I am afraid I do not have the skills for long term maintenance, so providing a quick hack through the mailing list seemed better than keeping the issue unresolved. What I am missing here is a reference dataset to check whether a modification in the source code of the plugin affects its behaviour. On the convex dataset I was considering the result was not as nice as could have been expected from the illustration found at http://anitagraser.com/2010/11/13/creating-cartograms-with-qgis-cartogram-creator/ whose dataset I do not have access to. I am currently running the plugin on a world population dataset as found at http://thematicmapping.org/downloads/world_borders.php to check on a non-convex map whether the result matches expectations, but a reliable testbed would be better suited. As an example which hints at proper operation of the plugin, the 2005 world population map becomes http://jmfriedt.sequanux.org/world_cartogram.png with purple the original dataset, green 10 iterations and greyish blue being 27 interations.
If such a result seems relevant, maybe some knowledgeable user can comment on the figures of http://jmfriedt.sequanux.org/lm_cart.pdf in which the Voronoi polygon map generated from discrete measurements (train travel time in France, Fig. 1) becomes the cartograms of Fig. 4 which do not seem that informative to me. Is this an known artefact from convex maps ? (obviously a diffusion algorithm applied to a convex dataset ends up generating a cicular map I assume). Happy new year, JM ----- Mail original ----- De: "Richard Duivenvoorde" <rdmaili...@duif.net> À: frie...@free.fr, Qgis-user@lists.osgeo.org, "carson farmer" <carson.far...@gmail.com>, kikkocrist...@gmail.com Envoyé: Jeudi 1 Janvier 2015 09:29:50 Objet: Re: [Qgis-user] cartogram plugin On 30-12-14 09:39, frie...@free.fr wrote: > trivial comment concerning the Cartogram Plugin: Hi, as the original author is Carson Farmer, and apparently people ask for this plugin, I'm wondering if it is maybe an idea to put this plugin in the main QGIS plugin repository. And if Carson does not have time to do the maintaining of the plugin, we ask one of the users to maybe do the maintenance? @Carson: what's you opinion about that? @Others: any volunteers? We every now and then have plugins for which there is interest, but the original author lost interest, of just does not find time anymore to invest it in responding to questions or doing trivial fixes if needed for a new QGIS version. So in general: in these cases: please try to contact the original author and see if you can maybe take over the maintainer ship of such a plugin? In this case for example it looks like some lines of code would make it usable again for QGIS users... Active central maintenance and availability via plugins.qgis.org is better then scattered fixes over mailing lists and GisStackExchange/ Any takers, IF Carson agrees? Regards, Richard Duivenvoorde _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
