Proportional point symbols indeed ARE one of the most important cartographic map types. If this gets implemented well in QGIS I am all for it. But please take care to do it right then! One important thing to note: For most symbols (2d symbols like squares and circles, ect) it's NOT 'double population should mean double SIZE', its actually 'double population should mean double AREA of the symbol'. Ie. 1x1 mm square = 10 people , 10x10 mm square = 1000 people.
I've attached some slides from a lecture I regularly give about that. If needed, I can provide further advise or additional references... [attachement was refused, I've put it on: http://kartoweb.itc.nl/fileshare/propPointSymbols.pdf ] yours -- Barend Köbben International Institute for Geo-Information Sciences and Earth Observation (ITC) PO Box 6, 7500AA Enschede, The Netherlands +31 (0)53 4874253 > > It seems to be a more common feature than I thought. Still I don't > understand the use if this (I think double size should mean double > population) but I guess I can live with the clutter. > > Goyo International Institute for Geo-Information Science and Earth Observation (ITC) Chamber of Commerce: 410 27 560 E-mail disclaimer The information in this e-mail, including any attachments, is intended for the addressee only. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or action in relation to the content of this information is strictly prohibited. If you have received this e-mail by mistake, please delete the message and any attachment and inform the sender by return e-mail. ITC accepts no liability for any error or omission in the message content or for damage of any kind that may arise as a result of e-mail transmission. _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
