Hi all, well, I've been experiencing lately with QGis diagram overlay feature and I have to say that is still not enough for what I need. Plots are not very customizable, adding categories is a matter of patience when you have a relatively large amount of fields to plot (in my case, in anchovy length distribution, about 25 of them) and normalization of the diagrams is a little confusing. Anyway, it is a big feature but unfortunately at last I have had to make my maps with gvSIG what really disappoints me because map tools in gvSIG are (for me) a little bit poor.
But I'have been messing with qgis new simbology and I have found very interesting the option "RULE BASED" (I guess this is the correct translation for the spanish "Basado en reglas"). Because I can define individual marker for different values (based in that rules), I've done the following: 1) I've created an bar chart with matplotlib as I want it to be (scale, ticks..., colors) 2) I've saved it to a folder in my computer as SVG graphic, say so /home/Figures 3) I've created a soft link to that folder in /usr/local/share/qgis/svg Following this steps, what I get is the chance to choose my graph as the marker of my point and I have to say that is really, really cool for me because the look of the maps is great!! But there is one problem... You can choose the graph but you don't have any clue to tell which graph is what you want, because all you get in the dialog of selection are the thumbnails of the SVG's in that folder!!! So with, let's say 20 micro-pictures to choose is not very useful... So my idea/suggestion/wish is: To add to the symbol properties dialog the possibility of loading a concrete SVG as marker, apart from the list of default markers. It will not be a feature like automatic diagram overlay but I think it is a very simple improvement that provides a solution and eases the work of overlaying charts in maps (not only pie and bar charts) I don't really know if this is of any use for you but in my case, it has been the big prize in days, because I feared of having to say goodbye to Qgis until the diagram feature is improved. Also I apologize if what I've said is just a obviousness... Maybe this is a feature everybody knows and here I am thinking that I've discovered the Philosopher's stone... :) Best regards Jorge Tornero -- ----------------------------------------- Jorge Tornero Núñez Centro Oceanográfico de Cádiz Instituto Español de Oceanografía Puerto Pesquero - Muelle de Levante, s/n 11006 Cádiz - España Tel. +34 956294189 Fax. +34 956294232 www.ieo.es
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