Dynamic sliders would require the plugin to draw the points, not just build a new shape file. Which would be even better. It would be great if we could have a symbology plugin (like the Diagram plugin.)
But I was imagining something much simpler, that just constructs a new layer of points. For those that don't know, Elance is a fairly simple system to hire freelance people. I've used it a few of times for django projects and LaTex stuff. -- John Abraham Sent from my iPhone, please excuse any typos. On 2012-01-31, at 6:08 PM, "Scott Parker" <[email protected]> wrote: > If the calculation is fast enough there could be a dynamic slider for points > per dot. > > Another place where this would be useful is stream definition from a flow > accumulation raster. > > Scott > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of John Abraham > Sent: Tuesday, January 31, 2012 4:40 PM > To: [email protected] > Subject: [Qgis-developer] dot density plugin (anyone used eLance to > funddevelopment?) > > Hi everyone. > > I want to build a better dot-density map plugin. The one that is included > in the "Vector->Research Tools->Random Points" is a bit clumsy because: > > a) you already need to have a field describing the number of points, and a > lot of the time I want to try 1dot=100 and 1dot=500 and 1dot=1000 in an > interactive way to see what looks better, and not have to go into the > attributes (or PostGIS) to try different numbers, and > > b) usually I want to have several fields shown at once (blue dots for > households and green dots for jobs, or different shades of blue for data > from different years) > > c) sometimes I want to show negative numbers too, in a different color (1 > red dot = 100 less jobs, 1 blue dot = 100 more jobs) > > It's probably a pretty easy python plugin to develop, simply build a new > layer with random dots generated from several fields, each dot with a single > attribute being the field it was generated from. And a user dialog to select > the field and the (positive or negative) ratio of dots per field value. > The color coding can be done by the user afterwards, in the new layer. > > I don't think I can write this myself or in-house right now since I'm more > of a Java programmer and our best python programmer is swamped. I'm > thinking of outsourcing it to eLance.com, since QGIS.ORG cannot accept > earmarked donations. What do you guys think? Or should I just file a > feature request in the bug tracking system and hope for the best? > > -- > John Abraham > [email protected]_______________________________________________ > Qgis-developer mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-developer > _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
