointed out, there is libchamplain [1] that is aiming at being a full fledged map widget. Right now, you cannot draw from postgis or shp data, but Simon Wenner is working as a summer of code to provide local rendering using libmemphis. Nothing could stop you to implement your own ChamplainMapSource within your application which would render the PostGis data to a ClutterCairo texture. There is no editing either, but the map is fully interactive so you could program interactions using common events such as click, mouse move and other. If you have more questions, feel free to join the party on #champlain on the mailing list: libchamplain-l...@gnome.org Pierre-Luc [1] http://projects.gnome.org/libchamplain/ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
gtk gis
do you know some widget that can display maps (from shp or postgis) and also allows very simple editing? on google i found only (old) widgets without editing thanks in advance ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: gtk gis
Andrea Zagli wrote: do you know some widget that can display maps (from shp or postgis) and also allows very simple editing? Perhaps GtkDrawingArea? http://library.gnome.org/devel/gtk/stable/GtkDrawingArea.html I use myself OpenGL areas, with GtkGLExt and Mesa, it works great. If you need more information on this please let me know. Carlos on google i found only (old) widgets without editing thanks in advance ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: gtk gis
On Thu, Jun 11, 2009 at 3:36 PM, Andrea Zagli aza...@inwind.it wrote: do you know some widget that can display maps (from shp or postgis) and also allows very simple editing? Libchamplain (http://projects.gnome.org/libchamplain/) can render maps from various public sources. There's a route branch that should be merged before the end of the week that will allow for basic drawing. The current version allows markers to be added to an existing maps and markers can be rendered with cairo. -- Emmanuel Rodriguez ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
